Re: [PATCHv3 2/2] arm: Get rid of meminfo

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* Re: [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-11 21:14   ` Laura Abbott
  (?)
  (?)
@ 2014-02-11  3:33     ` Kukjin Kim
  -1 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-11  3:33 UTC (permalink / raw)
  To: Laura Abbott
  Cc: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, Kukjin Kim, linux-arm-kernel, Nicolas Pitre,
	Courtney Cavin, Grygorii Strashko, Ard Biesheuvel, linux-arm-msm,
	Will Deacon, linux-kernel, Leif Lindholm, Grant Likely, linux-mm,
	Catalin Marinas, Santosh Shilimkar

On 02/12/14 06:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper<jason@lakedaemon.net>
> Acked-by: Catalin Marinas<catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm<leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott<lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-11  3:33     ` Kukjin Kim
  0 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-11  3:33 UTC (permalink / raw)
  To: Laura Abbott
  Cc: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, Kukjin Kim, linux-arm-kernel, Nicolas Pitre,
	Courtney Cavin, Grygorii Strashko, Ard Biesheuvel, linux-arm-msm,
	Will Deacon, linux-kernel, Leif Lindholm, Grant Likely, linux-mm,
	Catalin Marinas, Santosh Shilimkar, Andrew Morton,
	Marek Szyprowski

On 02/12/14 06:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper<jason@lakedaemon.net>
> Acked-by: Catalin Marinas<catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm<leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott<lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-11  3:33     ` Kukjin Kim
  0 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-11  3:33 UTC (permalink / raw)
  To: Laura Abbott
  Cc: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, Kukjin Kim, linux-arm-kernel, Nicolas Pitre,
	Courtney Cavin, Grygorii Strashko, Ard Biesheuvel, linux-arm-msm,
	Will Deacon, linux-kernel, Leif Lindholm, Grant Likely, linux-mm,
	Catalin Marinas, Santosh Shilimkar, Andrew Morton,
	Marek Szyprowski

On 02/12/14 06:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper<jason@lakedaemon.net>
> Acked-by: Catalin Marinas<catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm<leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott<lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-11  3:33     ` Kukjin Kim
  0 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-11  3:33 UTC (permalink / raw)
  To: linux-arm-kernel

On 02/12/14 06:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper<jason@lakedaemon.net>
> Acked-by: Catalin Marinas<catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm<leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott<lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 0/2] Remove ARM meminfo
@ 2014-02-11 21:14 ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: Russell King, linux-arm-kernel
  Cc: Laura Abbott, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar, linux-mm, Andrew Morton,
	Courtney Cavin, Marek Szyprowski, Grant Likely

Hi,

This is v3 of the patch to remove meminfo from arm and use memblock
directly. Testing an

Thanks,
Laura


v3: Fixed compilation issue for CONFIG_SPARSEMEM. Fixed several typos
in spitz.c. Removed early_init_dt_add_memory_arch per Grant's suggestion.

v2: Implemented full commandline support for mem@addr

Laura Abbott (2):
  mm/memblock: add memblock_get_current_limit
  arm: Get rid of meminfo

 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 include/linux/memblock.h                 |    2 +
 mm/memblock.c                            |    5 ++
 35 files changed, 143 insertions(+), 291 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 0/2] Remove ARM meminfo
@ 2014-02-11 21:14 ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: Russell King, linux-arm-kernel
  Cc: Laura Abbott, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar, linux-mm, Andrew Morton,
	Courtney Cavin, Marek Szyprowski, Grant Likely

Hi,

This is v3 of the patch to remove meminfo from arm and use memblock
directly. Testing an

Thanks,
Laura


v3: Fixed compilation issue for CONFIG_SPARSEMEM. Fixed several typos
in spitz.c. Removed early_init_dt_add_memory_arch per Grant's suggestion.

v2: Implemented full commandline support for mem@addr

Laura Abbott (2):
  mm/memblock: add memblock_get_current_limit
  arm: Get rid of meminfo

 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 include/linux/memblock.h                 |    2 +
 mm/memblock.c                            |    5 ++
 35 files changed, 143 insertions(+), 291 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 0/2] Remove ARM meminfo
@ 2014-02-11 21:14 ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: linux-arm-kernel

Hi,

This is v3 of the patch to remove meminfo from arm and use memblock
directly. Testing an

Thanks,
Laura


v3: Fixed compilation issue for CONFIG_SPARSEMEM. Fixed several typos
in spitz.c. Removed early_init_dt_add_memory_arch per Grant's suggestion.

v2: Implemented full commandline support for mem at addr

Laura Abbott (2):
  mm/memblock: add memblock_get_current_limit
  arm: Get rid of meminfo

 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 include/linux/memblock.h                 |    2 +
 mm/memblock.c                            |    5 ++
 35 files changed, 143 insertions(+), 291 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 1/2] mm/memblock: add memblock_get_current_limit
  2014-02-11 21:14 ` Laura Abbott
@ 2014-02-11 21:14   ` Laura Abbott
  -1 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: linux-mm, Andrew Morton
  Cc: Laura Abbott, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar

Appart from setting the limit of memblock, it's also useful to be able
to get the limit to avoid recalculating it every time. Add the function
to do so.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 include/linux/memblock.h |    2 ++
 mm/memblock.c            |    5 +++++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 1ef6636..8a20a51 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -252,6 +252,8 @@ static inline void memblock_dump_all(void)
 void memblock_set_current_limit(phys_addr_t limit);
 
 
+phys_addr_t memblock_get_current_limit(void);
+
 /*
  * pfn conversion functions
  *
diff --git a/mm/memblock.c b/mm/memblock.c
index 39a31e7..7fe5354 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1407,6 +1407,11 @@ void __init_memblock memblock_set_current_limit(phys_addr_t limit)
 	memblock.current_limit = limit;
 }
 
+phys_addr_t __init_memblock memblock_get_current_limit(void)
+{
+	return memblock.current_limit;
+}
+
 static void __init_memblock memblock_dump(struct memblock_type *type, char *name)
 {
 	unsigned long long base, size;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation


^ permalink raw reply related	[flat|nested] 26+ messages in thread

* [PATCHv3 1/2] mm/memblock: add memblock_get_current_limit
@ 2014-02-11 21:14   ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: linux-mm, Andrew Morton
  Cc: Laura Abbott, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar

Appart from setting the limit of memblock, it's also useful to be able
to get the limit to avoid recalculating it every time. Add the function
to do so.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 include/linux/memblock.h |    2 ++
 mm/memblock.c            |    5 +++++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 1ef6636..8a20a51 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -252,6 +252,8 @@ static inline void memblock_dump_all(void)
 void memblock_set_current_limit(phys_addr_t limit);
 
 
+phys_addr_t memblock_get_current_limit(void);
+
 /*
  * pfn conversion functions
  *
diff --git a/mm/memblock.c b/mm/memblock.c
index 39a31e7..7fe5354 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1407,6 +1407,11 @@ void __init_memblock memblock_set_current_limit(phys_addr_t limit)
 	memblock.current_limit = limit;
 }
 
+phys_addr_t __init_memblock memblock_get_current_limit(void)
+{
+	return memblock.current_limit;
+}
+
 static void __init_memblock memblock_dump(struct memblock_type *type, char *name)
 {
 	unsigned long long base, size;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

^ permalink raw reply related	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-11 21:14 ` Laura Abbott
  (?)
@ 2014-02-11 21:14   ` Laura Abbott
  -1 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: Laura Abbott, linux-kernel, linux-arm-msm, Leif Lindholm,
	Grygorii Strashko, Catalin Marinas, Rob Herring, Ard Biesheuvel,
	Will Deacon, Nicolas Pitre, Santosh Shilimkar, linux-mm,
	Andrew Morton, Courtney Cavin, Marek Szyprowski, Grant Likely

memblock is now fully integrated into the kernel and is the prefered
method for tracking memory. Rather than reinvent the wheel with
meminfo, migrate to using memblock directly instead of meminfo as
an intermediate.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 33 files changed, 136 insertions(+), 291 deletions(-)

diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 17a3fa2..c43473a 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -14,7 +14,6 @@
 #include <linux/reboot.h>
 
 struct tag;
-struct meminfo;
 struct pt_regs;
 struct smp_operations;
 #ifdef CONFIG_SMP
@@ -47,8 +46,7 @@ struct machine_desc {
 	enum reboot_mode	reboot_mode;	/* default restart mode	*/
 	struct smp_operations	*smp;		/* SMP operations	*/
 	bool			(*smp_init)(void);
-	void			(*fixup)(struct tag *, char **,
-					 struct meminfo *);
+	void			(*fixup)(struct tag *, char **);
 	void			(*init_meminfo)(void);
 	void			(*reserve)(void);/* reserve mem blocks	*/
 	void			(*map_io)(void);/* IO mapping function	*/
diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
index c2f5102..bf47a6c 100644
--- a/arch/arm/include/asm/memblock.h
+++ b/arch/arm/include/asm/memblock.h
@@ -1,10 +1,9 @@
 #ifndef _ASM_ARM_MEMBLOCK_H
 #define _ASM_ARM_MEMBLOCK_H
 
-struct meminfo;
 struct machine_desc;
 
-void arm_memblock_init(struct meminfo *, const struct machine_desc *);
+void arm_memblock_init(const struct machine_desc *);
 phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
 
 #endif
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index 8d6a089..0196091 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
  */
 #define NR_BANKS	CONFIG_ARM_NR_BANKS
 
-struct membank {
-	phys_addr_t start;
-	phys_addr_t size;
-	unsigned int highmem;
-};
-
-struct meminfo {
-	int nr_banks;
-	struct membank bank[NR_BANKS];
-};
-
-extern struct meminfo meminfo;
-
-#define for_each_bank(iter,mi)				\
-	for (iter = 0; iter < (mi)->nr_banks; iter++)
-
-#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
-#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
-#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
-#define bank_phys_start(bank)	(bank)->start
-#define bank_phys_end(bank)	((bank)->start + (bank)->size)
-#define bank_phys_size(bank)	(bank)->size
-
 extern int arm_add_memory(u64 start, u64 size);
 extern void early_print(const char *str, ...);
 extern void dump_machine_table(void);
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index 8c14de8..7807ef5 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/root_dev.h>
 #include <linux/screen_info.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/system_info.h>
@@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
 	}
 
 	if (mdesc->fixup)
-		mdesc->fixup(tags, &from, &meminfo);
+		mdesc->fixup(tags, &from);
 
 	if (tags->hdr.tag == ATAG_CORE) {
-		if (meminfo.nr_banks != 0)
+		if (memblock_phys_mem_size())
 			squash_mem_tags(tags);
 		save_atags(tags);
 		parse_tags(tags);
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index f751714..398cd5f 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -26,11 +26,6 @@
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 
-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	arm_add_memory(base, size);
-}
-
 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
 	return memblock_virt_alloc(size, align);
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1e8b030..7dd83d0 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -625,15 +625,8 @@ void __init dump_machine_table(void)
 
 int __init arm_add_memory(u64 start, u64 size)
 {
-	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
 	u64 aligned_start;
 
-	if (meminfo.nr_banks >= NR_BANKS) {
-		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
-			(long long)start);
-		return -EINVAL;
-	}
-
 	/*
 	 * Ensure that start/size are aligned to a page boundary.
 	 * Size is appropriately rounded down, start is rounded up.
@@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
 		aligned_start = PHYS_OFFSET;
 	}
 
-	bank->start = aligned_start;
-	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
+	start = aligned_start;
+	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
 
 	/*
 	 * Check whether this memory region has non-zero size or
 	 * invalid node number.
 	 */
-	if (bank->size == 0)
+	if (size == 0)
 		return -EINVAL;
 
-	meminfo.nr_banks++;
+	memblock_add(start, size);
 	return 0;
 }
 
@@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
  * Pick out the memory size.  We look for mem=size@start,
  * where start and size are "size[KkMm]"
  */
+
 static int __init early_mem(char *p)
 {
 	static int usermem __initdata = 0;
@@ -706,7 +700,8 @@ static int __init early_mem(char *p)
 	 */
 	if (usermem == 0) {
 		usermem = 1;
-		meminfo.nr_banks = 0;
+		memblock_remove(memblock_start_of_DRAM(),
+			memblock_end_of_DRAM() - memblock_start_of_DRAM());
 	}
 
 	start = PHYS_OFFSET;
@@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
 static inline void reserve_crashkernel(void) {}
 #endif /* CONFIG_KEXEC */
 
-static int __init meminfo_cmp(const void *_a, const void *_b)
-{
-	const struct membank *a = _a, *b = _b;
-	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
-	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
-}
-
 void __init hyp_mode_check(void)
 {
 #ifdef CONFIG_ARM_VIRT_EXT
@@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
-	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
-
 	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
 	setup_dma_zone(mdesc);
 	sanity_check_meminfo();
-	arm_memblock_init(&meminfo, mdesc);
+	arm_memblock_init(mdesc);
 
 	paging_init(mdesc);
 	request_standard_resources(mdesc);
diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
index b476424..4d04b91 100644
--- a/arch/arm/mach-clps711x/board-clep7312.c
+++ b/arch/arm/mach-clps711x/board-clep7312.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/string.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -26,11 +27,9 @@
 #include "common.h"
 
 static void __init
-fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_clep7312(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = 0x01000000;
+	memblock_add(0xc0000000, 0x01000000);
 }
 
 MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
index fe6184e..b617aa2 100644
--- a/arch/arm/mach-clps711x/board-edb7211.c
+++ b/arch/arm/mach-clps711x/board-edb7211.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/partitions.h>
@@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
 }
 
 static void __init
-fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_edb7211(struct tag *tags, char **cmdline)
 {
 	/*
 	 * Bank start addresses are not present in the information
@@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
 	 * Banks sizes _are_ present in the param block, but we're
 	 * not using that information yet.
 	 */
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = SZ_8M;
-	mi->bank[1].start = 0xc1000000;
-	mi->bank[1].size = SZ_8M;
-	mi->nr_banks = 2;
+	memblock_add(0xc0000000, SZ_8M);
+	memblock_add(0xc1000000, SZ_8M);
 }
 
 static void __init edb7211_init(void)
diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
index dd81b06..c1c6729 100644
--- a/arch/arm/mach-clps711x/board-p720t.c
+++ b/arch/arm/mach-clps711x/board-p720t.c
@@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
 };
 
 static void __init
-fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
+fixup_p720t(struct tag *tag, char **cmdline)
 {
 	/*
 	 * Our bootloader doesn't setup any tags (yet).
diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
index 9669cc0..de86ab6 100644
--- a/arch/arm/mach-footbridge/cats-hw.c
+++ b/arch/arm/mach-footbridge/cats-hw.c
@@ -76,7 +76,7 @@ __initcall(cats_hw_init);
  * hard reboots fail on early boards.
  */
 static void __init
-fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_cats(struct tag *tags, char **cmdline)
 {
 	screen_info.orig_video_lines  = 25;
 	screen_info.orig_video_points = 16;
diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
index eb1fa5c..cdee08c 100644
--- a/arch/arm/mach-footbridge/netwinder-hw.c
+++ b/arch/arm/mach-footbridge/netwinder-hw.c
@@ -620,7 +620,7 @@ __initcall(nw_hw_init);
  * the parameter page.
  */
 static void __init
-fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_netwinder(struct tag *tags, char **cmdline)
 {
 #ifdef CONFIG_ISAPNP
 	extern int isapnp_disable;
diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
index a775298..61bfe58 100644
--- a/arch/arm/mach-msm/board-halibut.c
+++ b/arch/arm/mach-msm/board-halibut.c
@@ -83,11 +83,6 @@ static void __init halibut_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init halibut_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
-{
-}
-
 static void __init halibut_map_io(void)
 {
 	msm_map_common_io();
@@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
 
 MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
 	.atag_offset	= 0x100,
-	.fixup		= halibut_fixup,
 	.map_io		= halibut_map_io,
 	.init_early	= halibut_init_early,
 	.init_irq	= halibut_init_irq,
diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
index 7d9981c..873c3ca 100644
--- a/arch/arm/mach-msm/board-mahimahi.c
+++ b/arch/arm/mach-msm/board-mahimahi.c
@@ -22,6 +22,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 2;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
-	mi->bank[0].size = (219*1024*1024);
-	mi->bank[1].start = MSM_HIGHMEM_BASE;
-	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
-	mi->bank[1].size = MSM_HIGHMEM_SIZE;
+	memblock_add(PHYS_OFFSET, 219*SZ_1M);
+	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
 }
 
 static void __init mahimahi_map_io(void)
diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 46de789..b621b23 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -40,8 +40,7 @@
 #include "proc_comm.h"
 #include "common.h"
 
-static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
-		struct meminfo *mi)
+static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
 {
 	for (; tag->hdr.size; tag = tag_next(tag))
 		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
index 3276051..e509679 100644
--- a/arch/arm/mach-msm/board-sapphire.c
+++ b/arch/arm/mach-msm/board-sapphire.c
@@ -35,6 +35,7 @@
 
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include "gpio_chip.h"
 #include "board-sapphire.h"
@@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
 	}
 };
 
-static void __init sapphire_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init sapphire_fixup(struct tag *tags, char **cmdline)
 {
 	int smi_sz = parse_tag_smi((const struct tag *)tags);
 
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	if (smi_sz == 32) {
-		mi->bank[0].size = (84*1024*1024);
+		memblock_add(PHYS_OFFSET, 84*SZ_1M);
 	} else if (smi_sz == 64) {
-		mi->bank[0].size = (101*1024*1024);
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 	} else {
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 		/* Give a default value when not get smi size */
 		smi_sz = 64;
-		mi->bank[0].size = (101*1024*1024);
 	}
 }
 
diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
index 015d544..58826cf 100644
--- a/arch/arm/mach-msm/board-trout.c
+++ b/arch/arm/mach-msm/board-trout.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/clkdev.h>
+#include <linux/memblock.h>
 
 #include <asm/system_info.h>
 #include <asm/mach-types.h>
@@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
 	msm_init_irq();
 }
 
-static void __init trout_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init trout_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].size = (101*1024*1024);
+	memblock_add(PHYS_OFFSET, 101*SZ_1M);
 }
 
 static void __init trout_init(void)
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 3f1de11..6bbb7b5 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
  * Many orion-based systems have buggy bootloader implementations.
  * This is a common fixup for bogus memory tags.
  */
-void __init tag_fixup_mem32(struct tag *t, char **from,
-			    struct meminfo *meminfo)
+void __init tag_fixup_mem32(struct tag *t, char **from)
 {
 	for (; t->hdr.size; t = tag_next(t))
 		if (t->hdr.tag == ATAG_MEM &&
diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
index f565f99..175ec4c 100644
--- a/arch/arm/mach-orion5x/common.h
+++ b/arch/arm/mach-orion5x/common.h
@@ -71,9 +71,8 @@ void edmini_v2_init(void);
 static inline void edmini_v2_init(void) {};
 #endif
 
-struct meminfo;
 struct tag;
-extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
+extern void __init tag_fixup_mem32(struct tag *, char **);
 
 /*****************************************************************************
  * Helpers to access Orion registers
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index 584439bf..4d3588d 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
 	cm_x300_init_bl();
 }
 
-static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
+static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
 {
 	/* Make sure that mi->bank[0].start = PHYS_ADDR */
 	for (; tags->hdr.size; tags = tag_next(tags))
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index f162f1b..a763744 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -33,6 +33,7 @@
 #include <linux/mtd/sharpsl.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/module.h>
+#include <linux/memblock.h>
 #include <video/w100fb.h>
 
 #include <asm/setup.h>
@@ -713,16 +714,13 @@ static void __init corgi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_corgi(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init fixup_corgi(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_corgi())
-		mi->bank[0].size = (32*1024*1024);
+		memblock_add(0xa0000000, SZ_32M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_CORGI
diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
index 8280ebca..cfb8641 100644
--- a/arch/arm/mach-pxa/eseries.c
+++ b/arch/arm/mach-pxa/eseries.c
@@ -21,6 +21,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/memblock.h>
 
 #include <video/w100fb.h>
 
@@ -41,14 +42,12 @@
 #include "clock.h"
 
 /* Only e800 has 128MB RAM */
-void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
+void __init eseries_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_e800())
-		mi->bank[0].size = (128*1024*1024);
+		memblock_add(0xa0000000, SZ_128M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 struct gpio_vbus_mach_info e7xx_udc_info = {
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index aedf053..1319916 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -29,6 +29,7 @@
 #include <linux/spi/ads7846.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -456,13 +457,10 @@ static void __init poodle_init(void)
 	poodle_init_spi();
 }
 
-static void __init fixup_poodle(struct tag *tags, char **cmdline,
-				struct meminfo *mi)
+static void __init fixup_poodle(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (32*1024*1024);
+	memblock_add(0xa0000000, SZ_32M);
 }
 
 MACHINE_START(POODLE, "SHARP Poodle")
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 0b11c1a..840c3a4 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -971,13 +972,10 @@ static void __init spitz_init(void)
 	spitz_i2c_init();
 }
 
-static void __init spitz_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init spitz_fixup(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks = 1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_SPITZ
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index ef5557b..c158a6e 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -37,6 +37,7 @@
 #include <linux/i2c/pxa-i2c.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -960,13 +961,10 @@ static void __init tosa_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_tosa(struct tag *tags, char **cmdline,
-			      struct meminfo *mi)
+static void __init fixup_tosa(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 MACHINE_START(TOSA, "SHARP Tosa")
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 1d5ee5c..c2fae3a 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -31,6 +31,7 @@
 #include <linux/amba/mmci.h>
 #include <linux/gfp.h>
 #include <linux/mtd/physmap.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
 /*
  * Setup the memory banks.
  */
-void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
+void realview_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
 	 * Half of this is mirrored at 0.
 	 */
 #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
-	meminfo->bank[0].start = 0x70000000;
-	meminfo->bank[0].size = SZ_512M;
-	meminfo->nr_banks = 1;
+	memblock_add(0x70000000, SZ_512M);
 #else
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_256M);
 #endif
 }
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 602ca5e..844946d 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
 extern int realview_eth_register(const char *name, struct resource *res);
 extern int realview_usb_register(struct resource *res);
 extern void realview_init_early(void);
-extern void realview_fixup(struct tag *tags, char **from,
-			   struct meminfo *meminfo);
+extern void realview_fixup(struct tag *tags, char **from);
 
 extern struct smp_operations realview_smp_ops;
 extern void realview_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index c5eade7..6abf6a0 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -32,6 +32,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
 	dsb();
 }
 
-static void realview_pb1176_fixup(struct tag *tags, char **from,
-				  struct meminfo *meminfo)
+static void realview_pb1176_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * RealView PB1176 only has 128MB of RAM mapped at 0.
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_128M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_128M);
 }
 
 static void __init realview_pb1176_init(void)
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 9d75493..60d322a 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -29,6 +29,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/irq.h>
 #include <asm/mach-types.h>
@@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
 	realview_pbx_twd_init();
 }
 
-static void realview_pbx_fixup(struct tag *tags, char **from,
-			       struct meminfo *meminfo)
+static void realview_pbx_fixup(struct tag *tags, char **from)
 {
 #ifdef CONFIG_SPARSEMEM
 	/*
 	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
 	 * asm/mach/memory.h for more information).
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->bank[1].start = 0x20000000;
-	meminfo->bank[1].size = SZ_512M;
-	meminfo->bank[2].start = 0x80000000;
-	meminfo->bank[2].size = SZ_256M;
-	meminfo->nr_banks = 3;
+
+	memblock_add(0, SZ_256M);
+	memblock_add(0x20000000, SZ_512M);
+	memblock_add(0x80000000, SZ_256M);
 #else
-	realview_fixup(tags, from, meminfo);
+	realview_fixup(tags, from);
 #endif
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
index f5bc721..0551758 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
@@ -21,6 +21,7 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
index f7ec9c5..aa550f5 100644
--- a/arch/arm/mach-s3c24xx/mach-vstms.c
+++ b/arch/arm/mach-s3c24xx/mach-vstms.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init vstms_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init vstms_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
index 8443a27..7dd894e 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
 }
 
 static void __init
-fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_assabet(struct tag *tags, char **cmdline)
 {
 	/* This must be done before any call to machine_has_neponset() */
 	map_sa1100_gpio_regs();
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 42fc139..a62dadd 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
  * initialization functions, as well as show_mem() for the skipping
  * of holes in the memory map.  It is populated by arm_add_memory().
  */
-struct meminfo meminfo;
-
 void show_mem(unsigned int filter)
 {
 	int free = 0, total = 0, reserved = 0;
-	int shared = 0, cached = 0, slab = 0, i;
-	struct meminfo * mi = &meminfo;
+	int shared = 0, cached = 0, slab = 0;
+	struct memblock_region *reg;
 
 	printk("Mem-info:\n");
 	show_free_areas(filter);
 
-	for_each_bank (i, mi) {
-		struct membank *bank = &mi->bank[i];
+	for_each_memblock (memory, reg) {
 		unsigned int pfn1, pfn2;
 		struct page *page, *end;
 
-		pfn1 = bank_pfn_start(bank);
-		pfn2 = bank_pfn_end(bank);
+		pfn1 = memblock_region_memory_base_pfn(reg);
+		pfn2 = memblock_region_memory_end_pfn(reg);
 
 		page = pfn_to_page(pfn1);
 		end  = pfn_to_page(pfn2 - 1) + 1;
@@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
 static void __init find_limits(unsigned long *min, unsigned long *max_low,
 			       unsigned long *max_high)
 {
-	struct meminfo *mi = &meminfo;
-	int i;
-
-	/* This assumes the meminfo array is properly sorted */
-	*min = bank_pfn_start(&mi->bank[0]);
-	for_each_bank (i, mi)
-		if (mi->bank[i].highmem)
-				break;
-	*max_low = bank_pfn_end(&mi->bank[i - 1]);
-	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
+	*max_low = PFN_DOWN(memblock_get_current_limit());
+	*min = PFN_UP(memblock_start_of_DRAM());
+	*max_high = PFN_DOWN(memblock_end_of_DRAM());
 }
 
 #ifdef CONFIG_ZONE_DMA
@@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
 	return phys;
 }
 
-void __init arm_memblock_init(struct meminfo *mi,
-	const struct machine_desc *mdesc)
+void __init arm_memblock_init(const struct machine_desc *mdesc)
 {
-	int i;
-
-	for (i = 0; i < mi->nr_banks; i++)
-		memblock_add(mi->bank[i].start, mi->bank[i].size);
-
 	/* Register the kernel text, kernel data and initrd with memblock. */
 #ifdef CONFIG_XIP_KERNEL
 	memblock_reserve(__pa(_sdata), _end - _sdata);
@@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 /*
  * The mem_map array can get very big.  Free the unused area of the memory map.
  */
-static void __init free_unused_memmap(struct meminfo *mi)
+static void __init free_unused_memmap(void)
 {
-	unsigned long bank_start, prev_bank_end = 0;
-	unsigned int i;
+	unsigned long start, prev_end = 0;
+	struct memblock_region *reg;
 
 	/*
 	 * This relies on each bank being in address order.
 	 * The banks are sorted previously in bootmem_init().
 	 */
-	for_each_bank(i, mi) {
-		struct membank *bank = &mi->bank[i];
-
-		bank_start = bank_pfn_start(bank);
+	for_each_memblock(memory, reg) {
+		start = __phys_to_pfn(reg->base);
 
 #ifdef CONFIG_SPARSEMEM
 		/*
 		 * Take care not to free memmap entries that don't exist
 		 * due to SPARSEMEM sections which aren't present.
 		 */
-		bank_start = min(bank_start,
-				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
+		start = min(start,
+				 ALIGN(prev_end, PAGES_PER_SECTION));
 #else
 		/*
 		 * Align down here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank start aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
+		start = round_down(start, MAX_ORDER_NR_PAGES);
 #endif
 		/*
 		 * If we had a previous bank, and there is a space
 		 * between the current bank and the previous, free it.
 		 */
-		if (prev_bank_end && prev_bank_end < bank_start)
-			free_memmap(prev_bank_end, bank_start);
+		if (prev_end && prev_end < start)
+			free_memmap(prev_end, start);
 
 		/*
 		 * Align up here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank end aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
+		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
+				 MAX_ORDER_NR_PAGES);
 	}
 
 #ifdef CONFIG_SPARSEMEM
-	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
-		free_memmap(prev_bank_end,
-			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
+	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
+		free_memmap(prev_end,
+			    ALIGN(prev_end, PAGES_PER_SECTION));
 #endif
 }
 
@@ -536,7 +519,7 @@ void __init mem_init(void)
 	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
 
 	/* this will put all unused low memory onto the freelists */
-	free_unused_memmap(&meminfo);
+	free_unused_memmap();
 	free_all_bootmem();
 
 #ifdef CONFIG_SA1111
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 4f08c13..23433ef 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
 void __init sanity_check_meminfo(void)
 {
 	phys_addr_t memblock_limit = 0;
-	int i, j, highmem = 0;
+	int highmem = 0;
 	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
+	struct memblock_region *reg;
 
-	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
-		struct membank *bank = &meminfo.bank[j];
-		phys_addr_t size_limit;
-
-		*bank = meminfo.bank[i];
-		size_limit = bank->size;
+	for_each_memblock(memory, reg) {
+		phys_addr_t block_start = reg->base;
+		phys_addr_t block_end = reg->base + reg->size;
+		phys_addr_t size_limit = reg->size;
 
-		if (bank->start >= vmalloc_limit)
+		if (reg->base >= vmalloc_limit)
 			highmem = 1;
 		else
-			size_limit = vmalloc_limit - bank->start;
+			size_limit = vmalloc_limit - reg->base;
 
-		bank->highmem = highmem;
 
-#ifdef CONFIG_HIGHMEM
-		/*
-		 * Split those memory banks which are partially overlapping
-		 * the vmalloc area greatly simplifying things later.
-		 */
-		if (!highmem && bank->size > size_limit) {
-			if (meminfo.nr_banks >= NR_BANKS) {
-				printk(KERN_CRIT "NR_BANKS too low, "
-						 "ignoring high memory\n");
-			} else {
-				memmove(bank + 1, bank,
-					(meminfo.nr_banks - i) * sizeof(*bank));
-				meminfo.nr_banks++;
-				i++;
-				bank[1].size -= size_limit;
-				bank[1].start = vmalloc_limit;
-				bank[1].highmem = highmem = 1;
-				j++;
+		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
+
+			if (highmem) {
+				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
+					&block_start, &block_end);
+				memblock_remove(block_start, block_end);
+				continue;
 			}
-			bank->size = size_limit;
-		}
-#else
-		/*
-		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
-		 */
-		if (highmem) {
-			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
-			       "(!CONFIG_HIGHMEM).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1);
-			continue;
-		}
 
-		/*
-		 * Check whether this memory bank would partially overlap
-		 * the vmalloc area.
-		 */
-		if (bank->size > size_limit) {
-			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
-			       "to -%.8llx (vmalloc region overlap).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1,
-			       (unsigned long long)bank->start + size_limit - 1);
-			bank->size = size_limit;
+			if (reg->size > size_limit) {
+				phys_addr_t overlap_size = reg->size - size_limit;
+
+				pr_notice("Truncating RAM at %pa-%pa to -%pa",
+					&block_start, &block_end, &overlap_size);
+				memblock_remove(vmalloc_limit, overlap_size);
+				block_end = vmalloc_limit;
+			}
 		}
-#endif
-		if (!bank->highmem) {
-			phys_addr_t bank_end = bank->start + bank->size;
 
-			if (bank_end > arm_lowmem_limit)
-				arm_lowmem_limit = bank_end;
+		if (!highmem) {
+			if (block_end > arm_lowmem_limit)
+				arm_lowmem_limit = reg->base + size_limit;
+
 
 			/*
 			 * Find the first non-section-aligned page, and point
@@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
 			 * occurs before any free memory is mapped.
 			 */
 			if (!memblock_limit) {
-				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
-					memblock_limit = bank->start;
-				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
-					memblock_limit = bank_end;
+				if (!IS_ALIGNED(block_start, SECTION_SIZE))
+					memblock_limit = block_start;
+				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
+					memblock_limit = block_end;
 			}
-		}
-		j++;
-	}
-#ifdef CONFIG_HIGHMEM
-	if (highmem) {
-		const char *reason = NULL;
 
-		if (cache_is_vipt_aliasing()) {
-			/*
-			 * Interactions between kmap and other mappings
-			 * make highmem support with aliasing VIPT caches
-			 * rather difficult.
-			 */
-			reason = "with VIPT aliasing cache";
-		}
-		if (reason) {
-			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
-				reason);
-			while (j > 0 && meminfo.bank[j - 1].highmem)
-				j--;
 		}
+
 	}
-#endif
-	meminfo.nr_banks = j;
+
 	high_memory = __va(arm_lowmem_limit - 1) + 1;
 
 	/*
-- 
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hosted by The Linux Foundation

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^ permalink raw reply related	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-11 21:14   ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: Laura Abbott, linux-kernel, linux-arm-msm, Leif Lindholm,
	Grygorii Strashko, Catalin Marinas, Rob Herring, Ard Biesheuvel,
	Will Deacon, Nicolas Pitre, Santosh Shilimkar, linux-mm,
	Andrew Morton, Courtney Cavin, Marek Szyprowski, Grant Likely

memblock is now fully integrated into the kernel and is the prefered
method for tracking memory. Rather than reinvent the wheel with
meminfo, migrate to using memblock directly instead of meminfo as
an intermediate.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 33 files changed, 136 insertions(+), 291 deletions(-)

diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 17a3fa2..c43473a 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -14,7 +14,6 @@
 #include <linux/reboot.h>
 
 struct tag;
-struct meminfo;
 struct pt_regs;
 struct smp_operations;
 #ifdef CONFIG_SMP
@@ -47,8 +46,7 @@ struct machine_desc {
 	enum reboot_mode	reboot_mode;	/* default restart mode	*/
 	struct smp_operations	*smp;		/* SMP operations	*/
 	bool			(*smp_init)(void);
-	void			(*fixup)(struct tag *, char **,
-					 struct meminfo *);
+	void			(*fixup)(struct tag *, char **);
 	void			(*init_meminfo)(void);
 	void			(*reserve)(void);/* reserve mem blocks	*/
 	void			(*map_io)(void);/* IO mapping function	*/
diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
index c2f5102..bf47a6c 100644
--- a/arch/arm/include/asm/memblock.h
+++ b/arch/arm/include/asm/memblock.h
@@ -1,10 +1,9 @@
 #ifndef _ASM_ARM_MEMBLOCK_H
 #define _ASM_ARM_MEMBLOCK_H
 
-struct meminfo;
 struct machine_desc;
 
-void arm_memblock_init(struct meminfo *, const struct machine_desc *);
+void arm_memblock_init(const struct machine_desc *);
 phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
 
 #endif
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index 8d6a089..0196091 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
  */
 #define NR_BANKS	CONFIG_ARM_NR_BANKS
 
-struct membank {
-	phys_addr_t start;
-	phys_addr_t size;
-	unsigned int highmem;
-};
-
-struct meminfo {
-	int nr_banks;
-	struct membank bank[NR_BANKS];
-};
-
-extern struct meminfo meminfo;
-
-#define for_each_bank(iter,mi)				\
-	for (iter = 0; iter < (mi)->nr_banks; iter++)
-
-#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
-#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
-#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
-#define bank_phys_start(bank)	(bank)->start
-#define bank_phys_end(bank)	((bank)->start + (bank)->size)
-#define bank_phys_size(bank)	(bank)->size
-
 extern int arm_add_memory(u64 start, u64 size);
 extern void early_print(const char *str, ...);
 extern void dump_machine_table(void);
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index 8c14de8..7807ef5 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/root_dev.h>
 #include <linux/screen_info.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/system_info.h>
@@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
 	}
 
 	if (mdesc->fixup)
-		mdesc->fixup(tags, &from, &meminfo);
+		mdesc->fixup(tags, &from);
 
 	if (tags->hdr.tag == ATAG_CORE) {
-		if (meminfo.nr_banks != 0)
+		if (memblock_phys_mem_size())
 			squash_mem_tags(tags);
 		save_atags(tags);
 		parse_tags(tags);
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index f751714..398cd5f 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -26,11 +26,6 @@
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 
-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	arm_add_memory(base, size);
-}
-
 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
 	return memblock_virt_alloc(size, align);
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1e8b030..7dd83d0 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -625,15 +625,8 @@ void __init dump_machine_table(void)
 
 int __init arm_add_memory(u64 start, u64 size)
 {
-	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
 	u64 aligned_start;
 
-	if (meminfo.nr_banks >= NR_BANKS) {
-		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
-			(long long)start);
-		return -EINVAL;
-	}
-
 	/*
 	 * Ensure that start/size are aligned to a page boundary.
 	 * Size is appropriately rounded down, start is rounded up.
@@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
 		aligned_start = PHYS_OFFSET;
 	}
 
-	bank->start = aligned_start;
-	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
+	start = aligned_start;
+	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
 
 	/*
 	 * Check whether this memory region has non-zero size or
 	 * invalid node number.
 	 */
-	if (bank->size == 0)
+	if (size == 0)
 		return -EINVAL;
 
-	meminfo.nr_banks++;
+	memblock_add(start, size);
 	return 0;
 }
 
@@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
  * Pick out the memory size.  We look for mem=size@start,
  * where start and size are "size[KkMm]"
  */
+
 static int __init early_mem(char *p)
 {
 	static int usermem __initdata = 0;
@@ -706,7 +700,8 @@ static int __init early_mem(char *p)
 	 */
 	if (usermem == 0) {
 		usermem = 1;
-		meminfo.nr_banks = 0;
+		memblock_remove(memblock_start_of_DRAM(),
+			memblock_end_of_DRAM() - memblock_start_of_DRAM());
 	}
 
 	start = PHYS_OFFSET;
@@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
 static inline void reserve_crashkernel(void) {}
 #endif /* CONFIG_KEXEC */
 
-static int __init meminfo_cmp(const void *_a, const void *_b)
-{
-	const struct membank *a = _a, *b = _b;
-	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
-	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
-}
-
 void __init hyp_mode_check(void)
 {
 #ifdef CONFIG_ARM_VIRT_EXT
@@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
-	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
-
 	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
 	setup_dma_zone(mdesc);
 	sanity_check_meminfo();
-	arm_memblock_init(&meminfo, mdesc);
+	arm_memblock_init(mdesc);
 
 	paging_init(mdesc);
 	request_standard_resources(mdesc);
diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
index b476424..4d04b91 100644
--- a/arch/arm/mach-clps711x/board-clep7312.c
+++ b/arch/arm/mach-clps711x/board-clep7312.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/string.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -26,11 +27,9 @@
 #include "common.h"
 
 static void __init
-fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_clep7312(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = 0x01000000;
+	memblock_add(0xc0000000, 0x01000000);
 }
 
 MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
index fe6184e..b617aa2 100644
--- a/arch/arm/mach-clps711x/board-edb7211.c
+++ b/arch/arm/mach-clps711x/board-edb7211.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/partitions.h>
@@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
 }
 
 static void __init
-fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_edb7211(struct tag *tags, char **cmdline)
 {
 	/*
 	 * Bank start addresses are not present in the information
@@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
 	 * Banks sizes _are_ present in the param block, but we're
 	 * not using that information yet.
 	 */
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = SZ_8M;
-	mi->bank[1].start = 0xc1000000;
-	mi->bank[1].size = SZ_8M;
-	mi->nr_banks = 2;
+	memblock_add(0xc0000000, SZ_8M);
+	memblock_add(0xc1000000, SZ_8M);
 }
 
 static void __init edb7211_init(void)
diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
index dd81b06..c1c6729 100644
--- a/arch/arm/mach-clps711x/board-p720t.c
+++ b/arch/arm/mach-clps711x/board-p720t.c
@@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
 };
 
 static void __init
-fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
+fixup_p720t(struct tag *tag, char **cmdline)
 {
 	/*
 	 * Our bootloader doesn't setup any tags (yet).
diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
index 9669cc0..de86ab6 100644
--- a/arch/arm/mach-footbridge/cats-hw.c
+++ b/arch/arm/mach-footbridge/cats-hw.c
@@ -76,7 +76,7 @@ __initcall(cats_hw_init);
  * hard reboots fail on early boards.
  */
 static void __init
-fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_cats(struct tag *tags, char **cmdline)
 {
 	screen_info.orig_video_lines  = 25;
 	screen_info.orig_video_points = 16;
diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
index eb1fa5c..cdee08c 100644
--- a/arch/arm/mach-footbridge/netwinder-hw.c
+++ b/arch/arm/mach-footbridge/netwinder-hw.c
@@ -620,7 +620,7 @@ __initcall(nw_hw_init);
  * the parameter page.
  */
 static void __init
-fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_netwinder(struct tag *tags, char **cmdline)
 {
 #ifdef CONFIG_ISAPNP
 	extern int isapnp_disable;
diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
index a775298..61bfe58 100644
--- a/arch/arm/mach-msm/board-halibut.c
+++ b/arch/arm/mach-msm/board-halibut.c
@@ -83,11 +83,6 @@ static void __init halibut_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init halibut_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
-{
-}
-
 static void __init halibut_map_io(void)
 {
 	msm_map_common_io();
@@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
 
 MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
 	.atag_offset	= 0x100,
-	.fixup		= halibut_fixup,
 	.map_io		= halibut_map_io,
 	.init_early	= halibut_init_early,
 	.init_irq	= halibut_init_irq,
diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
index 7d9981c..873c3ca 100644
--- a/arch/arm/mach-msm/board-mahimahi.c
+++ b/arch/arm/mach-msm/board-mahimahi.c
@@ -22,6 +22,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 2;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
-	mi->bank[0].size = (219*1024*1024);
-	mi->bank[1].start = MSM_HIGHMEM_BASE;
-	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
-	mi->bank[1].size = MSM_HIGHMEM_SIZE;
+	memblock_add(PHYS_OFFSET, 219*SZ_1M);
+	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
 }
 
 static void __init mahimahi_map_io(void)
diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 46de789..b621b23 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -40,8 +40,7 @@
 #include "proc_comm.h"
 #include "common.h"
 
-static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
-		struct meminfo *mi)
+static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
 {
 	for (; tag->hdr.size; tag = tag_next(tag))
 		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
index 3276051..e509679 100644
--- a/arch/arm/mach-msm/board-sapphire.c
+++ b/arch/arm/mach-msm/board-sapphire.c
@@ -35,6 +35,7 @@
 
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include "gpio_chip.h"
 #include "board-sapphire.h"
@@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
 	}
 };
 
-static void __init sapphire_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init sapphire_fixup(struct tag *tags, char **cmdline)
 {
 	int smi_sz = parse_tag_smi((const struct tag *)tags);
 
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	if (smi_sz == 32) {
-		mi->bank[0].size = (84*1024*1024);
+		memblock_add(PHYS_OFFSET, 84*SZ_1M);
 	} else if (smi_sz == 64) {
-		mi->bank[0].size = (101*1024*1024);
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 	} else {
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 		/* Give a default value when not get smi size */
 		smi_sz = 64;
-		mi->bank[0].size = (101*1024*1024);
 	}
 }
 
diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
index 015d544..58826cf 100644
--- a/arch/arm/mach-msm/board-trout.c
+++ b/arch/arm/mach-msm/board-trout.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/clkdev.h>
+#include <linux/memblock.h>
 
 #include <asm/system_info.h>
 #include <asm/mach-types.h>
@@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
 	msm_init_irq();
 }
 
-static void __init trout_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init trout_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].size = (101*1024*1024);
+	memblock_add(PHYS_OFFSET, 101*SZ_1M);
 }
 
 static void __init trout_init(void)
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 3f1de11..6bbb7b5 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
  * Many orion-based systems have buggy bootloader implementations.
  * This is a common fixup for bogus memory tags.
  */
-void __init tag_fixup_mem32(struct tag *t, char **from,
-			    struct meminfo *meminfo)
+void __init tag_fixup_mem32(struct tag *t, char **from)
 {
 	for (; t->hdr.size; t = tag_next(t))
 		if (t->hdr.tag == ATAG_MEM &&
diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
index f565f99..175ec4c 100644
--- a/arch/arm/mach-orion5x/common.h
+++ b/arch/arm/mach-orion5x/common.h
@@ -71,9 +71,8 @@ void edmini_v2_init(void);
 static inline void edmini_v2_init(void) {};
 #endif
 
-struct meminfo;
 struct tag;
-extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
+extern void __init tag_fixup_mem32(struct tag *, char **);
 
 /*****************************************************************************
  * Helpers to access Orion registers
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index 584439bf..4d3588d 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
 	cm_x300_init_bl();
 }
 
-static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
+static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
 {
 	/* Make sure that mi->bank[0].start = PHYS_ADDR */
 	for (; tags->hdr.size; tags = tag_next(tags))
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index f162f1b..a763744 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -33,6 +33,7 @@
 #include <linux/mtd/sharpsl.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/module.h>
+#include <linux/memblock.h>
 #include <video/w100fb.h>
 
 #include <asm/setup.h>
@@ -713,16 +714,13 @@ static void __init corgi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_corgi(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init fixup_corgi(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_corgi())
-		mi->bank[0].size = (32*1024*1024);
+		memblock_add(0xa0000000, SZ_32M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_CORGI
diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
index 8280ebca..cfb8641 100644
--- a/arch/arm/mach-pxa/eseries.c
+++ b/arch/arm/mach-pxa/eseries.c
@@ -21,6 +21,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/memblock.h>
 
 #include <video/w100fb.h>
 
@@ -41,14 +42,12 @@
 #include "clock.h"
 
 /* Only e800 has 128MB RAM */
-void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
+void __init eseries_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_e800())
-		mi->bank[0].size = (128*1024*1024);
+		memblock_add(0xa0000000, SZ_128M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 struct gpio_vbus_mach_info e7xx_udc_info = {
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index aedf053..1319916 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -29,6 +29,7 @@
 #include <linux/spi/ads7846.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -456,13 +457,10 @@ static void __init poodle_init(void)
 	poodle_init_spi();
 }
 
-static void __init fixup_poodle(struct tag *tags, char **cmdline,
-				struct meminfo *mi)
+static void __init fixup_poodle(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (32*1024*1024);
+	memblock_add(0xa0000000, SZ_32M);
 }
 
 MACHINE_START(POODLE, "SHARP Poodle")
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 0b11c1a..840c3a4 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -971,13 +972,10 @@ static void __init spitz_init(void)
 	spitz_i2c_init();
 }
 
-static void __init spitz_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init spitz_fixup(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks = 1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_SPITZ
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index ef5557b..c158a6e 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -37,6 +37,7 @@
 #include <linux/i2c/pxa-i2c.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -960,13 +961,10 @@ static void __init tosa_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_tosa(struct tag *tags, char **cmdline,
-			      struct meminfo *mi)
+static void __init fixup_tosa(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 MACHINE_START(TOSA, "SHARP Tosa")
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 1d5ee5c..c2fae3a 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -31,6 +31,7 @@
 #include <linux/amba/mmci.h>
 #include <linux/gfp.h>
 #include <linux/mtd/physmap.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
 /*
  * Setup the memory banks.
  */
-void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
+void realview_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
 	 * Half of this is mirrored at 0.
 	 */
 #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
-	meminfo->bank[0].start = 0x70000000;
-	meminfo->bank[0].size = SZ_512M;
-	meminfo->nr_banks = 1;
+	memblock_add(0x70000000, SZ_512M);
 #else
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_256M);
 #endif
 }
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 602ca5e..844946d 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
 extern int realview_eth_register(const char *name, struct resource *res);
 extern int realview_usb_register(struct resource *res);
 extern void realview_init_early(void);
-extern void realview_fixup(struct tag *tags, char **from,
-			   struct meminfo *meminfo);
+extern void realview_fixup(struct tag *tags, char **from);
 
 extern struct smp_operations realview_smp_ops;
 extern void realview_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index c5eade7..6abf6a0 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -32,6 +32,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
 	dsb();
 }
 
-static void realview_pb1176_fixup(struct tag *tags, char **from,
-				  struct meminfo *meminfo)
+static void realview_pb1176_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * RealView PB1176 only has 128MB of RAM mapped at 0.
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_128M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_128M);
 }
 
 static void __init realview_pb1176_init(void)
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 9d75493..60d322a 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -29,6 +29,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/irq.h>
 #include <asm/mach-types.h>
@@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
 	realview_pbx_twd_init();
 }
 
-static void realview_pbx_fixup(struct tag *tags, char **from,
-			       struct meminfo *meminfo)
+static void realview_pbx_fixup(struct tag *tags, char **from)
 {
 #ifdef CONFIG_SPARSEMEM
 	/*
 	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
 	 * asm/mach/memory.h for more information).
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->bank[1].start = 0x20000000;
-	meminfo->bank[1].size = SZ_512M;
-	meminfo->bank[2].start = 0x80000000;
-	meminfo->bank[2].size = SZ_256M;
-	meminfo->nr_banks = 3;
+
+	memblock_add(0, SZ_256M);
+	memblock_add(0x20000000, SZ_512M);
+	memblock_add(0x80000000, SZ_256M);
 #else
-	realview_fixup(tags, from, meminfo);
+	realview_fixup(tags, from);
 #endif
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
index f5bc721..0551758 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
@@ -21,6 +21,7 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
index f7ec9c5..aa550f5 100644
--- a/arch/arm/mach-s3c24xx/mach-vstms.c
+++ b/arch/arm/mach-s3c24xx/mach-vstms.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init vstms_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init vstms_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
index 8443a27..7dd894e 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
 }
 
 static void __init
-fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_assabet(struct tag *tags, char **cmdline)
 {
 	/* This must be done before any call to machine_has_neponset() */
 	map_sa1100_gpio_regs();
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 42fc139..a62dadd 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
  * initialization functions, as well as show_mem() for the skipping
  * of holes in the memory map.  It is populated by arm_add_memory().
  */
-struct meminfo meminfo;
-
 void show_mem(unsigned int filter)
 {
 	int free = 0, total = 0, reserved = 0;
-	int shared = 0, cached = 0, slab = 0, i;
-	struct meminfo * mi = &meminfo;
+	int shared = 0, cached = 0, slab = 0;
+	struct memblock_region *reg;
 
 	printk("Mem-info:\n");
 	show_free_areas(filter);
 
-	for_each_bank (i, mi) {
-		struct membank *bank = &mi->bank[i];
+	for_each_memblock (memory, reg) {
 		unsigned int pfn1, pfn2;
 		struct page *page, *end;
 
-		pfn1 = bank_pfn_start(bank);
-		pfn2 = bank_pfn_end(bank);
+		pfn1 = memblock_region_memory_base_pfn(reg);
+		pfn2 = memblock_region_memory_end_pfn(reg);
 
 		page = pfn_to_page(pfn1);
 		end  = pfn_to_page(pfn2 - 1) + 1;
@@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
 static void __init find_limits(unsigned long *min, unsigned long *max_low,
 			       unsigned long *max_high)
 {
-	struct meminfo *mi = &meminfo;
-	int i;
-
-	/* This assumes the meminfo array is properly sorted */
-	*min = bank_pfn_start(&mi->bank[0]);
-	for_each_bank (i, mi)
-		if (mi->bank[i].highmem)
-				break;
-	*max_low = bank_pfn_end(&mi->bank[i - 1]);
-	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
+	*max_low = PFN_DOWN(memblock_get_current_limit());
+	*min = PFN_UP(memblock_start_of_DRAM());
+	*max_high = PFN_DOWN(memblock_end_of_DRAM());
 }
 
 #ifdef CONFIG_ZONE_DMA
@@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
 	return phys;
 }
 
-void __init arm_memblock_init(struct meminfo *mi,
-	const struct machine_desc *mdesc)
+void __init arm_memblock_init(const struct machine_desc *mdesc)
 {
-	int i;
-
-	for (i = 0; i < mi->nr_banks; i++)
-		memblock_add(mi->bank[i].start, mi->bank[i].size);
-
 	/* Register the kernel text, kernel data and initrd with memblock. */
 #ifdef CONFIG_XIP_KERNEL
 	memblock_reserve(__pa(_sdata), _end - _sdata);
@@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 /*
  * The mem_map array can get very big.  Free the unused area of the memory map.
  */
-static void __init free_unused_memmap(struct meminfo *mi)
+static void __init free_unused_memmap(void)
 {
-	unsigned long bank_start, prev_bank_end = 0;
-	unsigned int i;
+	unsigned long start, prev_end = 0;
+	struct memblock_region *reg;
 
 	/*
 	 * This relies on each bank being in address order.
 	 * The banks are sorted previously in bootmem_init().
 	 */
-	for_each_bank(i, mi) {
-		struct membank *bank = &mi->bank[i];
-
-		bank_start = bank_pfn_start(bank);
+	for_each_memblock(memory, reg) {
+		start = __phys_to_pfn(reg->base);
 
 #ifdef CONFIG_SPARSEMEM
 		/*
 		 * Take care not to free memmap entries that don't exist
 		 * due to SPARSEMEM sections which aren't present.
 		 */
-		bank_start = min(bank_start,
-				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
+		start = min(start,
+				 ALIGN(prev_end, PAGES_PER_SECTION));
 #else
 		/*
 		 * Align down here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank start aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
+		start = round_down(start, MAX_ORDER_NR_PAGES);
 #endif
 		/*
 		 * If we had a previous bank, and there is a space
 		 * between the current bank and the previous, free it.
 		 */
-		if (prev_bank_end && prev_bank_end < bank_start)
-			free_memmap(prev_bank_end, bank_start);
+		if (prev_end && prev_end < start)
+			free_memmap(prev_end, start);
 
 		/*
 		 * Align up here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank end aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
+		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
+				 MAX_ORDER_NR_PAGES);
 	}
 
 #ifdef CONFIG_SPARSEMEM
-	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
-		free_memmap(prev_bank_end,
-			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
+	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
+		free_memmap(prev_end,
+			    ALIGN(prev_end, PAGES_PER_SECTION));
 #endif
 }
 
@@ -536,7 +519,7 @@ void __init mem_init(void)
 	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
 
 	/* this will put all unused low memory onto the freelists */
-	free_unused_memmap(&meminfo);
+	free_unused_memmap();
 	free_all_bootmem();
 
 #ifdef CONFIG_SA1111
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 4f08c13..23433ef 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
 void __init sanity_check_meminfo(void)
 {
 	phys_addr_t memblock_limit = 0;
-	int i, j, highmem = 0;
+	int highmem = 0;
 	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
+	struct memblock_region *reg;
 
-	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
-		struct membank *bank = &meminfo.bank[j];
-		phys_addr_t size_limit;
-
-		*bank = meminfo.bank[i];
-		size_limit = bank->size;
+	for_each_memblock(memory, reg) {
+		phys_addr_t block_start = reg->base;
+		phys_addr_t block_end = reg->base + reg->size;
+		phys_addr_t size_limit = reg->size;
 
-		if (bank->start >= vmalloc_limit)
+		if (reg->base >= vmalloc_limit)
 			highmem = 1;
 		else
-			size_limit = vmalloc_limit - bank->start;
+			size_limit = vmalloc_limit - reg->base;
 
-		bank->highmem = highmem;
 
-#ifdef CONFIG_HIGHMEM
-		/*
-		 * Split those memory banks which are partially overlapping
-		 * the vmalloc area greatly simplifying things later.
-		 */
-		if (!highmem && bank->size > size_limit) {
-			if (meminfo.nr_banks >= NR_BANKS) {
-				printk(KERN_CRIT "NR_BANKS too low, "
-						 "ignoring high memory\n");
-			} else {
-				memmove(bank + 1, bank,
-					(meminfo.nr_banks - i) * sizeof(*bank));
-				meminfo.nr_banks++;
-				i++;
-				bank[1].size -= size_limit;
-				bank[1].start = vmalloc_limit;
-				bank[1].highmem = highmem = 1;
-				j++;
+		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
+
+			if (highmem) {
+				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
+					&block_start, &block_end);
+				memblock_remove(block_start, block_end);
+				continue;
 			}
-			bank->size = size_limit;
-		}
-#else
-		/*
-		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
-		 */
-		if (highmem) {
-			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
-			       "(!CONFIG_HIGHMEM).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1);
-			continue;
-		}
 
-		/*
-		 * Check whether this memory bank would partially overlap
-		 * the vmalloc area.
-		 */
-		if (bank->size > size_limit) {
-			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
-			       "to -%.8llx (vmalloc region overlap).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1,
-			       (unsigned long long)bank->start + size_limit - 1);
-			bank->size = size_limit;
+			if (reg->size > size_limit) {
+				phys_addr_t overlap_size = reg->size - size_limit;
+
+				pr_notice("Truncating RAM at %pa-%pa to -%pa",
+					&block_start, &block_end, &overlap_size);
+				memblock_remove(vmalloc_limit, overlap_size);
+				block_end = vmalloc_limit;
+			}
 		}
-#endif
-		if (!bank->highmem) {
-			phys_addr_t bank_end = bank->start + bank->size;
 
-			if (bank_end > arm_lowmem_limit)
-				arm_lowmem_limit = bank_end;
+		if (!highmem) {
+			if (block_end > arm_lowmem_limit)
+				arm_lowmem_limit = reg->base + size_limit;
+
 
 			/*
 			 * Find the first non-section-aligned page, and point
@@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
 			 * occurs before any free memory is mapped.
 			 */
 			if (!memblock_limit) {
-				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
-					memblock_limit = bank->start;
-				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
-					memblock_limit = bank_end;
+				if (!IS_ALIGNED(block_start, SECTION_SIZE))
+					memblock_limit = block_start;
+				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
+					memblock_limit = block_end;
 			}
-		}
-		j++;
-	}
-#ifdef CONFIG_HIGHMEM
-	if (highmem) {
-		const char *reason = NULL;
 
-		if (cache_is_vipt_aliasing()) {
-			/*
-			 * Interactions between kmap and other mappings
-			 * make highmem support with aliasing VIPT caches
-			 * rather difficult.
-			 */
-			reason = "with VIPT aliasing cache";
-		}
-		if (reason) {
-			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
-				reason);
-			while (j > 0 && meminfo.bank[j - 1].highmem)
-				j--;
 		}
+
 	}
-#endif
-	meminfo.nr_banks = j;
+
 	high_memory = __va(arm_lowmem_limit - 1) + 1;
 
 	/*
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation


^ permalink raw reply related	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-11 21:14   ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-11 21:14 UTC (permalink / raw)
  To: linux-arm-kernel

memblock is now fully integrated into the kernel and is the prefered
method for tracking memory. Rather than reinvent the wheel with
meminfo, migrate to using memblock directly instead of meminfo as
an intermediate.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
---
 arch/arm/include/asm/mach/arch.h         |    4 +-
 arch/arm/include/asm/memblock.h          |    3 +-
 arch/arm/include/asm/setup.h             |   23 ------
 arch/arm/kernel/atags_parse.c            |    5 +-
 arch/arm/kernel/devtree.c                |    5 --
 arch/arm/kernel/setup.c                  |   30 ++------
 arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
 arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
 arch/arm/mach-clps711x/board-p720t.c     |    2 +-
 arch/arm/mach-footbridge/cats-hw.c       |    2 +-
 arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
 arch/arm/mach-msm/board-halibut.c        |    6 --
 arch/arm/mach-msm/board-mahimahi.c       |   13 +---
 arch/arm/mach-msm/board-msm7x30.c        |    3 +-
 arch/arm/mach-msm/board-sapphire.c       |   13 ++--
 arch/arm/mach-msm/board-trout.c          |    8 +--
 arch/arm/mach-orion5x/common.c           |    3 +-
 arch/arm/mach-orion5x/common.h           |    3 +-
 arch/arm/mach-pxa/cm-x300.c              |    3 +-
 arch/arm/mach-pxa/corgi.c                |   10 +--
 arch/arm/mach-pxa/eseries.c              |    9 +--
 arch/arm/mach-pxa/poodle.c               |    8 +--
 arch/arm/mach-pxa/spitz.c                |    8 +--
 arch/arm/mach-pxa/tosa.c                 |    8 +--
 arch/arm/mach-realview/core.c            |   11 +--
 arch/arm/mach-realview/core.h            |    3 +-
 arch/arm/mach-realview/realview_pb1176.c |    8 +--
 arch/arm/mach-realview/realview_pbx.c    |   17 ++---
 arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
 arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
 arch/arm/mach-sa1100/assabet.c           |    2 +-
 arch/arm/mm/init.c                       |   67 +++++++-----------
 arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
 33 files changed, 136 insertions(+), 291 deletions(-)

diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index 17a3fa2..c43473a 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -14,7 +14,6 @@
 #include <linux/reboot.h>
 
 struct tag;
-struct meminfo;
 struct pt_regs;
 struct smp_operations;
 #ifdef CONFIG_SMP
@@ -47,8 +46,7 @@ struct machine_desc {
 	enum reboot_mode	reboot_mode;	/* default restart mode	*/
 	struct smp_operations	*smp;		/* SMP operations	*/
 	bool			(*smp_init)(void);
-	void			(*fixup)(struct tag *, char **,
-					 struct meminfo *);
+	void			(*fixup)(struct tag *, char **);
 	void			(*init_meminfo)(void);
 	void			(*reserve)(void);/* reserve mem blocks	*/
 	void			(*map_io)(void);/* IO mapping function	*/
diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
index c2f5102..bf47a6c 100644
--- a/arch/arm/include/asm/memblock.h
+++ b/arch/arm/include/asm/memblock.h
@@ -1,10 +1,9 @@
 #ifndef _ASM_ARM_MEMBLOCK_H
 #define _ASM_ARM_MEMBLOCK_H
 
-struct meminfo;
 struct machine_desc;
 
-void arm_memblock_init(struct meminfo *, const struct machine_desc *);
+void arm_memblock_init(const struct machine_desc *);
 phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
 
 #endif
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index 8d6a089..0196091 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
  */
 #define NR_BANKS	CONFIG_ARM_NR_BANKS
 
-struct membank {
-	phys_addr_t start;
-	phys_addr_t size;
-	unsigned int highmem;
-};
-
-struct meminfo {
-	int nr_banks;
-	struct membank bank[NR_BANKS];
-};
-
-extern struct meminfo meminfo;
-
-#define for_each_bank(iter,mi)				\
-	for (iter = 0; iter < (mi)->nr_banks; iter++)
-
-#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
-#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
-#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
-#define bank_phys_start(bank)	(bank)->start
-#define bank_phys_end(bank)	((bank)->start + (bank)->size)
-#define bank_phys_size(bank)	(bank)->size
-
 extern int arm_add_memory(u64 start, u64 size);
 extern void early_print(const char *str, ...);
 extern void dump_machine_table(void);
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index 8c14de8..7807ef5 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/root_dev.h>
 #include <linux/screen_info.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/system_info.h>
@@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
 	}
 
 	if (mdesc->fixup)
-		mdesc->fixup(tags, &from, &meminfo);
+		mdesc->fixup(tags, &from);
 
 	if (tags->hdr.tag == ATAG_CORE) {
-		if (meminfo.nr_banks != 0)
+		if (memblock_phys_mem_size())
 			squash_mem_tags(tags);
 		save_atags(tags);
 		parse_tags(tags);
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index f751714..398cd5f 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -26,11 +26,6 @@
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 
-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	arm_add_memory(base, size);
-}
-
 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
 	return memblock_virt_alloc(size, align);
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1e8b030..7dd83d0 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -625,15 +625,8 @@ void __init dump_machine_table(void)
 
 int __init arm_add_memory(u64 start, u64 size)
 {
-	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
 	u64 aligned_start;
 
-	if (meminfo.nr_banks >= NR_BANKS) {
-		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
-			(long long)start);
-		return -EINVAL;
-	}
-
 	/*
 	 * Ensure that start/size are aligned to a page boundary.
 	 * Size is appropriately rounded down, start is rounded up.
@@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
 		aligned_start = PHYS_OFFSET;
 	}
 
-	bank->start = aligned_start;
-	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
+	start = aligned_start;
+	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
 
 	/*
 	 * Check whether this memory region has non-zero size or
 	 * invalid node number.
 	 */
-	if (bank->size == 0)
+	if (size == 0)
 		return -EINVAL;
 
-	meminfo.nr_banks++;
+	memblock_add(start, size);
 	return 0;
 }
 
@@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
  * Pick out the memory size.  We look for mem=size at start,
  * where start and size are "size[KkMm]"
  */
+
 static int __init early_mem(char *p)
 {
 	static int usermem __initdata = 0;
@@ -706,7 +700,8 @@ static int __init early_mem(char *p)
 	 */
 	if (usermem == 0) {
 		usermem = 1;
-		meminfo.nr_banks = 0;
+		memblock_remove(memblock_start_of_DRAM(),
+			memblock_end_of_DRAM() - memblock_start_of_DRAM());
 	}
 
 	start = PHYS_OFFSET;
@@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
 static inline void reserve_crashkernel(void) {}
 #endif /* CONFIG_KEXEC */
 
-static int __init meminfo_cmp(const void *_a, const void *_b)
-{
-	const struct membank *a = _a, *b = _b;
-	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
-	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
-}
-
 void __init hyp_mode_check(void)
 {
 #ifdef CONFIG_ARM_VIRT_EXT
@@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
-	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
-
 	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
 	setup_dma_zone(mdesc);
 	sanity_check_meminfo();
-	arm_memblock_init(&meminfo, mdesc);
+	arm_memblock_init(mdesc);
 
 	paging_init(mdesc);
 	request_standard_resources(mdesc);
diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
index b476424..4d04b91 100644
--- a/arch/arm/mach-clps711x/board-clep7312.c
+++ b/arch/arm/mach-clps711x/board-clep7312.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/string.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -26,11 +27,9 @@
 #include "common.h"
 
 static void __init
-fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_clep7312(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = 0x01000000;
+	memblock_add(0xc0000000, 0x01000000);
 }
 
 MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
index fe6184e..b617aa2 100644
--- a/arch/arm/mach-clps711x/board-edb7211.c
+++ b/arch/arm/mach-clps711x/board-edb7211.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/partitions.h>
@@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
 }
 
 static void __init
-fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_edb7211(struct tag *tags, char **cmdline)
 {
 	/*
 	 * Bank start addresses are not present in the information
@@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
 	 * Banks sizes _are_ present in the param block, but we're
 	 * not using that information yet.
 	 */
-	mi->bank[0].start = 0xc0000000;
-	mi->bank[0].size = SZ_8M;
-	mi->bank[1].start = 0xc1000000;
-	mi->bank[1].size = SZ_8M;
-	mi->nr_banks = 2;
+	memblock_add(0xc0000000, SZ_8M);
+	memblock_add(0xc1000000, SZ_8M);
 }
 
 static void __init edb7211_init(void)
diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
index dd81b06..c1c6729 100644
--- a/arch/arm/mach-clps711x/board-p720t.c
+++ b/arch/arm/mach-clps711x/board-p720t.c
@@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
 };
 
 static void __init
-fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
+fixup_p720t(struct tag *tag, char **cmdline)
 {
 	/*
 	 * Our bootloader doesn't setup any tags (yet).
diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
index 9669cc0..de86ab6 100644
--- a/arch/arm/mach-footbridge/cats-hw.c
+++ b/arch/arm/mach-footbridge/cats-hw.c
@@ -76,7 +76,7 @@ __initcall(cats_hw_init);
  * hard reboots fail on early boards.
  */
 static void __init
-fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_cats(struct tag *tags, char **cmdline)
 {
 	screen_info.orig_video_lines  = 25;
 	screen_info.orig_video_points = 16;
diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
index eb1fa5c..cdee08c 100644
--- a/arch/arm/mach-footbridge/netwinder-hw.c
+++ b/arch/arm/mach-footbridge/netwinder-hw.c
@@ -620,7 +620,7 @@ __initcall(nw_hw_init);
  * the parameter page.
  */
 static void __init
-fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_netwinder(struct tag *tags, char **cmdline)
 {
 #ifdef CONFIG_ISAPNP
 	extern int isapnp_disable;
diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
index a775298..61bfe58 100644
--- a/arch/arm/mach-msm/board-halibut.c
+++ b/arch/arm/mach-msm/board-halibut.c
@@ -83,11 +83,6 @@ static void __init halibut_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init halibut_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
-{
-}
-
 static void __init halibut_map_io(void)
 {
 	msm_map_common_io();
@@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
 
 MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
 	.atag_offset	= 0x100,
-	.fixup		= halibut_fixup,
 	.map_io		= halibut_map_io,
 	.init_early	= halibut_init_early,
 	.init_irq	= halibut_init_irq,
diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
index 7d9981c..873c3ca 100644
--- a/arch/arm/mach-msm/board-mahimahi.c
+++ b/arch/arm/mach-msm/board-mahimahi.c
@@ -22,6 +22,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/memblock.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 2;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
-	mi->bank[0].size = (219*1024*1024);
-	mi->bank[1].start = MSM_HIGHMEM_BASE;
-	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
-	mi->bank[1].size = MSM_HIGHMEM_SIZE;
+	memblock_add(PHYS_OFFSET, 219*SZ_1M);
+	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
 }
 
 static void __init mahimahi_map_io(void)
diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 46de789..b621b23 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -40,8 +40,7 @@
 #include "proc_comm.h"
 #include "common.h"
 
-static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
-		struct meminfo *mi)
+static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
 {
 	for (; tag->hdr.size; tag = tag_next(tag))
 		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
index 3276051..e509679 100644
--- a/arch/arm/mach-msm/board-sapphire.c
+++ b/arch/arm/mach-msm/board-sapphire.c
@@ -35,6 +35,7 @@
 
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include "gpio_chip.h"
 #include "board-sapphire.h"
@@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
 	}
 };
 
-static void __init sapphire_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init sapphire_fixup(struct tag *tags, char **cmdline)
 {
 	int smi_sz = parse_tag_smi((const struct tag *)tags);
 
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	if (smi_sz == 32) {
-		mi->bank[0].size = (84*1024*1024);
+		memblock_add(PHYS_OFFSET, 84*SZ_1M);
 	} else if (smi_sz == 64) {
-		mi->bank[0].size = (101*1024*1024);
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 	} else {
+		memblock_add(PHYS_OFFSET, 101*SZ_1M);
 		/* Give a default value when not get smi size */
 		smi_sz = 64;
-		mi->bank[0].size = (101*1024*1024);
 	}
 }
 
diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
index 015d544..58826cf 100644
--- a/arch/arm/mach-msm/board-trout.c
+++ b/arch/arm/mach-msm/board-trout.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/clkdev.h>
+#include <linux/memblock.h>
 
 #include <asm/system_info.h>
 #include <asm/mach-types.h>
@@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
 	msm_init_irq();
 }
 
-static void __init trout_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init trout_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks = 1;
-	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].size = (101*1024*1024);
+	memblock_add(PHYS_OFFSET, 101*SZ_1M);
 }
 
 static void __init trout_init(void)
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 3f1de11..6bbb7b5 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
  * Many orion-based systems have buggy bootloader implementations.
  * This is a common fixup for bogus memory tags.
  */
-void __init tag_fixup_mem32(struct tag *t, char **from,
-			    struct meminfo *meminfo)
+void __init tag_fixup_mem32(struct tag *t, char **from)
 {
 	for (; t->hdr.size; t = tag_next(t))
 		if (t->hdr.tag == ATAG_MEM &&
diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
index f565f99..175ec4c 100644
--- a/arch/arm/mach-orion5x/common.h
+++ b/arch/arm/mach-orion5x/common.h
@@ -71,9 +71,8 @@ void edmini_v2_init(void);
 static inline void edmini_v2_init(void) {};
 #endif
 
-struct meminfo;
 struct tag;
-extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
+extern void __init tag_fixup_mem32(struct tag *, char **);
 
 /*****************************************************************************
  * Helpers to access Orion registers
diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
index 584439bf..4d3588d 100644
--- a/arch/arm/mach-pxa/cm-x300.c
+++ b/arch/arm/mach-pxa/cm-x300.c
@@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
 	cm_x300_init_bl();
 }
 
-static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
-				 struct meminfo *mi)
+static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
 {
 	/* Make sure that mi->bank[0].start = PHYS_ADDR */
 	for (; tags->hdr.size; tags = tag_next(tags))
diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
index f162f1b..a763744 100644
--- a/arch/arm/mach-pxa/corgi.c
+++ b/arch/arm/mach-pxa/corgi.c
@@ -33,6 +33,7 @@
 #include <linux/mtd/sharpsl.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/module.h>
+#include <linux/memblock.h>
 #include <video/w100fb.h>
 
 #include <asm/setup.h>
@@ -713,16 +714,13 @@ static void __init corgi_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_corgi(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init fixup_corgi(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_corgi())
-		mi->bank[0].size = (32*1024*1024);
+		memblock_add(0xa0000000, SZ_32M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_CORGI
diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
index 8280ebca..cfb8641 100644
--- a/arch/arm/mach-pxa/eseries.c
+++ b/arch/arm/mach-pxa/eseries.c
@@ -21,6 +21,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/memblock.h>
 
 #include <video/w100fb.h>
 
@@ -41,14 +42,12 @@
 #include "clock.h"
 
 /* Only e800 has 128MB RAM */
-void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
+void __init eseries_fixup(struct tag *tags, char **cmdline)
 {
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
 	if (machine_is_e800())
-		mi->bank[0].size = (128*1024*1024);
+		memblock_add(0xa0000000, SZ_128M);
 	else
-		mi->bank[0].size = (64*1024*1024);
+		memblock_add(0xa0000000, SZ_64M);
 }
 
 struct gpio_vbus_mach_info e7xx_udc_info = {
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index aedf053..1319916 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -29,6 +29,7 @@
 #include <linux/spi/ads7846.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -456,13 +457,10 @@ static void __init poodle_init(void)
 	poodle_init_spi();
 }
 
-static void __init fixup_poodle(struct tag *tags, char **cmdline,
-				struct meminfo *mi)
+static void __init fixup_poodle(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (32*1024*1024);
+	memblock_add(0xa0000000, SZ_32M);
 }
 
 MACHINE_START(POODLE, "SHARP Poodle")
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 0b11c1a..840c3a4 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -971,13 +972,10 @@ static void __init spitz_init(void)
 	spitz_i2c_init();
 }
 
-static void __init spitz_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init spitz_fixup(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks = 1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 #ifdef CONFIG_MACH_SPITZ
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index ef5557b..c158a6e 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -37,6 +37,7 @@
 #include <linux/i2c/pxa-i2c.h>
 #include <linux/usb/gpio_vbus.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -960,13 +961,10 @@ static void __init tosa_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
-static void __init fixup_tosa(struct tag *tags, char **cmdline,
-			      struct meminfo *mi)
+static void __init fixup_tosa(struct tag *tags, char **cmdline)
 {
 	sharpsl_save_param();
-	mi->nr_banks=1;
-	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].size = (64*1024*1024);
+	memblock_add(0xa0000000, SZ_64M);
 }
 
 MACHINE_START(TOSA, "SHARP Tosa")
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 1d5ee5c..c2fae3a 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -31,6 +31,7 @@
 #include <linux/amba/mmci.h>
 #include <linux/gfp.h>
 #include <linux/mtd/physmap.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
 /*
  * Setup the memory banks.
  */
-void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
+void realview_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
 	 * Half of this is mirrored at 0.
 	 */
 #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
-	meminfo->bank[0].start = 0x70000000;
-	meminfo->bank[0].size = SZ_512M;
-	meminfo->nr_banks = 1;
+	memblock_add(0x70000000, SZ_512M);
 #else
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_256M);
 #endif
 }
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 602ca5e..844946d 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
 extern int realview_eth_register(const char *name, struct resource *res);
 extern int realview_usb_register(struct resource *res);
 extern void realview_init_early(void);
-extern void realview_fixup(struct tag *tags, char **from,
-			   struct meminfo *meminfo);
+extern void realview_fixup(struct tag *tags, char **from);
 
 extern struct smp_operations realview_smp_ops;
 extern void realview_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index c5eade7..6abf6a0 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -32,6 +32,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
 	dsb();
 }
 
-static void realview_pb1176_fixup(struct tag *tags, char **from,
-				  struct meminfo *meminfo)
+static void realview_pb1176_fixup(struct tag *tags, char **from)
 {
 	/*
 	 * RealView PB1176 only has 128MB of RAM mapped at 0.
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_128M;
-	meminfo->nr_banks = 1;
+	memblock_add(0, SZ_128M);
 }
 
 static void __init realview_pb1176_init(void)
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 9d75493..60d322a 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -29,6 +29,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/platform_data/clk-realview.h>
 #include <linux/reboot.h>
+#include <linux/memblock.h>
 
 #include <asm/irq.h>
 #include <asm/mach-types.h>
@@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
 	realview_pbx_twd_init();
 }
 
-static void realview_pbx_fixup(struct tag *tags, char **from,
-			       struct meminfo *meminfo)
+static void realview_pbx_fixup(struct tag *tags, char **from)
 {
 #ifdef CONFIG_SPARSEMEM
 	/*
 	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
 	 * asm/mach/memory.h for more information).
 	 */
-	meminfo->bank[0].start = 0;
-	meminfo->bank[0].size = SZ_256M;
-	meminfo->bank[1].start = 0x20000000;
-	meminfo->bank[1].size = SZ_512M;
-	meminfo->bank[2].start = 0x80000000;
-	meminfo->bank[2].size = SZ_256M;
-	meminfo->nr_banks = 3;
+
+	memblock_add(0, SZ_256M);
+	memblock_add(0x20000000, SZ_512M);
+	memblock_add(0x80000000, SZ_256M);
 #else
-	realview_fixup(tags, from, meminfo);
+	realview_fixup(tags, from);
 #endif
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
index f5bc721..0551758 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
@@ -21,6 +21,7 @@
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
-				  struct meminfo *mi)
+static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
index f7ec9c5..aa550f5 100644
--- a/arch/arm/mach-s3c24xx/mach-vstms.c
+++ b/arch/arm/mach-s3c24xx/mach-vstms.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/nand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
+#include <linux/memblock.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
 	&s3c2412_device_dma,
 };
 
-static void __init vstms_fixup(struct tag *tags, char **cmdline,
-			       struct meminfo *mi)
+static void __init vstms_fixup(struct tag *tags, char **cmdline)
 {
 	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
-		mi->nr_banks=1;
-		mi->bank[0].start = 0x30000000;
-		mi->bank[0].size = SZ_64M;
+		memblock_add(0x30000000, SZ_64M);
 	}
 }
 
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
index 8443a27..7dd894e 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
 }
 
 static void __init
-fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
+fixup_assabet(struct tag *tags, char **cmdline)
 {
 	/* This must be done before any call to machine_has_neponset() */
 	map_sa1100_gpio_regs();
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 42fc139..a62dadd 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
  * initialization functions, as well as show_mem() for the skipping
  * of holes in the memory map.  It is populated by arm_add_memory().
  */
-struct meminfo meminfo;
-
 void show_mem(unsigned int filter)
 {
 	int free = 0, total = 0, reserved = 0;
-	int shared = 0, cached = 0, slab = 0, i;
-	struct meminfo * mi = &meminfo;
+	int shared = 0, cached = 0, slab = 0;
+	struct memblock_region *reg;
 
 	printk("Mem-info:\n");
 	show_free_areas(filter);
 
-	for_each_bank (i, mi) {
-		struct membank *bank = &mi->bank[i];
+	for_each_memblock (memory, reg) {
 		unsigned int pfn1, pfn2;
 		struct page *page, *end;
 
-		pfn1 = bank_pfn_start(bank);
-		pfn2 = bank_pfn_end(bank);
+		pfn1 = memblock_region_memory_base_pfn(reg);
+		pfn2 = memblock_region_memory_end_pfn(reg);
 
 		page = pfn_to_page(pfn1);
 		end  = pfn_to_page(pfn2 - 1) + 1;
@@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
 static void __init find_limits(unsigned long *min, unsigned long *max_low,
 			       unsigned long *max_high)
 {
-	struct meminfo *mi = &meminfo;
-	int i;
-
-	/* This assumes the meminfo array is properly sorted */
-	*min = bank_pfn_start(&mi->bank[0]);
-	for_each_bank (i, mi)
-		if (mi->bank[i].highmem)
-				break;
-	*max_low = bank_pfn_end(&mi->bank[i - 1]);
-	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
+	*max_low = PFN_DOWN(memblock_get_current_limit());
+	*min = PFN_UP(memblock_start_of_DRAM());
+	*max_high = PFN_DOWN(memblock_end_of_DRAM());
 }
 
 #ifdef CONFIG_ZONE_DMA
@@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
 	return phys;
 }
 
-void __init arm_memblock_init(struct meminfo *mi,
-	const struct machine_desc *mdesc)
+void __init arm_memblock_init(const struct machine_desc *mdesc)
 {
-	int i;
-
-	for (i = 0; i < mi->nr_banks; i++)
-		memblock_add(mi->bank[i].start, mi->bank[i].size);
-
 	/* Register the kernel text, kernel data and initrd with memblock. */
 #ifdef CONFIG_XIP_KERNEL
 	memblock_reserve(__pa(_sdata), _end - _sdata);
@@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 /*
  * The mem_map array can get very big.  Free the unused area of the memory map.
  */
-static void __init free_unused_memmap(struct meminfo *mi)
+static void __init free_unused_memmap(void)
 {
-	unsigned long bank_start, prev_bank_end = 0;
-	unsigned int i;
+	unsigned long start, prev_end = 0;
+	struct memblock_region *reg;
 
 	/*
 	 * This relies on each bank being in address order.
 	 * The banks are sorted previously in bootmem_init().
 	 */
-	for_each_bank(i, mi) {
-		struct membank *bank = &mi->bank[i];
-
-		bank_start = bank_pfn_start(bank);
+	for_each_memblock(memory, reg) {
+		start = __phys_to_pfn(reg->base);
 
 #ifdef CONFIG_SPARSEMEM
 		/*
 		 * Take care not to free memmap entries that don't exist
 		 * due to SPARSEMEM sections which aren't present.
 		 */
-		bank_start = min(bank_start,
-				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
+		start = min(start,
+				 ALIGN(prev_end, PAGES_PER_SECTION));
 #else
 		/*
 		 * Align down here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank start aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
+		start = round_down(start, MAX_ORDER_NR_PAGES);
 #endif
 		/*
 		 * If we had a previous bank, and there is a space
 		 * between the current bank and the previous, free it.
 		 */
-		if (prev_bank_end && prev_bank_end < bank_start)
-			free_memmap(prev_bank_end, bank_start);
+		if (prev_end && prev_end < start)
+			free_memmap(prev_end, start);
 
 		/*
 		 * Align up here since the VM subsystem insists that the
 		 * memmap entries are valid from the bank end aligned to
 		 * MAX_ORDER_NR_PAGES.
 		 */
-		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
+		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
+				 MAX_ORDER_NR_PAGES);
 	}
 
 #ifdef CONFIG_SPARSEMEM
-	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
-		free_memmap(prev_bank_end,
-			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
+	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
+		free_memmap(prev_end,
+			    ALIGN(prev_end, PAGES_PER_SECTION));
 #endif
 }
 
@@ -536,7 +519,7 @@ void __init mem_init(void)
 	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
 
 	/* this will put all unused low memory onto the freelists */
-	free_unused_memmap(&meminfo);
+	free_unused_memmap();
 	free_all_bootmem();
 
 #ifdef CONFIG_SA1111
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 4f08c13..23433ef 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
 void __init sanity_check_meminfo(void)
 {
 	phys_addr_t memblock_limit = 0;
-	int i, j, highmem = 0;
+	int highmem = 0;
 	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
+	struct memblock_region *reg;
 
-	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
-		struct membank *bank = &meminfo.bank[j];
-		phys_addr_t size_limit;
-
-		*bank = meminfo.bank[i];
-		size_limit = bank->size;
+	for_each_memblock(memory, reg) {
+		phys_addr_t block_start = reg->base;
+		phys_addr_t block_end = reg->base + reg->size;
+		phys_addr_t size_limit = reg->size;
 
-		if (bank->start >= vmalloc_limit)
+		if (reg->base >= vmalloc_limit)
 			highmem = 1;
 		else
-			size_limit = vmalloc_limit - bank->start;
+			size_limit = vmalloc_limit - reg->base;
 
-		bank->highmem = highmem;
 
-#ifdef CONFIG_HIGHMEM
-		/*
-		 * Split those memory banks which are partially overlapping
-		 * the vmalloc area greatly simplifying things later.
-		 */
-		if (!highmem && bank->size > size_limit) {
-			if (meminfo.nr_banks >= NR_BANKS) {
-				printk(KERN_CRIT "NR_BANKS too low, "
-						 "ignoring high memory\n");
-			} else {
-				memmove(bank + 1, bank,
-					(meminfo.nr_banks - i) * sizeof(*bank));
-				meminfo.nr_banks++;
-				i++;
-				bank[1].size -= size_limit;
-				bank[1].start = vmalloc_limit;
-				bank[1].highmem = highmem = 1;
-				j++;
+		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
+
+			if (highmem) {
+				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
+					&block_start, &block_end);
+				memblock_remove(block_start, block_end);
+				continue;
 			}
-			bank->size = size_limit;
-		}
-#else
-		/*
-		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
-		 */
-		if (highmem) {
-			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
-			       "(!CONFIG_HIGHMEM).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1);
-			continue;
-		}
 
-		/*
-		 * Check whether this memory bank would partially overlap
-		 * the vmalloc area.
-		 */
-		if (bank->size > size_limit) {
-			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
-			       "to -%.8llx (vmalloc region overlap).\n",
-			       (unsigned long long)bank->start,
-			       (unsigned long long)bank->start + bank->size - 1,
-			       (unsigned long long)bank->start + size_limit - 1);
-			bank->size = size_limit;
+			if (reg->size > size_limit) {
+				phys_addr_t overlap_size = reg->size - size_limit;
+
+				pr_notice("Truncating RAM at %pa-%pa to -%pa",
+					&block_start, &block_end, &overlap_size);
+				memblock_remove(vmalloc_limit, overlap_size);
+				block_end = vmalloc_limit;
+			}
 		}
-#endif
-		if (!bank->highmem) {
-			phys_addr_t bank_end = bank->start + bank->size;
 
-			if (bank_end > arm_lowmem_limit)
-				arm_lowmem_limit = bank_end;
+		if (!highmem) {
+			if (block_end > arm_lowmem_limit)
+				arm_lowmem_limit = reg->base + size_limit;
+
 
 			/*
 			 * Find the first non-section-aligned page, and point
@@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
 			 * occurs before any free memory is mapped.
 			 */
 			if (!memblock_limit) {
-				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
-					memblock_limit = bank->start;
-				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
-					memblock_limit = bank_end;
+				if (!IS_ALIGNED(block_start, SECTION_SIZE))
+					memblock_limit = block_start;
+				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
+					memblock_limit = block_end;
 			}
-		}
-		j++;
-	}
-#ifdef CONFIG_HIGHMEM
-	if (highmem) {
-		const char *reason = NULL;
 
-		if (cache_is_vipt_aliasing()) {
-			/*
-			 * Interactions between kmap and other mappings
-			 * make highmem support with aliasing VIPT caches
-			 * rather difficult.
-			 */
-			reason = "with VIPT aliasing cache";
-		}
-		if (reason) {
-			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
-				reason);
-			while (j > 0 && meminfo.bank[j - 1].highmem)
-				j--;
 		}
+
 	}
-#endif
-	meminfo.nr_banks = j;
+
 	high_memory = __va(arm_lowmem_limit - 1) + 1;
 
 	/*
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

^ permalink raw reply related	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 1/2] mm/memblock: add memblock_get_current_limit
  2014-02-11 21:14   ` Laura Abbott
@ 2014-02-11 21:21     ` Andrew Morton
  -1 siblings, 0 replies; 26+ messages in thread
From: Andrew Morton @ 2014-02-11 21:21 UTC (permalink / raw)
  To: Laura Abbott
  Cc: linux-mm, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar

On Tue, 11 Feb 2014 13:14:24 -0800 Laura Abbott <lauraa@codeaurora.org> wrote:

> Appart from setting the limit of memblock, it's also useful to be able
> to get the limit to avoid recalculating it every time. Add the function
> to do so.
> 
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Please add my acked-by to this.  You might also add a note that I do not ack
your spelling of "apart" ;)


^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 1/2] mm/memblock: add memblock_get_current_limit
@ 2014-02-11 21:21     ` Andrew Morton
  0 siblings, 0 replies; 26+ messages in thread
From: Andrew Morton @ 2014-02-11 21:21 UTC (permalink / raw)
  To: Laura Abbott
  Cc: linux-mm, linux-kernel, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar

On Tue, 11 Feb 2014 13:14:24 -0800 Laura Abbott <lauraa@codeaurora.org> wrote:

> Appart from setting the limit of memblock, it's also useful to be able
> to get the limit to avoid recalculating it every time. Add the function
> to do so.
> 
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Please add my acked-by to this.  You might also add a note that I do not ack
your spelling of "apart" ;)

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
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^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-11 21:14   ` Laura Abbott
  (?)
@ 2014-02-12  5:09     ` Kukjin Kim
  -1 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-12  5:09 UTC (permalink / raw)
  To: Laura Abbott
  Cc: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, linux-arm-kernel, Nicolas Pitre, Courtney Cavin,
	Grygorii Strashko, Ard Biesheuvel, linux-arm-msm, Will Deacon,
	linux-kernel, Leif Lindholm, Grant Likely, linux-mm,
	Catalin Marinas

2014-02-12 2:44 GMT+05:30 Laura Abbott <lauraa@codeaurora.org>:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>  arch/arm/include/asm/mach/arch.h         |    4 +-
>  arch/arm/include/asm/memblock.h          |    3 +-
>  arch/arm/include/asm/setup.h             |   23 ------
>  arch/arm/kernel/atags_parse.c            |    5 +-
>  arch/arm/kernel/devtree.c                |    5 --
>  arch/arm/kernel/setup.c                  |   30 ++------
>  arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>  arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>  arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>  arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>  arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>  arch/arm/mach-msm/board-halibut.c        |    6 --
>  arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>  arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>  arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>  arch/arm/mach-msm/board-trout.c          |    8 +--
>  arch/arm/mach-orion5x/common.c           |    3 +-
>  arch/arm/mach-orion5x/common.h           |    3 +-
>  arch/arm/mach-pxa/cm-x300.c              |    3 +-
>  arch/arm/mach-pxa/corgi.c                |   10 +--
>  arch/arm/mach-pxa/eseries.c              |    9 +--
>  arch/arm/mach-pxa/poodle.c               |    8 +--
>  arch/arm/mach-pxa/spitz.c                |    8 +--
>  arch/arm/mach-pxa/tosa.c                 |    8 +--
>  arch/arm/mach-realview/core.c            |   11 +--
>  arch/arm/mach-realview/core.h            |    3 +-
>  arch/arm/mach-realview/realview_pb1176.c |    8 +--
>  arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>  arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>  arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>  arch/arm/mach-sa1100/assabet.c           |    2 +-
>  arch/arm/mm/init.c                       |   67 +++++++-----------
>  arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>  33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
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^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12  5:09     ` Kukjin Kim
  0 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-12  5:09 UTC (permalink / raw)
  To: Laura Abbott
  Cc: Russell King, David Brown, Daniel Walker, Jason Cooper,
	Andrew Lunn, Sebastian Hesselbarth, Eric Miao, Haojian Zhuang,
	Ben Dooks, linux-arm-kernel, Nicolas Pitre, Courtney Cavin,
	Grygorii Strashko, Ard Biesheuvel, linux-arm-msm, Will Deacon,
	linux-kernel, Leif Lindholm, Grant Likely, linux-mm,
	Catalin Marinas, Santosh Shilimkar, Andrew Morton,
	Marek Szyprowski

2014-02-12 2:44 GMT+05:30 Laura Abbott <lauraa@codeaurora.org>:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>  arch/arm/include/asm/mach/arch.h         |    4 +-
>  arch/arm/include/asm/memblock.h          |    3 +-
>  arch/arm/include/asm/setup.h             |   23 ------
>  arch/arm/kernel/atags_parse.c            |    5 +-
>  arch/arm/kernel/devtree.c                |    5 --
>  arch/arm/kernel/setup.c                  |   30 ++------
>  arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>  arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>  arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>  arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>  arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>  arch/arm/mach-msm/board-halibut.c        |    6 --
>  arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>  arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>  arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>  arch/arm/mach-msm/board-trout.c          |    8 +--
>  arch/arm/mach-orion5x/common.c           |    3 +-
>  arch/arm/mach-orion5x/common.h           |    3 +-
>  arch/arm/mach-pxa/cm-x300.c              |    3 +-
>  arch/arm/mach-pxa/corgi.c                |   10 +--
>  arch/arm/mach-pxa/eseries.c              |    9 +--
>  arch/arm/mach-pxa/poodle.c               |    8 +--
>  arch/arm/mach-pxa/spitz.c                |    8 +--
>  arch/arm/mach-pxa/tosa.c                 |    8 +--
>  arch/arm/mach-realview/core.c            |   11 +--
>  arch/arm/mach-realview/core.h            |    3 +-
>  arch/arm/mach-realview/realview_pb1176.c |    8 +--
>  arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>  arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>  arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>  arch/arm/mach-sa1100/assabet.c           |    2 +-
>  arch/arm/mm/init.c                       |   67 +++++++-----------
>  arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>  33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12  5:09     ` Kukjin Kim
  0 siblings, 0 replies; 26+ messages in thread
From: Kukjin Kim @ 2014-02-12  5:09 UTC (permalink / raw)
  To: linux-arm-kernel

2014-02-12 2:44 GMT+05:30 Laura Abbott <lauraa@codeaurora.org>:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>  arch/arm/include/asm/mach/arch.h         |    4 +-
>  arch/arm/include/asm/memblock.h          |    3 +-
>  arch/arm/include/asm/setup.h             |   23 ------
>  arch/arm/kernel/atags_parse.c            |    5 +-
>  arch/arm/kernel/devtree.c                |    5 --
>  arch/arm/kernel/setup.c                  |   30 ++------
>  arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>  arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>  arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>  arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>  arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>  arch/arm/mach-msm/board-halibut.c        |    6 --
>  arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>  arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>  arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>  arch/arm/mach-msm/board-trout.c          |    8 +--
>  arch/arm/mach-orion5x/common.c           |    3 +-
>  arch/arm/mach-orion5x/common.h           |    3 +-
>  arch/arm/mach-pxa/cm-x300.c              |    3 +-
>  arch/arm/mach-pxa/corgi.c                |   10 +--
>  arch/arm/mach-pxa/eseries.c              |    9 +--
>  arch/arm/mach-pxa/poodle.c               |    8 +--
>  arch/arm/mach-pxa/spitz.c                |    8 +--
>  arch/arm/mach-pxa/tosa.c                 |    8 +--
>  arch/arm/mach-realview/core.c            |   11 +--
>  arch/arm/mach-realview/core.h            |    3 +-
>  arch/arm/mach-realview/realview_pb1176.c |    8 +--
>  arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>  arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>  arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--

For s3c24xx,
Acked-by: Kukjin Kim <kgene.kim@samsung.com>

>  arch/arm/mach-sa1100/assabet.c           |    2 +-
>  arch/arm/mm/init.c                       |   67 +++++++-----------
>  arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>  33 files changed, 136 insertions(+), 291 deletions(-)

Thanks,
Kukjin

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-11 21:14   ` Laura Abbott
  (?)
@ 2014-02-12  8:27     ` Marek Szyprowski
  -1 siblings, 0 replies; 26+ messages in thread
From: Marek Szyprowski @ 2014-02-12  8:27 UTC (permalink / raw)
  To: Laura Abbott, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar, linux-mm, Andrew Morton,
	Courtney Cavin, Grant Likely

Hello,

On 2014-02-11 22:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)
>
> diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
> index 17a3fa2..c43473a 100644
> --- a/arch/arm/include/asm/mach/arch.h
> +++ b/arch/arm/include/asm/mach/arch.h
> @@ -14,7 +14,6 @@
>   #include <linux/reboot.h>
>   
>   struct tag;
> -struct meminfo;
>   struct pt_regs;
>   struct smp_operations;
>   #ifdef CONFIG_SMP
> @@ -47,8 +46,7 @@ struct machine_desc {
>   	enum reboot_mode	reboot_mode;	/* default restart mode	*/
>   	struct smp_operations	*smp;		/* SMP operations	*/
>   	bool			(*smp_init)(void);
> -	void			(*fixup)(struct tag *, char **,
> -					 struct meminfo *);
> +	void			(*fixup)(struct tag *, char **);
>   	void			(*init_meminfo)(void);
>   	void			(*reserve)(void);/* reserve mem blocks	*/
>   	void			(*map_io)(void);/* IO mapping function	*/
> diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
> index c2f5102..bf47a6c 100644
> --- a/arch/arm/include/asm/memblock.h
> +++ b/arch/arm/include/asm/memblock.h
> @@ -1,10 +1,9 @@
>   #ifndef _ASM_ARM_MEMBLOCK_H
>   #define _ASM_ARM_MEMBLOCK_H
>   
> -struct meminfo;
>   struct machine_desc;
>   
> -void arm_memblock_init(struct meminfo *, const struct machine_desc *);
> +void arm_memblock_init(const struct machine_desc *);
>   phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
>   
>   #endif
> diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
> index 8d6a089..0196091 100644
> --- a/arch/arm/include/asm/setup.h
> +++ b/arch/arm/include/asm/setup.h
> @@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
>    */
>   #define NR_BANKS	CONFIG_ARM_NR_BANKS
>   
> -struct membank {
> -	phys_addr_t start;
> -	phys_addr_t size;
> -	unsigned int highmem;
> -};
> -
> -struct meminfo {
> -	int nr_banks;
> -	struct membank bank[NR_BANKS];
> -};
> -
> -extern struct meminfo meminfo;
> -
> -#define for_each_bank(iter,mi)				\
> -	for (iter = 0; iter < (mi)->nr_banks; iter++)
> -
> -#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
> -#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
> -#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
> -#define bank_phys_start(bank)	(bank)->start
> -#define bank_phys_end(bank)	((bank)->start + (bank)->size)
> -#define bank_phys_size(bank)	(bank)->size
> -
>   extern int arm_add_memory(u64 start, u64 size);
>   extern void early_print(const char *str, ...);
>   extern void dump_machine_table(void);
> diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
> index 8c14de8..7807ef5 100644
> --- a/arch/arm/kernel/atags_parse.c
> +++ b/arch/arm/kernel/atags_parse.c
> @@ -22,6 +22,7 @@
>   #include <linux/fs.h>
>   #include <linux/root_dev.h>
>   #include <linux/screen_info.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/system_info.h>
> @@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
>   	}
>   
>   	if (mdesc->fixup)
> -		mdesc->fixup(tags, &from, &meminfo);
> +		mdesc->fixup(tags, &from);
>   
>   	if (tags->hdr.tag == ATAG_CORE) {
> -		if (meminfo.nr_banks != 0)
> +		if (memblock_phys_mem_size())
>   			squash_mem_tags(tags);
>   		save_atags(tags);
>   		parse_tags(tags);
> diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
> index f751714..398cd5f 100644
> --- a/arch/arm/kernel/devtree.c
> +++ b/arch/arm/kernel/devtree.c
> @@ -26,11 +26,6 @@
>   #include <asm/mach/arch.h>
>   #include <asm/mach-types.h>
>   
> -void __init early_init_dt_add_memory_arch(u64 base, u64 size)
> -{
> -	arm_add_memory(base, size);
> -}
> -
>   void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
>   {
>   	return memblock_virt_alloc(size, align);
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 1e8b030..7dd83d0 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -625,15 +625,8 @@ void __init dump_machine_table(void)
>   
>   int __init arm_add_memory(u64 start, u64 size)
>   {
> -	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
>   	u64 aligned_start;
>   
> -	if (meminfo.nr_banks >= NR_BANKS) {
> -		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
> -			(long long)start);
> -		return -EINVAL;
> -	}
> -
>   	/*
>   	 * Ensure that start/size are aligned to a page boundary.
>   	 * Size is appropriately rounded down, start is rounded up.
> @@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
>   		aligned_start = PHYS_OFFSET;
>   	}
>   
> -	bank->start = aligned_start;
> -	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
> +	start = aligned_start;
> +	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
>   
>   	/*
>   	 * Check whether this memory region has non-zero size or
>   	 * invalid node number.
>   	 */
> -	if (bank->size == 0)
> +	if (size == 0)
>   		return -EINVAL;
>   
> -	meminfo.nr_banks++;
> +	memblock_add(start, size);
>   	return 0;
>   }
>   
> @@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
>    * Pick out the memory size.  We look for mem=size@start,
>    * where start and size are "size[KkMm]"
>    */
> +
>   static int __init early_mem(char *p)
>   {
>   	static int usermem __initdata = 0;
> @@ -706,7 +700,8 @@ static int __init early_mem(char *p)
>   	 */
>   	if (usermem == 0) {
>   		usermem = 1;
> -		meminfo.nr_banks = 0;
> +		memblock_remove(memblock_start_of_DRAM(),
> +			memblock_end_of_DRAM() - memblock_start_of_DRAM());
>   	}
>   
>   	start = PHYS_OFFSET;
> @@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
>   static inline void reserve_crashkernel(void) {}
>   #endif /* CONFIG_KEXEC */
>   
> -static int __init meminfo_cmp(const void *_a, const void *_b)
> -{
> -	const struct membank *a = _a, *b = _b;
> -	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
> -	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
> -}
> -
>   void __init hyp_mode_check(void)
>   {
>   #ifdef CONFIG_ARM_VIRT_EXT
> @@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
>   
>   	parse_early_param();
>   
> -	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
> -
>   	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
>   	setup_dma_zone(mdesc);
>   	sanity_check_meminfo();
> -	arm_memblock_init(&meminfo, mdesc);
> +	arm_memblock_init(mdesc);
>   
>   	paging_init(mdesc);
>   	request_standard_resources(mdesc);
> diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
> index b476424..4d04b91 100644
> --- a/arch/arm/mach-clps711x/board-clep7312.c
> +++ b/arch/arm/mach-clps711x/board-clep7312.c
> @@ -18,6 +18,7 @@
>   #include <linux/init.h>
>   #include <linux/types.h>
>   #include <linux/string.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -26,11 +27,9 @@
>   #include "common.h"
>   
>   static void __init
> -fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_clep7312(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = 0x01000000;
> +	memblock_add(0xc0000000, 0x01000000);
>   }
>   
>   MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
> diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
> index fe6184e..b617aa2 100644
> --- a/arch/arm/mach-clps711x/board-edb7211.c
> +++ b/arch/arm/mach-clps711x/board-edb7211.c
> @@ -16,6 +16,7 @@
>   #include <linux/interrupt.h>
>   #include <linux/backlight.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <linux/mtd/physmap.h>
>   #include <linux/mtd/partitions.h>
> @@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
>   }
>   
>   static void __init
> -fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_edb7211(struct tag *tags, char **cmdline)
>   {
>   	/*
>   	 * Bank start addresses are not present in the information
> @@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
>   	 * Banks sizes _are_ present in the param block, but we're
>   	 * not using that information yet.
>   	 */
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = SZ_8M;
> -	mi->bank[1].start = 0xc1000000;
> -	mi->bank[1].size = SZ_8M;
> -	mi->nr_banks = 2;
> +	memblock_add(0xc0000000, SZ_8M);
> +	memblock_add(0xc1000000, SZ_8M);
>   }
>   
>   static void __init edb7211_init(void)
> diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
> index dd81b06..c1c6729 100644
> --- a/arch/arm/mach-clps711x/board-p720t.c
> +++ b/arch/arm/mach-clps711x/board-p720t.c
> @@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
>   };
>   
>   static void __init
> -fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
> +fixup_p720t(struct tag *tag, char **cmdline)
>   {
>   	/*
>   	 * Our bootloader doesn't setup any tags (yet).
> diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
> index 9669cc0..de86ab6 100644
> --- a/arch/arm/mach-footbridge/cats-hw.c
> +++ b/arch/arm/mach-footbridge/cats-hw.c
> @@ -76,7 +76,7 @@ __initcall(cats_hw_init);
>    * hard reboots fail on early boards.
>    */
>   static void __init
> -fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_cats(struct tag *tags, char **cmdline)
>   {
>   	screen_info.orig_video_lines  = 25;
>   	screen_info.orig_video_points = 16;
> diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
> index eb1fa5c..cdee08c 100644
> --- a/arch/arm/mach-footbridge/netwinder-hw.c
> +++ b/arch/arm/mach-footbridge/netwinder-hw.c
> @@ -620,7 +620,7 @@ __initcall(nw_hw_init);
>    * the parameter page.
>    */
>   static void __init
> -fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_netwinder(struct tag *tags, char **cmdline)
>   {
>   #ifdef CONFIG_ISAPNP
>   	extern int isapnp_disable;
> diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
> index a775298..61bfe58 100644
> --- a/arch/arm/mach-msm/board-halibut.c
> +++ b/arch/arm/mach-msm/board-halibut.c
> @@ -83,11 +83,6 @@ static void __init halibut_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init halibut_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> -{
> -}
> -
>   static void __init halibut_map_io(void)
>   {
>   	msm_map_common_io();
> @@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
>   
>   MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
>   	.atag_offset	= 0x100,
> -	.fixup		= halibut_fixup,
>   	.map_io		= halibut_map_io,
>   	.init_early	= halibut_init_early,
>   	.init_irq	= halibut_init_irq,
> diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
> index 7d9981c..873c3ca 100644
> --- a/arch/arm/mach-msm/board-mahimahi.c
> +++ b/arch/arm/mach-msm/board-mahimahi.c
> @@ -22,6 +22,7 @@
>   #include <linux/io.h>
>   #include <linux/kernel.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach-types.h>
>   #include <asm/mach/arch.h>
> @@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 2;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
> -	mi->bank[0].size = (219*1024*1024);
> -	mi->bank[1].start = MSM_HIGHMEM_BASE;
> -	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
> -	mi->bank[1].size = MSM_HIGHMEM_SIZE;
> +	memblock_add(PHYS_OFFSET, 219*SZ_1M);
> +	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
>   }
>   
>   static void __init mahimahi_map_io(void)
> diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
> index 46de789..b621b23 100644
> --- a/arch/arm/mach-msm/board-msm7x30.c
> +++ b/arch/arm/mach-msm/board-msm7x30.c
> @@ -40,8 +40,7 @@
>   #include "proc_comm.h"
>   #include "common.h"
>   
> -static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
> -		struct meminfo *mi)
> +static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
>   {
>   	for (; tag->hdr.size; tag = tag_next(tag))
>   		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
> diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
> index 3276051..e509679 100644
> --- a/arch/arm/mach-msm/board-sapphire.c
> +++ b/arch/arm/mach-msm/board-sapphire.c
> @@ -35,6 +35,7 @@
>   
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include "gpio_chip.h"
>   #include "board-sapphire.h"
> @@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
>   	}
>   };
>   
> -static void __init sapphire_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init sapphire_fixup(struct tag *tags, char **cmdline)
>   {
>   	int smi_sz = parse_tag_smi((const struct tag *)tags);
>   
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
>   	if (smi_sz == 32) {
> -		mi->bank[0].size = (84*1024*1024);
> +		memblock_add(PHYS_OFFSET, 84*SZ_1M);
>   	} else if (smi_sz == 64) {
> -		mi->bank[0].size = (101*1024*1024);
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   	} else {
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   		/* Give a default value when not get smi size */
>   		smi_sz = 64;
> -		mi->bank[0].size = (101*1024*1024);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
> index 015d544..58826cf 100644
> --- a/arch/arm/mach-msm/board-trout.c
> +++ b/arch/arm/mach-msm/board-trout.c
> @@ -19,6 +19,7 @@
>   #include <linux/init.h>
>   #include <linux/platform_device.h>
>   #include <linux/clkdev.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/system_info.h>
>   #include <asm/mach-types.h>
> @@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
>   	msm_init_irq();
>   }
>   
> -static void __init trout_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init trout_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].size = (101*1024*1024);
> +	memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   }
>   
>   static void __init trout_init(void)
> diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
> index 3f1de11..6bbb7b5 100644
> --- a/arch/arm/mach-orion5x/common.c
> +++ b/arch/arm/mach-orion5x/common.c
> @@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
>    * Many orion-based systems have buggy bootloader implementations.
>    * This is a common fixup for bogus memory tags.
>    */
> -void __init tag_fixup_mem32(struct tag *t, char **from,
> -			    struct meminfo *meminfo)
> +void __init tag_fixup_mem32(struct tag *t, char **from)
>   {
>   	for (; t->hdr.size; t = tag_next(t))
>   		if (t->hdr.tag == ATAG_MEM &&
> diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
> index f565f99..175ec4c 100644
> --- a/arch/arm/mach-orion5x/common.h
> +++ b/arch/arm/mach-orion5x/common.h
> @@ -71,9 +71,8 @@ void edmini_v2_init(void);
>   static inline void edmini_v2_init(void) {};
>   #endif
>   
> -struct meminfo;
>   struct tag;
> -extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
> +extern void __init tag_fixup_mem32(struct tag *, char **);
>   
>   /*****************************************************************************
>    * Helpers to access Orion registers
> diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
> index 584439bf..4d3588d 100644
> --- a/arch/arm/mach-pxa/cm-x300.c
> +++ b/arch/arm/mach-pxa/cm-x300.c
> @@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
>   	cm_x300_init_bl();
>   }
>   
> -static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> +static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
>   {
>   	/* Make sure that mi->bank[0].start = PHYS_ADDR */
>   	for (; tags->hdr.size; tags = tag_next(tags))
> diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
> index f162f1b..a763744 100644
> --- a/arch/arm/mach-pxa/corgi.c
> +++ b/arch/arm/mach-pxa/corgi.c
> @@ -33,6 +33,7 @@
>   #include <linux/mtd/sharpsl.h>
>   #include <linux/input/matrix_keypad.h>
>   #include <linux/module.h>
> +#include <linux/memblock.h>
>   #include <video/w100fb.h>
>   
>   #include <asm/setup.h>
> @@ -713,16 +714,13 @@ static void __init corgi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_corgi(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init fixup_corgi(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_corgi())
> -		mi->bank[0].size = (32*1024*1024);
> +		memblock_add(0xa0000000, SZ_32M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_CORGI
> diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
> index 8280ebca..cfb8641 100644
> --- a/arch/arm/mach-pxa/eseries.c
> +++ b/arch/arm/mach-pxa/eseries.c
> @@ -21,6 +21,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
>   #include <linux/usb/gpio_vbus.h>
> +#include <linux/memblock.h>
>   
>   #include <video/w100fb.h>
>   
> @@ -41,14 +42,12 @@
>   #include "clock.h"
>   
>   /* Only e800 has 128MB RAM */
> -void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
> +void __init eseries_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_e800())
> -		mi->bank[0].size = (128*1024*1024);
> +		memblock_add(0xa0000000, SZ_128M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   struct gpio_vbus_mach_info e7xx_udc_info = {
> diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
> index aedf053..1319916 100644
> --- a/arch/arm/mach-pxa/poodle.c
> +++ b/arch/arm/mach-pxa/poodle.c
> @@ -29,6 +29,7 @@
>   #include <linux/spi/ads7846.h>
>   #include <linux/spi/pxa2xx_spi.h>
>   #include <linux/mtd/sharpsl.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/mach-types.h>
> @@ -456,13 +457,10 @@ static void __init poodle_init(void)
>   	poodle_init_spi();
>   }
>   
> -static void __init fixup_poodle(struct tag *tags, char **cmdline,
> -				struct meminfo *mi)
> +static void __init fixup_poodle(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (32*1024*1024);
> +	memblock_add(0xa0000000, SZ_32M);
>   }
>   
>   MACHINE_START(POODLE, "SHARP Poodle")
> diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
> index 0b11c1a..840c3a4 100644
> --- a/arch/arm/mach-pxa/spitz.c
> +++ b/arch/arm/mach-pxa/spitz.c
> @@ -32,6 +32,7 @@
>   #include <linux/io.h>
>   #include <linux/module.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -971,13 +972,10 @@ static void __init spitz_init(void)
>   	spitz_i2c_init();
>   }
>   
> -static void __init spitz_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init spitz_fixup(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_SPITZ
> diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
> index ef5557b..c158a6e 100644
> --- a/arch/arm/mach-pxa/tosa.c
> +++ b/arch/arm/mach-pxa/tosa.c
> @@ -37,6 +37,7 @@
>   #include <linux/i2c/pxa-i2c.h>
>   #include <linux/usb/gpio_vbus.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -960,13 +961,10 @@ static void __init tosa_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_tosa(struct tag *tags, char **cmdline,
> -			      struct meminfo *mi)
> +static void __init fixup_tosa(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   MACHINE_START(TOSA, "SHARP Tosa")
> diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
> index 1d5ee5c..c2fae3a 100644
> --- a/arch/arm/mach-realview/core.c
> +++ b/arch/arm/mach-realview/core.c
> @@ -31,6 +31,7 @@
>   #include <linux/amba/mmci.h>
>   #include <linux/gfp.h>
>   #include <linux/mtd/physmap.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
>   /*
>    * Setup the memory banks.
>    */
> -void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
> +void realview_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
>   	 * Half of this is mirrored at 0.
>   	 */
>   #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
> -	meminfo->bank[0].start = 0x70000000;
> -	meminfo->bank[0].size = SZ_512M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0x70000000, SZ_512M);
>   #else
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_256M);
>   #endif
>   }
> diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
> index 602ca5e..844946d 100644
> --- a/arch/arm/mach-realview/core.h
> +++ b/arch/arm/mach-realview/core.h
> @@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
>   extern int realview_eth_register(const char *name, struct resource *res);
>   extern int realview_usb_register(struct resource *res);
>   extern void realview_init_early(void);
> -extern void realview_fixup(struct tag *tags, char **from,
> -			   struct meminfo *meminfo);
> +extern void realview_fixup(struct tag *tags, char **from);
>   
>   extern struct smp_operations realview_smp_ops;
>   extern void realview_cpu_die(unsigned int cpu);
> diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
> index c5eade7..6abf6a0 100644
> --- a/arch/arm/mach-realview/realview_pb1176.c
> +++ b/arch/arm/mach-realview/realview_pb1176.c
> @@ -32,6 +32,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
>   	dsb();
>   }
>   
> -static void realview_pb1176_fixup(struct tag *tags, char **from,
> -				  struct meminfo *meminfo)
> +static void realview_pb1176_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * RealView PB1176 only has 128MB of RAM mapped at 0.
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_128M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_128M);
>   }
>   
>   static void __init realview_pb1176_init(void)
> diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
> index 9d75493..60d322a 100644
> --- a/arch/arm/mach-realview/realview_pbx.c
> +++ b/arch/arm/mach-realview/realview_pbx.c
> @@ -29,6 +29,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/irq.h>
>   #include <asm/mach-types.h>
> @@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
>   	realview_pbx_twd_init();
>   }
>   
> -static void realview_pbx_fixup(struct tag *tags, char **from,
> -			       struct meminfo *meminfo)
> +static void realview_pbx_fixup(struct tag *tags, char **from)
>   {
>   #ifdef CONFIG_SPARSEMEM
>   	/*
>   	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
>   	 * asm/mach/memory.h for more information).
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->bank[1].start = 0x20000000;
> -	meminfo->bank[1].size = SZ_512M;
> -	meminfo->bank[2].start = 0x80000000;
> -	meminfo->bank[2].size = SZ_256M;
> -	meminfo->nr_banks = 3;
> +
> +	memblock_add(0, SZ_256M);
> +	memblock_add(0x20000000, SZ_512M);
> +	memblock_add(0x80000000, SZ_256M);
>   #else
> -	realview_fixup(tags, from, meminfo);
> +	realview_fixup(tags, from);
>   #endif
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> index f5bc721..0551758 100644
> --- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
> +++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> @@ -21,6 +21,7 @@
>   #include <linux/serial_core.h>
>   #include <linux/platform_device.h>
>   #include <linux/io.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
> index f7ec9c5..aa550f5 100644
> --- a/arch/arm/mach-s3c24xx/mach-vstms.c
> +++ b/arch/arm/mach-s3c24xx/mach-vstms.c
> @@ -22,6 +22,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/nand_ecc.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init vstms_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init vstms_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
> index 8443a27..7dd894e 100644
> --- a/arch/arm/mach-sa1100/assabet.c
> +++ b/arch/arm/mach-sa1100/assabet.c
> @@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
>   }
>   
>   static void __init
> -fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_assabet(struct tag *tags, char **cmdline)
>   {
>   	/* This must be done before any call to machine_has_neponset() */
>   	map_sa1100_gpio_regs();
> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> index 42fc139..a62dadd 100644
> --- a/arch/arm/mm/init.c
> +++ b/arch/arm/mm/init.c
> @@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
>    * initialization functions, as well as show_mem() for the skipping
>    * of holes in the memory map.  It is populated by arm_add_memory().
>    */
> -struct meminfo meminfo;
> -
>   void show_mem(unsigned int filter)
>   {
>   	int free = 0, total = 0, reserved = 0;
> -	int shared = 0, cached = 0, slab = 0, i;
> -	struct meminfo * mi = &meminfo;
> +	int shared = 0, cached = 0, slab = 0;
> +	struct memblock_region *reg;
>   
>   	printk("Mem-info:\n");
>   	show_free_areas(filter);
>   
> -	for_each_bank (i, mi) {
> -		struct membank *bank = &mi->bank[i];
> +	for_each_memblock (memory, reg) {
>   		unsigned int pfn1, pfn2;
>   		struct page *page, *end;
>   
> -		pfn1 = bank_pfn_start(bank);
> -		pfn2 = bank_pfn_end(bank);
> +		pfn1 = memblock_region_memory_base_pfn(reg);
> +		pfn2 = memblock_region_memory_end_pfn(reg);
>   
>   		page = pfn_to_page(pfn1);
>   		end  = pfn_to_page(pfn2 - 1) + 1;
> @@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
>   static void __init find_limits(unsigned long *min, unsigned long *max_low,
>   			       unsigned long *max_high)
>   {
> -	struct meminfo *mi = &meminfo;
> -	int i;
> -
> -	/* This assumes the meminfo array is properly sorted */
> -	*min = bank_pfn_start(&mi->bank[0]);
> -	for_each_bank (i, mi)
> -		if (mi->bank[i].highmem)
> -				break;
> -	*max_low = bank_pfn_end(&mi->bank[i - 1]);
> -	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
> +	*max_low = PFN_DOWN(memblock_get_current_limit());
> +	*min = PFN_UP(memblock_start_of_DRAM());
> +	*max_high = PFN_DOWN(memblock_end_of_DRAM());
>   }
>   
>   #ifdef CONFIG_ZONE_DMA
> @@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
>   	return phys;
>   }
>   
> -void __init arm_memblock_init(struct meminfo *mi,
> -	const struct machine_desc *mdesc)
> +void __init arm_memblock_init(const struct machine_desc *mdesc)
>   {
> -	int i;
> -
> -	for (i = 0; i < mi->nr_banks; i++)
> -		memblock_add(mi->bank[i].start, mi->bank[i].size);
> -
>   	/* Register the kernel text, kernel data and initrd with memblock. */
>   #ifdef CONFIG_XIP_KERNEL
>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);
>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);
> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);
> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +
>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
> +				if (!IS_ALIGNED(block_start, SECTION_SIZE))
> +					memblock_limit = block_start;
> +				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
> +					memblock_limit = block_end;
>   			}
> -		}
> -		j++;
> -	}
> -#ifdef CONFIG_HIGHMEM
> -	if (highmem) {
> -		const char *reason = NULL;
>   
> -		if (cache_is_vipt_aliasing()) {
> -			/*
> -			 * Interactions between kmap and other mappings
> -			 * make highmem support with aliasing VIPT caches
> -			 * rather difficult.
> -			 */
> -			reason = "with VIPT aliasing cache";
> -		}
> -		if (reason) {
> -			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
> -				reason);
> -			while (j > 0 && meminfo.bank[j - 1].highmem)
> -				j--;
>   		}
> +
>   	}
> -#endif
> -	meminfo.nr_banks = j;
> +
>   	high_memory = __va(arm_lowmem_limit - 1) + 1;
>   
>   	/*

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

--
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^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12  8:27     ` Marek Szyprowski
  0 siblings, 0 replies; 26+ messages in thread
From: Marek Szyprowski @ 2014-02-12  8:27 UTC (permalink / raw)
  To: Laura Abbott, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Grygorii Strashko,
	Catalin Marinas, Rob Herring, Ard Biesheuvel, Will Deacon,
	Nicolas Pitre, Santosh Shilimkar, linux-mm, Andrew Morton,
	Courtney Cavin, Grant Likely

Hello,

On 2014-02-11 22:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)
>
> diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
> index 17a3fa2..c43473a 100644
> --- a/arch/arm/include/asm/mach/arch.h
> +++ b/arch/arm/include/asm/mach/arch.h
> @@ -14,7 +14,6 @@
>   #include <linux/reboot.h>
>   
>   struct tag;
> -struct meminfo;
>   struct pt_regs;
>   struct smp_operations;
>   #ifdef CONFIG_SMP
> @@ -47,8 +46,7 @@ struct machine_desc {
>   	enum reboot_mode	reboot_mode;	/* default restart mode	*/
>   	struct smp_operations	*smp;		/* SMP operations	*/
>   	bool			(*smp_init)(void);
> -	void			(*fixup)(struct tag *, char **,
> -					 struct meminfo *);
> +	void			(*fixup)(struct tag *, char **);
>   	void			(*init_meminfo)(void);
>   	void			(*reserve)(void);/* reserve mem blocks	*/
>   	void			(*map_io)(void);/* IO mapping function	*/
> diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
> index c2f5102..bf47a6c 100644
> --- a/arch/arm/include/asm/memblock.h
> +++ b/arch/arm/include/asm/memblock.h
> @@ -1,10 +1,9 @@
>   #ifndef _ASM_ARM_MEMBLOCK_H
>   #define _ASM_ARM_MEMBLOCK_H
>   
> -struct meminfo;
>   struct machine_desc;
>   
> -void arm_memblock_init(struct meminfo *, const struct machine_desc *);
> +void arm_memblock_init(const struct machine_desc *);
>   phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
>   
>   #endif
> diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
> index 8d6a089..0196091 100644
> --- a/arch/arm/include/asm/setup.h
> +++ b/arch/arm/include/asm/setup.h
> @@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
>    */
>   #define NR_BANKS	CONFIG_ARM_NR_BANKS
>   
> -struct membank {
> -	phys_addr_t start;
> -	phys_addr_t size;
> -	unsigned int highmem;
> -};
> -
> -struct meminfo {
> -	int nr_banks;
> -	struct membank bank[NR_BANKS];
> -};
> -
> -extern struct meminfo meminfo;
> -
> -#define for_each_bank(iter,mi)				\
> -	for (iter = 0; iter < (mi)->nr_banks; iter++)
> -
> -#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
> -#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
> -#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
> -#define bank_phys_start(bank)	(bank)->start
> -#define bank_phys_end(bank)	((bank)->start + (bank)->size)
> -#define bank_phys_size(bank)	(bank)->size
> -
>   extern int arm_add_memory(u64 start, u64 size);
>   extern void early_print(const char *str, ...);
>   extern void dump_machine_table(void);
> diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
> index 8c14de8..7807ef5 100644
> --- a/arch/arm/kernel/atags_parse.c
> +++ b/arch/arm/kernel/atags_parse.c
> @@ -22,6 +22,7 @@
>   #include <linux/fs.h>
>   #include <linux/root_dev.h>
>   #include <linux/screen_info.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/system_info.h>
> @@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
>   	}
>   
>   	if (mdesc->fixup)
> -		mdesc->fixup(tags, &from, &meminfo);
> +		mdesc->fixup(tags, &from);
>   
>   	if (tags->hdr.tag == ATAG_CORE) {
> -		if (meminfo.nr_banks != 0)
> +		if (memblock_phys_mem_size())
>   			squash_mem_tags(tags);
>   		save_atags(tags);
>   		parse_tags(tags);
> diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
> index f751714..398cd5f 100644
> --- a/arch/arm/kernel/devtree.c
> +++ b/arch/arm/kernel/devtree.c
> @@ -26,11 +26,6 @@
>   #include <asm/mach/arch.h>
>   #include <asm/mach-types.h>
>   
> -void __init early_init_dt_add_memory_arch(u64 base, u64 size)
> -{
> -	arm_add_memory(base, size);
> -}
> -
>   void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
>   {
>   	return memblock_virt_alloc(size, align);
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 1e8b030..7dd83d0 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -625,15 +625,8 @@ void __init dump_machine_table(void)
>   
>   int __init arm_add_memory(u64 start, u64 size)
>   {
> -	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
>   	u64 aligned_start;
>   
> -	if (meminfo.nr_banks >= NR_BANKS) {
> -		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
> -			(long long)start);
> -		return -EINVAL;
> -	}
> -
>   	/*
>   	 * Ensure that start/size are aligned to a page boundary.
>   	 * Size is appropriately rounded down, start is rounded up.
> @@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
>   		aligned_start = PHYS_OFFSET;
>   	}
>   
> -	bank->start = aligned_start;
> -	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
> +	start = aligned_start;
> +	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
>   
>   	/*
>   	 * Check whether this memory region has non-zero size or
>   	 * invalid node number.
>   	 */
> -	if (bank->size == 0)
> +	if (size == 0)
>   		return -EINVAL;
>   
> -	meminfo.nr_banks++;
> +	memblock_add(start, size);
>   	return 0;
>   }
>   
> @@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
>    * Pick out the memory size.  We look for mem=size@start,
>    * where start and size are "size[KkMm]"
>    */
> +
>   static int __init early_mem(char *p)
>   {
>   	static int usermem __initdata = 0;
> @@ -706,7 +700,8 @@ static int __init early_mem(char *p)
>   	 */
>   	if (usermem == 0) {
>   		usermem = 1;
> -		meminfo.nr_banks = 0;
> +		memblock_remove(memblock_start_of_DRAM(),
> +			memblock_end_of_DRAM() - memblock_start_of_DRAM());
>   	}
>   
>   	start = PHYS_OFFSET;
> @@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
>   static inline void reserve_crashkernel(void) {}
>   #endif /* CONFIG_KEXEC */
>   
> -static int __init meminfo_cmp(const void *_a, const void *_b)
> -{
> -	const struct membank *a = _a, *b = _b;
> -	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
> -	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
> -}
> -
>   void __init hyp_mode_check(void)
>   {
>   #ifdef CONFIG_ARM_VIRT_EXT
> @@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
>   
>   	parse_early_param();
>   
> -	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
> -
>   	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
>   	setup_dma_zone(mdesc);
>   	sanity_check_meminfo();
> -	arm_memblock_init(&meminfo, mdesc);
> +	arm_memblock_init(mdesc);
>   
>   	paging_init(mdesc);
>   	request_standard_resources(mdesc);
> diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
> index b476424..4d04b91 100644
> --- a/arch/arm/mach-clps711x/board-clep7312.c
> +++ b/arch/arm/mach-clps711x/board-clep7312.c
> @@ -18,6 +18,7 @@
>   #include <linux/init.h>
>   #include <linux/types.h>
>   #include <linux/string.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -26,11 +27,9 @@
>   #include "common.h"
>   
>   static void __init
> -fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_clep7312(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = 0x01000000;
> +	memblock_add(0xc0000000, 0x01000000);
>   }
>   
>   MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
> diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
> index fe6184e..b617aa2 100644
> --- a/arch/arm/mach-clps711x/board-edb7211.c
> +++ b/arch/arm/mach-clps711x/board-edb7211.c
> @@ -16,6 +16,7 @@
>   #include <linux/interrupt.h>
>   #include <linux/backlight.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <linux/mtd/physmap.h>
>   #include <linux/mtd/partitions.h>
> @@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
>   }
>   
>   static void __init
> -fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_edb7211(struct tag *tags, char **cmdline)
>   {
>   	/*
>   	 * Bank start addresses are not present in the information
> @@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
>   	 * Banks sizes _are_ present in the param block, but we're
>   	 * not using that information yet.
>   	 */
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = SZ_8M;
> -	mi->bank[1].start = 0xc1000000;
> -	mi->bank[1].size = SZ_8M;
> -	mi->nr_banks = 2;
> +	memblock_add(0xc0000000, SZ_8M);
> +	memblock_add(0xc1000000, SZ_8M);
>   }
>   
>   static void __init edb7211_init(void)
> diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
> index dd81b06..c1c6729 100644
> --- a/arch/arm/mach-clps711x/board-p720t.c
> +++ b/arch/arm/mach-clps711x/board-p720t.c
> @@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
>   };
>   
>   static void __init
> -fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
> +fixup_p720t(struct tag *tag, char **cmdline)
>   {
>   	/*
>   	 * Our bootloader doesn't setup any tags (yet).
> diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
> index 9669cc0..de86ab6 100644
> --- a/arch/arm/mach-footbridge/cats-hw.c
> +++ b/arch/arm/mach-footbridge/cats-hw.c
> @@ -76,7 +76,7 @@ __initcall(cats_hw_init);
>    * hard reboots fail on early boards.
>    */
>   static void __init
> -fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_cats(struct tag *tags, char **cmdline)
>   {
>   	screen_info.orig_video_lines  = 25;
>   	screen_info.orig_video_points = 16;
> diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
> index eb1fa5c..cdee08c 100644
> --- a/arch/arm/mach-footbridge/netwinder-hw.c
> +++ b/arch/arm/mach-footbridge/netwinder-hw.c
> @@ -620,7 +620,7 @@ __initcall(nw_hw_init);
>    * the parameter page.
>    */
>   static void __init
> -fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_netwinder(struct tag *tags, char **cmdline)
>   {
>   #ifdef CONFIG_ISAPNP
>   	extern int isapnp_disable;
> diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
> index a775298..61bfe58 100644
> --- a/arch/arm/mach-msm/board-halibut.c
> +++ b/arch/arm/mach-msm/board-halibut.c
> @@ -83,11 +83,6 @@ static void __init halibut_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init halibut_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> -{
> -}
> -
>   static void __init halibut_map_io(void)
>   {
>   	msm_map_common_io();
> @@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
>   
>   MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
>   	.atag_offset	= 0x100,
> -	.fixup		= halibut_fixup,
>   	.map_io		= halibut_map_io,
>   	.init_early	= halibut_init_early,
>   	.init_irq	= halibut_init_irq,
> diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
> index 7d9981c..873c3ca 100644
> --- a/arch/arm/mach-msm/board-mahimahi.c
> +++ b/arch/arm/mach-msm/board-mahimahi.c
> @@ -22,6 +22,7 @@
>   #include <linux/io.h>
>   #include <linux/kernel.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach-types.h>
>   #include <asm/mach/arch.h>
> @@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 2;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
> -	mi->bank[0].size = (219*1024*1024);
> -	mi->bank[1].start = MSM_HIGHMEM_BASE;
> -	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
> -	mi->bank[1].size = MSM_HIGHMEM_SIZE;
> +	memblock_add(PHYS_OFFSET, 219*SZ_1M);
> +	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
>   }
>   
>   static void __init mahimahi_map_io(void)
> diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
> index 46de789..b621b23 100644
> --- a/arch/arm/mach-msm/board-msm7x30.c
> +++ b/arch/arm/mach-msm/board-msm7x30.c
> @@ -40,8 +40,7 @@
>   #include "proc_comm.h"
>   #include "common.h"
>   
> -static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
> -		struct meminfo *mi)
> +static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
>   {
>   	for (; tag->hdr.size; tag = tag_next(tag))
>   		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
> diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
> index 3276051..e509679 100644
> --- a/arch/arm/mach-msm/board-sapphire.c
> +++ b/arch/arm/mach-msm/board-sapphire.c
> @@ -35,6 +35,7 @@
>   
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include "gpio_chip.h"
>   #include "board-sapphire.h"
> @@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
>   	}
>   };
>   
> -static void __init sapphire_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init sapphire_fixup(struct tag *tags, char **cmdline)
>   {
>   	int smi_sz = parse_tag_smi((const struct tag *)tags);
>   
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
>   	if (smi_sz == 32) {
> -		mi->bank[0].size = (84*1024*1024);
> +		memblock_add(PHYS_OFFSET, 84*SZ_1M);
>   	} else if (smi_sz == 64) {
> -		mi->bank[0].size = (101*1024*1024);
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   	} else {
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   		/* Give a default value when not get smi size */
>   		smi_sz = 64;
> -		mi->bank[0].size = (101*1024*1024);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
> index 015d544..58826cf 100644
> --- a/arch/arm/mach-msm/board-trout.c
> +++ b/arch/arm/mach-msm/board-trout.c
> @@ -19,6 +19,7 @@
>   #include <linux/init.h>
>   #include <linux/platform_device.h>
>   #include <linux/clkdev.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/system_info.h>
>   #include <asm/mach-types.h>
> @@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
>   	msm_init_irq();
>   }
>   
> -static void __init trout_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init trout_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].size = (101*1024*1024);
> +	memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   }
>   
>   static void __init trout_init(void)
> diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
> index 3f1de11..6bbb7b5 100644
> --- a/arch/arm/mach-orion5x/common.c
> +++ b/arch/arm/mach-orion5x/common.c
> @@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
>    * Many orion-based systems have buggy bootloader implementations.
>    * This is a common fixup for bogus memory tags.
>    */
> -void __init tag_fixup_mem32(struct tag *t, char **from,
> -			    struct meminfo *meminfo)
> +void __init tag_fixup_mem32(struct tag *t, char **from)
>   {
>   	for (; t->hdr.size; t = tag_next(t))
>   		if (t->hdr.tag == ATAG_MEM &&
> diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
> index f565f99..175ec4c 100644
> --- a/arch/arm/mach-orion5x/common.h
> +++ b/arch/arm/mach-orion5x/common.h
> @@ -71,9 +71,8 @@ void edmini_v2_init(void);
>   static inline void edmini_v2_init(void) {};
>   #endif
>   
> -struct meminfo;
>   struct tag;
> -extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
> +extern void __init tag_fixup_mem32(struct tag *, char **);
>   
>   /*****************************************************************************
>    * Helpers to access Orion registers
> diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
> index 584439bf..4d3588d 100644
> --- a/arch/arm/mach-pxa/cm-x300.c
> +++ b/arch/arm/mach-pxa/cm-x300.c
> @@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
>   	cm_x300_init_bl();
>   }
>   
> -static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> +static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
>   {
>   	/* Make sure that mi->bank[0].start = PHYS_ADDR */
>   	for (; tags->hdr.size; tags = tag_next(tags))
> diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
> index f162f1b..a763744 100644
> --- a/arch/arm/mach-pxa/corgi.c
> +++ b/arch/arm/mach-pxa/corgi.c
> @@ -33,6 +33,7 @@
>   #include <linux/mtd/sharpsl.h>
>   #include <linux/input/matrix_keypad.h>
>   #include <linux/module.h>
> +#include <linux/memblock.h>
>   #include <video/w100fb.h>
>   
>   #include <asm/setup.h>
> @@ -713,16 +714,13 @@ static void __init corgi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_corgi(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init fixup_corgi(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_corgi())
> -		mi->bank[0].size = (32*1024*1024);
> +		memblock_add(0xa0000000, SZ_32M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_CORGI
> diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
> index 8280ebca..cfb8641 100644
> --- a/arch/arm/mach-pxa/eseries.c
> +++ b/arch/arm/mach-pxa/eseries.c
> @@ -21,6 +21,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
>   #include <linux/usb/gpio_vbus.h>
> +#include <linux/memblock.h>
>   
>   #include <video/w100fb.h>
>   
> @@ -41,14 +42,12 @@
>   #include "clock.h"
>   
>   /* Only e800 has 128MB RAM */
> -void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
> +void __init eseries_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_e800())
> -		mi->bank[0].size = (128*1024*1024);
> +		memblock_add(0xa0000000, SZ_128M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   struct gpio_vbus_mach_info e7xx_udc_info = {
> diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
> index aedf053..1319916 100644
> --- a/arch/arm/mach-pxa/poodle.c
> +++ b/arch/arm/mach-pxa/poodle.c
> @@ -29,6 +29,7 @@
>   #include <linux/spi/ads7846.h>
>   #include <linux/spi/pxa2xx_spi.h>
>   #include <linux/mtd/sharpsl.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/mach-types.h>
> @@ -456,13 +457,10 @@ static void __init poodle_init(void)
>   	poodle_init_spi();
>   }
>   
> -static void __init fixup_poodle(struct tag *tags, char **cmdline,
> -				struct meminfo *mi)
> +static void __init fixup_poodle(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (32*1024*1024);
> +	memblock_add(0xa0000000, SZ_32M);
>   }
>   
>   MACHINE_START(POODLE, "SHARP Poodle")
> diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
> index 0b11c1a..840c3a4 100644
> --- a/arch/arm/mach-pxa/spitz.c
> +++ b/arch/arm/mach-pxa/spitz.c
> @@ -32,6 +32,7 @@
>   #include <linux/io.h>
>   #include <linux/module.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -971,13 +972,10 @@ static void __init spitz_init(void)
>   	spitz_i2c_init();
>   }
>   
> -static void __init spitz_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init spitz_fixup(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_SPITZ
> diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
> index ef5557b..c158a6e 100644
> --- a/arch/arm/mach-pxa/tosa.c
> +++ b/arch/arm/mach-pxa/tosa.c
> @@ -37,6 +37,7 @@
>   #include <linux/i2c/pxa-i2c.h>
>   #include <linux/usb/gpio_vbus.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -960,13 +961,10 @@ static void __init tosa_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_tosa(struct tag *tags, char **cmdline,
> -			      struct meminfo *mi)
> +static void __init fixup_tosa(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   MACHINE_START(TOSA, "SHARP Tosa")
> diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
> index 1d5ee5c..c2fae3a 100644
> --- a/arch/arm/mach-realview/core.c
> +++ b/arch/arm/mach-realview/core.c
> @@ -31,6 +31,7 @@
>   #include <linux/amba/mmci.h>
>   #include <linux/gfp.h>
>   #include <linux/mtd/physmap.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
>   /*
>    * Setup the memory banks.
>    */
> -void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
> +void realview_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
>   	 * Half of this is mirrored at 0.
>   	 */
>   #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
> -	meminfo->bank[0].start = 0x70000000;
> -	meminfo->bank[0].size = SZ_512M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0x70000000, SZ_512M);
>   #else
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_256M);
>   #endif
>   }
> diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
> index 602ca5e..844946d 100644
> --- a/arch/arm/mach-realview/core.h
> +++ b/arch/arm/mach-realview/core.h
> @@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
>   extern int realview_eth_register(const char *name, struct resource *res);
>   extern int realview_usb_register(struct resource *res);
>   extern void realview_init_early(void);
> -extern void realview_fixup(struct tag *tags, char **from,
> -			   struct meminfo *meminfo);
> +extern void realview_fixup(struct tag *tags, char **from);
>   
>   extern struct smp_operations realview_smp_ops;
>   extern void realview_cpu_die(unsigned int cpu);
> diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
> index c5eade7..6abf6a0 100644
> --- a/arch/arm/mach-realview/realview_pb1176.c
> +++ b/arch/arm/mach-realview/realview_pb1176.c
> @@ -32,6 +32,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
>   	dsb();
>   }
>   
> -static void realview_pb1176_fixup(struct tag *tags, char **from,
> -				  struct meminfo *meminfo)
> +static void realview_pb1176_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * RealView PB1176 only has 128MB of RAM mapped at 0.
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_128M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_128M);
>   }
>   
>   static void __init realview_pb1176_init(void)
> diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
> index 9d75493..60d322a 100644
> --- a/arch/arm/mach-realview/realview_pbx.c
> +++ b/arch/arm/mach-realview/realview_pbx.c
> @@ -29,6 +29,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/irq.h>
>   #include <asm/mach-types.h>
> @@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
>   	realview_pbx_twd_init();
>   }
>   
> -static void realview_pbx_fixup(struct tag *tags, char **from,
> -			       struct meminfo *meminfo)
> +static void realview_pbx_fixup(struct tag *tags, char **from)
>   {
>   #ifdef CONFIG_SPARSEMEM
>   	/*
>   	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
>   	 * asm/mach/memory.h for more information).
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->bank[1].start = 0x20000000;
> -	meminfo->bank[1].size = SZ_512M;
> -	meminfo->bank[2].start = 0x80000000;
> -	meminfo->bank[2].size = SZ_256M;
> -	meminfo->nr_banks = 3;
> +
> +	memblock_add(0, SZ_256M);
> +	memblock_add(0x20000000, SZ_512M);
> +	memblock_add(0x80000000, SZ_256M);
>   #else
> -	realview_fixup(tags, from, meminfo);
> +	realview_fixup(tags, from);
>   #endif
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> index f5bc721..0551758 100644
> --- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
> +++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> @@ -21,6 +21,7 @@
>   #include <linux/serial_core.h>
>   #include <linux/platform_device.h>
>   #include <linux/io.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
> index f7ec9c5..aa550f5 100644
> --- a/arch/arm/mach-s3c24xx/mach-vstms.c
> +++ b/arch/arm/mach-s3c24xx/mach-vstms.c
> @@ -22,6 +22,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/nand_ecc.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init vstms_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init vstms_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
> index 8443a27..7dd894e 100644
> --- a/arch/arm/mach-sa1100/assabet.c
> +++ b/arch/arm/mach-sa1100/assabet.c
> @@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
>   }
>   
>   static void __init
> -fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_assabet(struct tag *tags, char **cmdline)
>   {
>   	/* This must be done before any call to machine_has_neponset() */
>   	map_sa1100_gpio_regs();
> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> index 42fc139..a62dadd 100644
> --- a/arch/arm/mm/init.c
> +++ b/arch/arm/mm/init.c
> @@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
>    * initialization functions, as well as show_mem() for the skipping
>    * of holes in the memory map.  It is populated by arm_add_memory().
>    */
> -struct meminfo meminfo;
> -
>   void show_mem(unsigned int filter)
>   {
>   	int free = 0, total = 0, reserved = 0;
> -	int shared = 0, cached = 0, slab = 0, i;
> -	struct meminfo * mi = &meminfo;
> +	int shared = 0, cached = 0, slab = 0;
> +	struct memblock_region *reg;
>   
>   	printk("Mem-info:\n");
>   	show_free_areas(filter);
>   
> -	for_each_bank (i, mi) {
> -		struct membank *bank = &mi->bank[i];
> +	for_each_memblock (memory, reg) {
>   		unsigned int pfn1, pfn2;
>   		struct page *page, *end;
>   
> -		pfn1 = bank_pfn_start(bank);
> -		pfn2 = bank_pfn_end(bank);
> +		pfn1 = memblock_region_memory_base_pfn(reg);
> +		pfn2 = memblock_region_memory_end_pfn(reg);
>   
>   		page = pfn_to_page(pfn1);
>   		end  = pfn_to_page(pfn2 - 1) + 1;
> @@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
>   static void __init find_limits(unsigned long *min, unsigned long *max_low,
>   			       unsigned long *max_high)
>   {
> -	struct meminfo *mi = &meminfo;
> -	int i;
> -
> -	/* This assumes the meminfo array is properly sorted */
> -	*min = bank_pfn_start(&mi->bank[0]);
> -	for_each_bank (i, mi)
> -		if (mi->bank[i].highmem)
> -				break;
> -	*max_low = bank_pfn_end(&mi->bank[i - 1]);
> -	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
> +	*max_low = PFN_DOWN(memblock_get_current_limit());
> +	*min = PFN_UP(memblock_start_of_DRAM());
> +	*max_high = PFN_DOWN(memblock_end_of_DRAM());
>   }
>   
>   #ifdef CONFIG_ZONE_DMA
> @@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
>   	return phys;
>   }
>   
> -void __init arm_memblock_init(struct meminfo *mi,
> -	const struct machine_desc *mdesc)
> +void __init arm_memblock_init(const struct machine_desc *mdesc)
>   {
> -	int i;
> -
> -	for (i = 0; i < mi->nr_banks; i++)
> -		memblock_add(mi->bank[i].start, mi->bank[i].size);
> -
>   	/* Register the kernel text, kernel data and initrd with memblock. */
>   #ifdef CONFIG_XIP_KERNEL
>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);
>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);
> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);
> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +
>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
> +				if (!IS_ALIGNED(block_start, SECTION_SIZE))
> +					memblock_limit = block_start;
> +				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
> +					memblock_limit = block_end;
>   			}
> -		}
> -		j++;
> -	}
> -#ifdef CONFIG_HIGHMEM
> -	if (highmem) {
> -		const char *reason = NULL;
>   
> -		if (cache_is_vipt_aliasing()) {
> -			/*
> -			 * Interactions between kmap and other mappings
> -			 * make highmem support with aliasing VIPT caches
> -			 * rather difficult.
> -			 */
> -			reason = "with VIPT aliasing cache";
> -		}
> -		if (reason) {
> -			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
> -				reason);
> -			while (j > 0 && meminfo.bank[j - 1].highmem)
> -				j--;
>   		}
> +
>   	}
> -#endif
> -	meminfo.nr_banks = j;
> +
>   	high_memory = __va(arm_lowmem_limit - 1) + 1;
>   
>   	/*

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland


^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12  8:27     ` Marek Szyprowski
  0 siblings, 0 replies; 26+ messages in thread
From: Marek Szyprowski @ 2014-02-12  8:27 UTC (permalink / raw)
  To: linux-arm-kernel

Hello,

On 2014-02-11 22:14, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>   33 files changed, 136 insertions(+), 291 deletions(-)
>
> diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
> index 17a3fa2..c43473a 100644
> --- a/arch/arm/include/asm/mach/arch.h
> +++ b/arch/arm/include/asm/mach/arch.h
> @@ -14,7 +14,6 @@
>   #include <linux/reboot.h>
>   
>   struct tag;
> -struct meminfo;
>   struct pt_regs;
>   struct smp_operations;
>   #ifdef CONFIG_SMP
> @@ -47,8 +46,7 @@ struct machine_desc {
>   	enum reboot_mode	reboot_mode;	/* default restart mode	*/
>   	struct smp_operations	*smp;		/* SMP operations	*/
>   	bool			(*smp_init)(void);
> -	void			(*fixup)(struct tag *, char **,
> -					 struct meminfo *);
> +	void			(*fixup)(struct tag *, char **);
>   	void			(*init_meminfo)(void);
>   	void			(*reserve)(void);/* reserve mem blocks	*/
>   	void			(*map_io)(void);/* IO mapping function	*/
> diff --git a/arch/arm/include/asm/memblock.h b/arch/arm/include/asm/memblock.h
> index c2f5102..bf47a6c 100644
> --- a/arch/arm/include/asm/memblock.h
> +++ b/arch/arm/include/asm/memblock.h
> @@ -1,10 +1,9 @@
>   #ifndef _ASM_ARM_MEMBLOCK_H
>   #define _ASM_ARM_MEMBLOCK_H
>   
> -struct meminfo;
>   struct machine_desc;
>   
> -void arm_memblock_init(struct meminfo *, const struct machine_desc *);
> +void arm_memblock_init(const struct machine_desc *);
>   phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align);
>   
>   #endif
> diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
> index 8d6a089..0196091 100644
> --- a/arch/arm/include/asm/setup.h
> +++ b/arch/arm/include/asm/setup.h
> @@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
>    */
>   #define NR_BANKS	CONFIG_ARM_NR_BANKS
>   
> -struct membank {
> -	phys_addr_t start;
> -	phys_addr_t size;
> -	unsigned int highmem;
> -};
> -
> -struct meminfo {
> -	int nr_banks;
> -	struct membank bank[NR_BANKS];
> -};
> -
> -extern struct meminfo meminfo;
> -
> -#define for_each_bank(iter,mi)				\
> -	for (iter = 0; iter < (mi)->nr_banks; iter++)
> -
> -#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
> -#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
> -#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
> -#define bank_phys_start(bank)	(bank)->start
> -#define bank_phys_end(bank)	((bank)->start + (bank)->size)
> -#define bank_phys_size(bank)	(bank)->size
> -
>   extern int arm_add_memory(u64 start, u64 size);
>   extern void early_print(const char *str, ...);
>   extern void dump_machine_table(void);
> diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
> index 8c14de8..7807ef5 100644
> --- a/arch/arm/kernel/atags_parse.c
> +++ b/arch/arm/kernel/atags_parse.c
> @@ -22,6 +22,7 @@
>   #include <linux/fs.h>
>   #include <linux/root_dev.h>
>   #include <linux/screen_info.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/system_info.h>
> @@ -222,10 +223,10 @@ setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
>   	}
>   
>   	if (mdesc->fixup)
> -		mdesc->fixup(tags, &from, &meminfo);
> +		mdesc->fixup(tags, &from);
>   
>   	if (tags->hdr.tag == ATAG_CORE) {
> -		if (meminfo.nr_banks != 0)
> +		if (memblock_phys_mem_size())
>   			squash_mem_tags(tags);
>   		save_atags(tags);
>   		parse_tags(tags);
> diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
> index f751714..398cd5f 100644
> --- a/arch/arm/kernel/devtree.c
> +++ b/arch/arm/kernel/devtree.c
> @@ -26,11 +26,6 @@
>   #include <asm/mach/arch.h>
>   #include <asm/mach-types.h>
>   
> -void __init early_init_dt_add_memory_arch(u64 base, u64 size)
> -{
> -	arm_add_memory(base, size);
> -}
> -
>   void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
>   {
>   	return memblock_virt_alloc(size, align);
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 1e8b030..7dd83d0 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -625,15 +625,8 @@ void __init dump_machine_table(void)
>   
>   int __init arm_add_memory(u64 start, u64 size)
>   {
> -	struct membank *bank = &meminfo.bank[meminfo.nr_banks];
>   	u64 aligned_start;
>   
> -	if (meminfo.nr_banks >= NR_BANKS) {
> -		pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
> -			(long long)start);
> -		return -EINVAL;
> -	}
> -
>   	/*
>   	 * Ensure that start/size are aligned to a page boundary.
>   	 * Size is appropriately rounded down, start is rounded up.
> @@ -674,17 +667,17 @@ int __init arm_add_memory(u64 start, u64 size)
>   		aligned_start = PHYS_OFFSET;
>   	}
>   
> -	bank->start = aligned_start;
> -	bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
> +	start = aligned_start;
> +	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
>   
>   	/*
>   	 * Check whether this memory region has non-zero size or
>   	 * invalid node number.
>   	 */
> -	if (bank->size == 0)
> +	if (size == 0)
>   		return -EINVAL;
>   
> -	meminfo.nr_banks++;
> +	memblock_add(start, size);
>   	return 0;
>   }
>   
> @@ -692,6 +685,7 @@ int __init arm_add_memory(u64 start, u64 size)
>    * Pick out the memory size.  We look for mem=size at start,
>    * where start and size are "size[KkMm]"
>    */
> +
>   static int __init early_mem(char *p)
>   {
>   	static int usermem __initdata = 0;
> @@ -706,7 +700,8 @@ static int __init early_mem(char *p)
>   	 */
>   	if (usermem == 0) {
>   		usermem = 1;
> -		meminfo.nr_banks = 0;
> +		memblock_remove(memblock_start_of_DRAM(),
> +			memblock_end_of_DRAM() - memblock_start_of_DRAM());
>   	}
>   
>   	start = PHYS_OFFSET;
> @@ -851,13 +846,6 @@ static void __init reserve_crashkernel(void)
>   static inline void reserve_crashkernel(void) {}
>   #endif /* CONFIG_KEXEC */
>   
> -static int __init meminfo_cmp(const void *_a, const void *_b)
> -{
> -	const struct membank *a = _a, *b = _b;
> -	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
> -	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
> -}
> -
>   void __init hyp_mode_check(void)
>   {
>   #ifdef CONFIG_ARM_VIRT_EXT
> @@ -900,12 +888,10 @@ void __init setup_arch(char **cmdline_p)
>   
>   	parse_early_param();
>   
> -	sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
> -
>   	early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
>   	setup_dma_zone(mdesc);
>   	sanity_check_meminfo();
> -	arm_memblock_init(&meminfo, mdesc);
> +	arm_memblock_init(mdesc);
>   
>   	paging_init(mdesc);
>   	request_standard_resources(mdesc);
> diff --git a/arch/arm/mach-clps711x/board-clep7312.c b/arch/arm/mach-clps711x/board-clep7312.c
> index b476424..4d04b91 100644
> --- a/arch/arm/mach-clps711x/board-clep7312.c
> +++ b/arch/arm/mach-clps711x/board-clep7312.c
> @@ -18,6 +18,7 @@
>   #include <linux/init.h>
>   #include <linux/types.h>
>   #include <linux/string.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -26,11 +27,9 @@
>   #include "common.h"
>   
>   static void __init
> -fixup_clep7312(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_clep7312(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = 0x01000000;
> +	memblock_add(0xc0000000, 0x01000000);
>   }
>   
>   MACHINE_START(CLEP7212, "Cirrus Logic 7212/7312")
> diff --git a/arch/arm/mach-clps711x/board-edb7211.c b/arch/arm/mach-clps711x/board-edb7211.c
> index fe6184e..b617aa2 100644
> --- a/arch/arm/mach-clps711x/board-edb7211.c
> +++ b/arch/arm/mach-clps711x/board-edb7211.c
> @@ -16,6 +16,7 @@
>   #include <linux/interrupt.h>
>   #include <linux/backlight.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <linux/mtd/physmap.h>
>   #include <linux/mtd/partitions.h>
> @@ -133,7 +134,7 @@ static void __init edb7211_reserve(void)
>   }
>   
>   static void __init
> -fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_edb7211(struct tag *tags, char **cmdline)
>   {
>   	/*
>   	 * Bank start addresses are not present in the information
> @@ -143,11 +144,8 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
>   	 * Banks sizes _are_ present in the param block, but we're
>   	 * not using that information yet.
>   	 */
> -	mi->bank[0].start = 0xc0000000;
> -	mi->bank[0].size = SZ_8M;
> -	mi->bank[1].start = 0xc1000000;
> -	mi->bank[1].size = SZ_8M;
> -	mi->nr_banks = 2;
> +	memblock_add(0xc0000000, SZ_8M);
> +	memblock_add(0xc1000000, SZ_8M);
>   }
>   
>   static void __init edb7211_init(void)
> diff --git a/arch/arm/mach-clps711x/board-p720t.c b/arch/arm/mach-clps711x/board-p720t.c
> index dd81b06..c1c6729 100644
> --- a/arch/arm/mach-clps711x/board-p720t.c
> +++ b/arch/arm/mach-clps711x/board-p720t.c
> @@ -295,7 +295,7 @@ static struct generic_bl_info p720t_lcd_backlight_pdata = {
>   };
>   
>   static void __init
> -fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
> +fixup_p720t(struct tag *tag, char **cmdline)
>   {
>   	/*
>   	 * Our bootloader doesn't setup any tags (yet).
> diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
> index 9669cc0..de86ab6 100644
> --- a/arch/arm/mach-footbridge/cats-hw.c
> +++ b/arch/arm/mach-footbridge/cats-hw.c
> @@ -76,7 +76,7 @@ __initcall(cats_hw_init);
>    * hard reboots fail on early boards.
>    */
>   static void __init
> -fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_cats(struct tag *tags, char **cmdline)
>   {
>   	screen_info.orig_video_lines  = 25;
>   	screen_info.orig_video_points = 16;
> diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
> index eb1fa5c..cdee08c 100644
> --- a/arch/arm/mach-footbridge/netwinder-hw.c
> +++ b/arch/arm/mach-footbridge/netwinder-hw.c
> @@ -620,7 +620,7 @@ __initcall(nw_hw_init);
>    * the parameter page.
>    */
>   static void __init
> -fixup_netwinder(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_netwinder(struct tag *tags, char **cmdline)
>   {
>   #ifdef CONFIG_ISAPNP
>   	extern int isapnp_disable;
> diff --git a/arch/arm/mach-msm/board-halibut.c b/arch/arm/mach-msm/board-halibut.c
> index a775298..61bfe58 100644
> --- a/arch/arm/mach-msm/board-halibut.c
> +++ b/arch/arm/mach-msm/board-halibut.c
> @@ -83,11 +83,6 @@ static void __init halibut_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init halibut_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> -{
> -}
> -
>   static void __init halibut_map_io(void)
>   {
>   	msm_map_common_io();
> @@ -100,7 +95,6 @@ static void __init halibut_init_late(void)
>   
>   MACHINE_START(HALIBUT, "Halibut Board (QCT SURF7200A)")
>   	.atag_offset	= 0x100,
> -	.fixup		= halibut_fixup,
>   	.map_io		= halibut_map_io,
>   	.init_early	= halibut_init_early,
>   	.init_irq	= halibut_init_irq,
> diff --git a/arch/arm/mach-msm/board-mahimahi.c b/arch/arm/mach-msm/board-mahimahi.c
> index 7d9981c..873c3ca 100644
> --- a/arch/arm/mach-msm/board-mahimahi.c
> +++ b/arch/arm/mach-msm/board-mahimahi.c
> @@ -22,6 +22,7 @@
>   #include <linux/io.h>
>   #include <linux/kernel.h>
>   #include <linux/platform_device.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach-types.h>
>   #include <asm/mach/arch.h>
> @@ -52,16 +53,10 @@ static void __init mahimahi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init mahimahi_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init mahimahi_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 2;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
> -	mi->bank[0].size = (219*1024*1024);
> -	mi->bank[1].start = MSM_HIGHMEM_BASE;
> -	mi->bank[1].node = PHYS_TO_NID(MSM_HIGHMEM_BASE);
> -	mi->bank[1].size = MSM_HIGHMEM_SIZE;
> +	memblock_add(PHYS_OFFSET, 219*SZ_1M);
> +	memblock_add(MSM_HIGHMEM_BASE, MSM_HIGHMEM_SIZE);
>   }
>   
>   static void __init mahimahi_map_io(void)
> diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
> index 46de789..b621b23 100644
> --- a/arch/arm/mach-msm/board-msm7x30.c
> +++ b/arch/arm/mach-msm/board-msm7x30.c
> @@ -40,8 +40,7 @@
>   #include "proc_comm.h"
>   #include "common.h"
>   
> -static void __init msm7x30_fixup(struct tag *tag, char **cmdline,
> -		struct meminfo *mi)
> +static void __init msm7x30_fixup(struct tag *tag, char **cmdline)
>   {
>   	for (; tag->hdr.size; tag = tag_next(tag))
>   		if (tag->hdr.tag == ATAG_MEM && tag->u.mem.start == 0x200000) {
> diff --git a/arch/arm/mach-msm/board-sapphire.c b/arch/arm/mach-msm/board-sapphire.c
> index 3276051..e509679 100644
> --- a/arch/arm/mach-msm/board-sapphire.c
> +++ b/arch/arm/mach-msm/board-sapphire.c
> @@ -35,6 +35,7 @@
>   
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include "gpio_chip.h"
>   #include "board-sapphire.h"
> @@ -74,22 +75,18 @@ static struct map_desc sapphire_io_desc[] __initdata = {
>   	}
>   };
>   
> -static void __init sapphire_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init sapphire_fixup(struct tag *tags, char **cmdline)
>   {
>   	int smi_sz = parse_tag_smi((const struct tag *)tags);
>   
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
>   	if (smi_sz == 32) {
> -		mi->bank[0].size = (84*1024*1024);
> +		memblock_add(PHYS_OFFSET, 84*SZ_1M);
>   	} else if (smi_sz == 64) {
> -		mi->bank[0].size = (101*1024*1024);
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   	} else {
> +		memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   		/* Give a default value when not get smi size */
>   		smi_sz = 64;
> -		mi->bank[0].size = (101*1024*1024);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
> index 015d544..58826cf 100644
> --- a/arch/arm/mach-msm/board-trout.c
> +++ b/arch/arm/mach-msm/board-trout.c
> @@ -19,6 +19,7 @@
>   #include <linux/init.h>
>   #include <linux/platform_device.h>
>   #include <linux/clkdev.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/system_info.h>
>   #include <asm/mach-types.h>
> @@ -55,12 +56,9 @@ static void __init trout_init_irq(void)
>   	msm_init_irq();
>   }
>   
> -static void __init trout_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init trout_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = PHYS_OFFSET;
> -	mi->bank[0].size = (101*1024*1024);
> +	memblock_add(PHYS_OFFSET, 101*SZ_1M);
>   }
>   
>   static void __init trout_init(void)
> diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
> index 3f1de11..6bbb7b5 100644
> --- a/arch/arm/mach-orion5x/common.c
> +++ b/arch/arm/mach-orion5x/common.c
> @@ -365,8 +365,7 @@ void orion5x_restart(enum reboot_mode mode, const char *cmd)
>    * Many orion-based systems have buggy bootloader implementations.
>    * This is a common fixup for bogus memory tags.
>    */
> -void __init tag_fixup_mem32(struct tag *t, char **from,
> -			    struct meminfo *meminfo)
> +void __init tag_fixup_mem32(struct tag *t, char **from)
>   {
>   	for (; t->hdr.size; t = tag_next(t))
>   		if (t->hdr.tag == ATAG_MEM &&
> diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
> index f565f99..175ec4c 100644
> --- a/arch/arm/mach-orion5x/common.h
> +++ b/arch/arm/mach-orion5x/common.h
> @@ -71,9 +71,8 @@ void edmini_v2_init(void);
>   static inline void edmini_v2_init(void) {};
>   #endif
>   
> -struct meminfo;
>   struct tag;
> -extern void __init tag_fixup_mem32(struct tag *, char **, struct meminfo *);
> +extern void __init tag_fixup_mem32(struct tag *, char **);
>   
>   /*****************************************************************************
>    * Helpers to access Orion registers
> diff --git a/arch/arm/mach-pxa/cm-x300.c b/arch/arm/mach-pxa/cm-x300.c
> index 584439bf..4d3588d 100644
> --- a/arch/arm/mach-pxa/cm-x300.c
> +++ b/arch/arm/mach-pxa/cm-x300.c
> @@ -837,8 +837,7 @@ static void __init cm_x300_init(void)
>   	cm_x300_init_bl();
>   }
>   
> -static void __init cm_x300_fixup(struct tag *tags, char **cmdline,
> -				 struct meminfo *mi)
> +static void __init cm_x300_fixup(struct tag *tags, char **cmdline)
>   {
>   	/* Make sure that mi->bank[0].start = PHYS_ADDR */
>   	for (; tags->hdr.size; tags = tag_next(tags))
> diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c
> index f162f1b..a763744 100644
> --- a/arch/arm/mach-pxa/corgi.c
> +++ b/arch/arm/mach-pxa/corgi.c
> @@ -33,6 +33,7 @@
>   #include <linux/mtd/sharpsl.h>
>   #include <linux/input/matrix_keypad.h>
>   #include <linux/module.h>
> +#include <linux/memblock.h>
>   #include <video/w100fb.h>
>   
>   #include <asm/setup.h>
> @@ -713,16 +714,13 @@ static void __init corgi_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_corgi(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init fixup_corgi(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_corgi())
> -		mi->bank[0].size = (32*1024*1024);
> +		memblock_add(0xa0000000, SZ_32M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_CORGI
> diff --git a/arch/arm/mach-pxa/eseries.c b/arch/arm/mach-pxa/eseries.c
> index 8280ebca..cfb8641 100644
> --- a/arch/arm/mach-pxa/eseries.c
> +++ b/arch/arm/mach-pxa/eseries.c
> @@ -21,6 +21,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/partitions.h>
>   #include <linux/usb/gpio_vbus.h>
> +#include <linux/memblock.h>
>   
>   #include <video/w100fb.h>
>   
> @@ -41,14 +42,12 @@
>   #include "clock.h"
>   
>   /* Only e800 has 128MB RAM */
> -void __init eseries_fixup(struct tag *tags, char **cmdline, struct meminfo *mi)
> +void __init eseries_fixup(struct tag *tags, char **cmdline)
>   {
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
>   	if (machine_is_e800())
> -		mi->bank[0].size = (128*1024*1024);
> +		memblock_add(0xa0000000, SZ_128M);
>   	else
> -		mi->bank[0].size = (64*1024*1024);
> +		memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   struct gpio_vbus_mach_info e7xx_udc_info = {
> diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
> index aedf053..1319916 100644
> --- a/arch/arm/mach-pxa/poodle.c
> +++ b/arch/arm/mach-pxa/poodle.c
> @@ -29,6 +29,7 @@
>   #include <linux/spi/ads7846.h>
>   #include <linux/spi/pxa2xx_spi.h>
>   #include <linux/mtd/sharpsl.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/mach-types.h>
> @@ -456,13 +457,10 @@ static void __init poodle_init(void)
>   	poodle_init_spi();
>   }
>   
> -static void __init fixup_poodle(struct tag *tags, char **cmdline,
> -				struct meminfo *mi)
> +static void __init fixup_poodle(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (32*1024*1024);
> +	memblock_add(0xa0000000, SZ_32M);
>   }
>   
>   MACHINE_START(POODLE, "SHARP Poodle")
> diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
> index 0b11c1a..840c3a4 100644
> --- a/arch/arm/mach-pxa/spitz.c
> +++ b/arch/arm/mach-pxa/spitz.c
> @@ -32,6 +32,7 @@
>   #include <linux/io.h>
>   #include <linux/module.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -971,13 +972,10 @@ static void __init spitz_init(void)
>   	spitz_i2c_init();
>   }
>   
> -static void __init spitz_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init spitz_fixup(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks = 1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   #ifdef CONFIG_MACH_SPITZ
> diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
> index ef5557b..c158a6e 100644
> --- a/arch/arm/mach-pxa/tosa.c
> +++ b/arch/arm/mach-pxa/tosa.c
> @@ -37,6 +37,7 @@
>   #include <linux/i2c/pxa-i2c.h>
>   #include <linux/usb/gpio_vbus.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/setup.h>
>   #include <asm/mach-types.h>
> @@ -960,13 +961,10 @@ static void __init tosa_init(void)
>   	platform_add_devices(devices, ARRAY_SIZE(devices));
>   }
>   
> -static void __init fixup_tosa(struct tag *tags, char **cmdline,
> -			      struct meminfo *mi)
> +static void __init fixup_tosa(struct tag *tags, char **cmdline)
>   {
>   	sharpsl_save_param();
> -	mi->nr_banks=1;
> -	mi->bank[0].start = 0xa0000000;
> -	mi->bank[0].size = (64*1024*1024);
> +	memblock_add(0xa0000000, SZ_64M);
>   }
>   
>   MACHINE_START(TOSA, "SHARP Tosa")
> diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
> index 1d5ee5c..c2fae3a 100644
> --- a/arch/arm/mach-realview/core.c
> +++ b/arch/arm/mach-realview/core.c
> @@ -31,6 +31,7 @@
>   #include <linux/amba/mmci.h>
>   #include <linux/gfp.h>
>   #include <linux/mtd/physmap.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -370,19 +371,15 @@ void __init realview_timer_init(unsigned int timer_irq)
>   /*
>    * Setup the memory banks.
>    */
> -void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
> +void realview_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
>   	 * Half of this is mirrored at 0.
>   	 */
>   #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
> -	meminfo->bank[0].start = 0x70000000;
> -	meminfo->bank[0].size = SZ_512M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0x70000000, SZ_512M);
>   #else
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_256M);
>   #endif
>   }
> diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
> index 602ca5e..844946d 100644
> --- a/arch/arm/mach-realview/core.h
> +++ b/arch/arm/mach-realview/core.h
> @@ -51,8 +51,7 @@ extern int realview_flash_register(struct resource *res, u32 num);
>   extern int realview_eth_register(const char *name, struct resource *res);
>   extern int realview_usb_register(struct resource *res);
>   extern void realview_init_early(void);
> -extern void realview_fixup(struct tag *tags, char **from,
> -			   struct meminfo *meminfo);
> +extern void realview_fixup(struct tag *tags, char **from);
>   
>   extern struct smp_operations realview_smp_ops;
>   extern void realview_cpu_die(unsigned int cpu);
> diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
> index c5eade7..6abf6a0 100644
> --- a/arch/arm/mach-realview/realview_pb1176.c
> +++ b/arch/arm/mach-realview/realview_pb1176.c
> @@ -32,6 +32,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <mach/hardware.h>
>   #include <asm/irq.h>
> @@ -339,15 +340,12 @@ static void realview_pb1176_restart(enum reboot_mode mode, const char *cmd)
>   	dsb();
>   }
>   
> -static void realview_pb1176_fixup(struct tag *tags, char **from,
> -				  struct meminfo *meminfo)
> +static void realview_pb1176_fixup(struct tag *tags, char **from)
>   {
>   	/*
>   	 * RealView PB1176 only has 128MB of RAM mapped at 0.
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_128M;
> -	meminfo->nr_banks = 1;
> +	memblock_add(0, SZ_128M);
>   }
>   
>   static void __init realview_pb1176_init(void)
> diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
> index 9d75493..60d322a 100644
> --- a/arch/arm/mach-realview/realview_pbx.c
> +++ b/arch/arm/mach-realview/realview_pbx.c
> @@ -29,6 +29,7 @@
>   #include <linux/irqchip/arm-gic.h>
>   #include <linux/platform_data/clk-realview.h>
>   #include <linux/reboot.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/irq.h>
>   #include <asm/mach-types.h>
> @@ -325,23 +326,19 @@ static void __init realview_pbx_timer_init(void)
>   	realview_pbx_twd_init();
>   }
>   
> -static void realview_pbx_fixup(struct tag *tags, char **from,
> -			       struct meminfo *meminfo)
> +static void realview_pbx_fixup(struct tag *tags, char **from)
>   {
>   #ifdef CONFIG_SPARSEMEM
>   	/*
>   	 * Memory configuration with SPARSEMEM enabled on RealView PBX (see
>   	 * asm/mach/memory.h for more information).
>   	 */
> -	meminfo->bank[0].start = 0;
> -	meminfo->bank[0].size = SZ_256M;
> -	meminfo->bank[1].start = 0x20000000;
> -	meminfo->bank[1].size = SZ_512M;
> -	meminfo->bank[2].start = 0x80000000;
> -	meminfo->bank[2].size = SZ_256M;
> -	meminfo->nr_banks = 3;
> +
> +	memblock_add(0, SZ_256M);
> +	memblock_add(0x20000000, SZ_512M);
> +	memblock_add(0x80000000, SZ_256M);
>   #else
> -	realview_fixup(tags, from, meminfo);
> +	realview_fixup(tags, from);
>   #endif
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> index f5bc721..0551758 100644
> --- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
> +++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
> @@ -21,6 +21,7 @@
>   #include <linux/serial_core.h>
>   #include <linux/platform_device.h>
>   #include <linux/io.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -93,13 +94,10 @@ static struct platform_device *smdk2413_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init smdk2413_fixup(struct tag *tags, char **cmdline,
> -				  struct meminfo *mi)
> +static void __init smdk2413_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
> index f7ec9c5..aa550f5 100644
> --- a/arch/arm/mach-s3c24xx/mach-vstms.c
> +++ b/arch/arm/mach-s3c24xx/mach-vstms.c
> @@ -22,6 +22,7 @@
>   #include <linux/mtd/nand.h>
>   #include <linux/mtd/nand_ecc.h>
>   #include <linux/mtd/partitions.h>
> +#include <linux/memblock.h>
>   
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -129,13 +130,10 @@ static struct platform_device *vstms_devices[] __initdata = {
>   	&s3c2412_device_dma,
>   };
>   
> -static void __init vstms_fixup(struct tag *tags, char **cmdline,
> -			       struct meminfo *mi)
> +static void __init vstms_fixup(struct tag *tags, char **cmdline)
>   {
>   	if (tags != phys_to_virt(S3C2410_SDRAM_PA + 0x100)) {
> -		mi->nr_banks=1;
> -		mi->bank[0].start = 0x30000000;
> -		mi->bank[0].size = SZ_64M;
> +		memblock_add(0x30000000, SZ_64M);
>   	}
>   }
>   
> diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
> index 8443a27..7dd894e 100644
> --- a/arch/arm/mach-sa1100/assabet.c
> +++ b/arch/arm/mach-sa1100/assabet.c
> @@ -531,7 +531,7 @@ static void __init get_assabet_scr(void)
>   }
>   
>   static void __init
> -fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
> +fixup_assabet(struct tag *tags, char **cmdline)
>   {
>   	/* This must be done before any call to machine_has_neponset() */
>   	map_sa1100_gpio_regs();
> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> index 42fc139..a62dadd 100644
> --- a/arch/arm/mm/init.c
> +++ b/arch/arm/mm/init.c
> @@ -81,24 +81,21 @@ __tagtable(ATAG_INITRD2, parse_tag_initrd2);
>    * initialization functions, as well as show_mem() for the skipping
>    * of holes in the memory map.  It is populated by arm_add_memory().
>    */
> -struct meminfo meminfo;
> -
>   void show_mem(unsigned int filter)
>   {
>   	int free = 0, total = 0, reserved = 0;
> -	int shared = 0, cached = 0, slab = 0, i;
> -	struct meminfo * mi = &meminfo;
> +	int shared = 0, cached = 0, slab = 0;
> +	struct memblock_region *reg;
>   
>   	printk("Mem-info:\n");
>   	show_free_areas(filter);
>   
> -	for_each_bank (i, mi) {
> -		struct membank *bank = &mi->bank[i];
> +	for_each_memblock (memory, reg) {
>   		unsigned int pfn1, pfn2;
>   		struct page *page, *end;
>   
> -		pfn1 = bank_pfn_start(bank);
> -		pfn2 = bank_pfn_end(bank);
> +		pfn1 = memblock_region_memory_base_pfn(reg);
> +		pfn2 = memblock_region_memory_end_pfn(reg);
>   
>   		page = pfn_to_page(pfn1);
>   		end  = pfn_to_page(pfn2 - 1) + 1;
> @@ -130,16 +127,9 @@ void show_mem(unsigned int filter)
>   static void __init find_limits(unsigned long *min, unsigned long *max_low,
>   			       unsigned long *max_high)
>   {
> -	struct meminfo *mi = &meminfo;
> -	int i;
> -
> -	/* This assumes the meminfo array is properly sorted */
> -	*min = bank_pfn_start(&mi->bank[0]);
> -	for_each_bank (i, mi)
> -		if (mi->bank[i].highmem)
> -				break;
> -	*max_low = bank_pfn_end(&mi->bank[i - 1]);
> -	*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
> +	*max_low = PFN_DOWN(memblock_get_current_limit());
> +	*min = PFN_UP(memblock_start_of_DRAM());
> +	*max_high = PFN_DOWN(memblock_end_of_DRAM());
>   }
>   
>   #ifdef CONFIG_ZONE_DMA
> @@ -275,14 +265,8 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
>   	return phys;
>   }
>   
> -void __init arm_memblock_init(struct meminfo *mi,
> -	const struct machine_desc *mdesc)
> +void __init arm_memblock_init(const struct machine_desc *mdesc)
>   {
> -	int i;
> -
> -	for (i = 0; i < mi->nr_banks; i++)
> -		memblock_add(mi->bank[i].start, mi->bank[i].size);
> -
>   	/* Register the kernel text, kernel data and initrd with memblock. */
>   #ifdef CONFIG_XIP_KERNEL
>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);
>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);
> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);
> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +
>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
> +				if (!IS_ALIGNED(block_start, SECTION_SIZE))
> +					memblock_limit = block_start;
> +				else if (!IS_ALIGNED(block_end, SECTION_SIZE))
> +					memblock_limit = block_end;
>   			}
> -		}
> -		j++;
> -	}
> -#ifdef CONFIG_HIGHMEM
> -	if (highmem) {
> -		const char *reason = NULL;
>   
> -		if (cache_is_vipt_aliasing()) {
> -			/*
> -			 * Interactions between kmap and other mappings
> -			 * make highmem support with aliasing VIPT caches
> -			 * rather difficult.
> -			 */
> -			reason = "with VIPT aliasing cache";
> -		}
> -		if (reason) {
> -			printk(KERN_CRIT "HIGHMEM is not supported %s, ignoring high memory\n",
> -				reason);
> -			while (j > 0 && meminfo.bank[j - 1].highmem)
> -				j--;
>   		}
> +
>   	}
> -#endif
> -	meminfo.nr_banks = j;
> +
>   	high_memory = __va(arm_lowmem_limit - 1) + 1;
>   
>   	/*

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-11 21:14   ` Laura Abbott
  (?)
@ 2014-02-12 15:09     ` Grygorii Strashko
  -1 siblings, 0 replies; 26+ messages in thread
From: Grygorii Strashko @ 2014-02-12 15:09 UTC (permalink / raw)
  To: Laura Abbott, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Catalin Marinas,
	Rob Herring, Ard Biesheuvel, Will Deacon, Nicolas Pitre,
	Santosh Shilimkar, linux-mm, Andrew Morton, Courtney Cavin,
	Marek Szyprowski, Grant Likely

Hi Laura,

On 02/11/2014 11:14 PM, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
> 
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------

The arch/arm/mm/nommu.c has to be updated too :)

[...]

I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
and got following results:

- without your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

 - without your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
                                                                          ^printout changed
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

Keystone mem defined as: from@0x80000000 size@0x40000000 (LPAE=OFF)

As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
some issues &side effects changes at least in printouts - see below.

>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);

memblock_region_memory_base_pfn() can be used here.

>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),

I think, start + __phys_to_pfn(reg->size) can be replaced by
memblock_region_memory_end_pfn().

> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);

The wrong size is used here, should be => memblock_remove(block_start, reg->size);
or => memblock_remove(block_start, size_limit);

> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);

Pls, change it back to show new RAM limit instead of size.
pr_notice("Truncating RAM at %pa-%pa to -%pa",
				&block_start, &block_end, &vmalloc_limit);


> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +

if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
non existent memory address.

Seems, it should be:
  arm_lowmem_limit = block_end;

>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
[...]

Thanks for your patience :)

Regards,
-grygorii

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^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12 15:09     ` Grygorii Strashko
  0 siblings, 0 replies; 26+ messages in thread
From: Grygorii Strashko @ 2014-02-12 15:09 UTC (permalink / raw)
  To: Laura Abbott, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Catalin Marinas,
	Rob Herring, Ard Biesheuvel, Will Deacon, Nicolas Pitre,
	Santosh Shilimkar, linux-mm, Andrew Morton, Courtney Cavin,
	Marek Szyprowski, Grant Likely

Hi Laura,

On 02/11/2014 11:14 PM, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
> 
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------

The arch/arm/mm/nommu.c has to be updated too :)

[...]

I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
and got following results:

- without your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

 - without your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
                                                                          ^printout changed
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

Keystone mem defined as: from@0x80000000 size@0x40000000 (LPAE=OFF)

As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
some issues &side effects changes at least in printouts - see below.

>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);

memblock_region_memory_base_pfn() can be used here.

>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),

I think, start + __phys_to_pfn(reg->size) can be replaced by
memblock_region_memory_end_pfn().

> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);

The wrong size is used here, should be => memblock_remove(block_start, reg->size);
or => memblock_remove(block_start, size_limit);

> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);

Pls, change it back to show new RAM limit instead of size.
pr_notice("Truncating RAM at %pa-%pa to -%pa",
				&block_start, &block_end, &vmalloc_limit);


> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +

if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
non existent memory address.

Seems, it should be:
  arm_lowmem_limit = block_end;

>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
[...]

Thanks for your patience :)

Regards,
-grygorii


^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-12 15:09     ` Grygorii Strashko
  0 siblings, 0 replies; 26+ messages in thread
From: Grygorii Strashko @ 2014-02-12 15:09 UTC (permalink / raw)
  To: linux-arm-kernel

Hi Laura,

On 02/11/2014 11:14 PM, Laura Abbott wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
> 
> Acked-by: Jason Cooper <jason@lakedaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
> ---
>   arch/arm/include/asm/mach/arch.h         |    4 +-
>   arch/arm/include/asm/memblock.h          |    3 +-
>   arch/arm/include/asm/setup.h             |   23 ------
>   arch/arm/kernel/atags_parse.c            |    5 +-
>   arch/arm/kernel/devtree.c                |    5 --
>   arch/arm/kernel/setup.c                  |   30 ++------
>   arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>   arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>   arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>   arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>   arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>   arch/arm/mach-msm/board-halibut.c        |    6 --
>   arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>   arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>   arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>   arch/arm/mach-msm/board-trout.c          |    8 +--
>   arch/arm/mach-orion5x/common.c           |    3 +-
>   arch/arm/mach-orion5x/common.h           |    3 +-
>   arch/arm/mach-pxa/cm-x300.c              |    3 +-
>   arch/arm/mach-pxa/corgi.c                |   10 +--
>   arch/arm/mach-pxa/eseries.c              |    9 +--
>   arch/arm/mach-pxa/poodle.c               |    8 +--
>   arch/arm/mach-pxa/spitz.c                |    8 +--
>   arch/arm/mach-pxa/tosa.c                 |    8 +--
>   arch/arm/mach-realview/core.c            |   11 +--
>   arch/arm/mach-realview/core.h            |    3 +-
>   arch/arm/mach-realview/realview_pb1176.c |    8 +--
>   arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>   arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>   arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>   arch/arm/mach-sa1100/assabet.c           |    2 +-
>   arch/arm/mm/init.c                       |   67 +++++++-----------
>   arch/arm/mm/mmu.c                        |  115 +++++++++---------------------

The arch/arm/mm/nommu.c has to be updated too :)

[...]

I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
and got following results:

- without your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

 - without your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=ON
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

- with your change + HIGHMEM=OFF
[    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
                                                                          ^printout changed
[    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000

Keystone mem defined as: from at 0x80000000 size at 0x40000000 (LPAE=OFF)

As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
some issues &side effects changes at least in printouts - see below.

>   	memblock_reserve(__pa(_sdata), _end - _sdata);
> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>   /*
>    * The mem_map array can get very big.  Free the unused area of the memory map.
>    */
> -static void __init free_unused_memmap(struct meminfo *mi)
> +static void __init free_unused_memmap(void)
>   {
> -	unsigned long bank_start, prev_bank_end = 0;
> -	unsigned int i;
> +	unsigned long start, prev_end = 0;
> +	struct memblock_region *reg;
>   
>   	/*
>   	 * This relies on each bank being in address order.
>   	 * The banks are sorted previously in bootmem_init().
>   	 */
> -	for_each_bank(i, mi) {
> -		struct membank *bank = &mi->bank[i];
> -
> -		bank_start = bank_pfn_start(bank);
> +	for_each_memblock(memory, reg) {
> +		start = __phys_to_pfn(reg->base);

memblock_region_memory_base_pfn() can be used here.

>   
>   #ifdef CONFIG_SPARSEMEM
>   		/*
>   		 * Take care not to free memmap entries that don't exist
>   		 * due to SPARSEMEM sections which aren't present.
>   		 */
> -		bank_start = min(bank_start,
> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +		start = min(start,
> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>   #else
>   		/*
>   		 * Align down here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank start aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>   #endif
>   		/*
>   		 * If we had a previous bank, and there is a space
>   		 * between the current bank and the previous, free it.
>   		 */
> -		if (prev_bank_end && prev_bank_end < bank_start)
> -			free_memmap(prev_bank_end, bank_start);
> +		if (prev_end && prev_end < start)
> +			free_memmap(prev_end, start);
>   
>   		/*
>   		 * Align up here since the VM subsystem insists that the
>   		 * memmap entries are valid from the bank end aligned to
>   		 * MAX_ORDER_NR_PAGES.
>   		 */
> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),

I think, start + __phys_to_pfn(reg->size) can be replaced by
memblock_region_memory_end_pfn().

> +				 MAX_ORDER_NR_PAGES);
>   	}
>   
>   #ifdef CONFIG_SPARSEMEM
> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
> -		free_memmap(prev_bank_end,
> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
> +		free_memmap(prev_end,
> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>   #endif
>   }
>   
> @@ -536,7 +519,7 @@ void __init mem_init(void)
>   	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>   
>   	/* this will put all unused low memory onto the freelists */
> -	free_unused_memmap(&meminfo);
> +	free_unused_memmap();
>   	free_all_bootmem();
>   
>   #ifdef CONFIG_SA1111
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 4f08c13..23433ef 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>   void __init sanity_check_meminfo(void)
>   {
>   	phys_addr_t memblock_limit = 0;
> -	int i, j, highmem = 0;
> +	int highmem = 0;
>   	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
> +	struct memblock_region *reg;
>   
> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
> -		struct membank *bank = &meminfo.bank[j];
> -		phys_addr_t size_limit;
> -
> -		*bank = meminfo.bank[i];
> -		size_limit = bank->size;
> +	for_each_memblock(memory, reg) {
> +		phys_addr_t block_start = reg->base;
> +		phys_addr_t block_end = reg->base + reg->size;
> +		phys_addr_t size_limit = reg->size;
>   
> -		if (bank->start >= vmalloc_limit)
> +		if (reg->base >= vmalloc_limit)
>   			highmem = 1;
>   		else
> -			size_limit = vmalloc_limit - bank->start;
> +			size_limit = vmalloc_limit - reg->base;
>   
> -		bank->highmem = highmem;
>   
> -#ifdef CONFIG_HIGHMEM
> -		/*
> -		 * Split those memory banks which are partially overlapping
> -		 * the vmalloc area greatly simplifying things later.
> -		 */
> -		if (!highmem && bank->size > size_limit) {
> -			if (meminfo.nr_banks >= NR_BANKS) {
> -				printk(KERN_CRIT "NR_BANKS too low, "
> -						 "ignoring high memory\n");
> -			} else {
> -				memmove(bank + 1, bank,
> -					(meminfo.nr_banks - i) * sizeof(*bank));
> -				meminfo.nr_banks++;
> -				i++;
> -				bank[1].size -= size_limit;
> -				bank[1].start = vmalloc_limit;
> -				bank[1].highmem = highmem = 1;
> -				j++;
> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
> +
> +			if (highmem) {
> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
> +					&block_start, &block_end);
> +				memblock_remove(block_start, block_end);

The wrong size is used here, should be => memblock_remove(block_start, reg->size);
or => memblock_remove(block_start, size_limit);

> +				continue;
>   			}
> -			bank->size = size_limit;
> -		}
> -#else
> -		/*
> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
> -		 */
> -		if (highmem) {
> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
> -			       "(!CONFIG_HIGHMEM).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1);
> -			continue;
> -		}
>   
> -		/*
> -		 * Check whether this memory bank would partially overlap
> -		 * the vmalloc area.
> -		 */
> -		if (bank->size > size_limit) {
> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
> -			       "to -%.8llx (vmalloc region overlap).\n",
> -			       (unsigned long long)bank->start,
> -			       (unsigned long long)bank->start + bank->size - 1,
> -			       (unsigned long long)bank->start + size_limit - 1);
> -			bank->size = size_limit;
> +			if (reg->size > size_limit) {
> +				phys_addr_t overlap_size = reg->size - size_limit;
> +
> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
> +					&block_start, &block_end, &overlap_size);

Pls, change it back to show new RAM limit instead of size.
pr_notice("Truncating RAM at %pa-%pa to -%pa",
				&block_start, &block_end, &vmalloc_limit);


> +				memblock_remove(vmalloc_limit, overlap_size);
> +				block_end = vmalloc_limit;
> +			}
>   		}
> -#endif
> -		if (!bank->highmem) {
> -			phys_addr_t bank_end = bank->start + bank->size;
>   
> -			if (bank_end > arm_lowmem_limit)
> -				arm_lowmem_limit = bank_end;
> +		if (!highmem) {
> +			if (block_end > arm_lowmem_limit)
> +				arm_lowmem_limit = reg->base + size_limit;
> +

if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
non existent memory address.

Seems, it should be:
  arm_lowmem_limit = block_end;

>   
>   			/*
>   			 * Find the first non-section-aligned page, and point
> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>   			 * occurs before any free memory is mapped.
>   			 */
>   			if (!memblock_limit) {
> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
> -					memblock_limit = bank->start;
> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
> -					memblock_limit = bank_end;
[...]

Thanks for your patience :)

Regards,
-grygorii

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
  2014-02-12 15:09     ` Grygorii Strashko
  (?)
@ 2014-02-13  2:17       ` Laura Abbott
  -1 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-13  2:17 UTC (permalink / raw)
  To: Grygorii Strashko, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Catalin Marinas,
	Rob Herring, Ard Biesheuvel, Will Deacon, Nicolas Pitre,
	Santosh Shilimkar, linux-mm, Andrew Morton, Courtney Cavin,
	Marek Szyprowski, Grant Likely

On 2/12/2014 7:09 AM, Grygorii Strashko wrote:
> Hi Laura,
>
> On 02/11/2014 11:14 PM, Laura Abbott wrote:
>> memblock is now fully integrated into the kernel and is the prefered
>> method for tracking memory. Rather than reinvent the wheel with
>> meminfo, migrate to using memblock directly instead of meminfo as
>> an intermediate.
>>
>> Acked-by: Jason Cooper <jason@lakedaemon.net>
>> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
>> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
>> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
>> ---
>>    arch/arm/include/asm/mach/arch.h         |    4 +-
>>    arch/arm/include/asm/memblock.h          |    3 +-
>>    arch/arm/include/asm/setup.h             |   23 ------
>>    arch/arm/kernel/atags_parse.c            |    5 +-
>>    arch/arm/kernel/devtree.c                |    5 --
>>    arch/arm/kernel/setup.c                  |   30 ++------
>>    arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>>    arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>>    arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>>    arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>>    arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>>    arch/arm/mach-msm/board-halibut.c        |    6 --
>>    arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>>    arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>>    arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>>    arch/arm/mach-msm/board-trout.c          |    8 +--
>>    arch/arm/mach-orion5x/common.c           |    3 +-
>>    arch/arm/mach-orion5x/common.h           |    3 +-
>>    arch/arm/mach-pxa/cm-x300.c              |    3 +-
>>    arch/arm/mach-pxa/corgi.c                |   10 +--
>>    arch/arm/mach-pxa/eseries.c              |    9 +--
>>    arch/arm/mach-pxa/poodle.c               |    8 +--
>>    arch/arm/mach-pxa/spitz.c                |    8 +--
>>    arch/arm/mach-pxa/tosa.c                 |    8 +--
>>    arch/arm/mach-realview/core.c            |   11 +--
>>    arch/arm/mach-realview/core.h            |    3 +-
>>    arch/arm/mach-realview/realview_pb1176.c |    8 +--
>>    arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>>    arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>>    arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>>    arch/arm/mach-sa1100/assabet.c           |    2 +-
>>    arch/arm/mm/init.c                       |   67 +++++++-----------
>>    arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>
> The arch/arm/mm/nommu.c has to be updated too :)
>

Sure does.

> [...]
>
> I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
> and got following results:
>
> - without your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
>   - without your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
>                                                                            ^printout changed
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> Keystone mem defined as: from@0x80000000 size@0x40000000 (LPAE=OFF)
>
> As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
> some issues &side effects changes at least in printouts - see below.
>
>>    	memblock_reserve(__pa(_sdata), _end - _sdata);
>> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>>    /*
>>     * The mem_map array can get very big.  Free the unused area of the memory map.
>>     */
>> -static void __init free_unused_memmap(struct meminfo *mi)
>> +static void __init free_unused_memmap(void)
>>    {
>> -	unsigned long bank_start, prev_bank_end = 0;
>> -	unsigned int i;
>> +	unsigned long start, prev_end = 0;
>> +	struct memblock_region *reg;
>>
>>    	/*
>>    	 * This relies on each bank being in address order.
>>    	 * The banks are sorted previously in bootmem_init().
>>    	 */
>> -	for_each_bank(i, mi) {
>> -		struct membank *bank = &mi->bank[i];
>> -
>> -		bank_start = bank_pfn_start(bank);
>> +	for_each_memblock(memory, reg) {
>> +		start = __phys_to_pfn(reg->base);
>
> memblock_region_memory_base_pfn() can be used here.
>

Okay

>>
>>    #ifdef CONFIG_SPARSEMEM
>>    		/*
>>    		 * Take care not to free memmap entries that don't exist
>>    		 * due to SPARSEMEM sections which aren't present.
>>    		 */
>> -		bank_start = min(bank_start,
>> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +		start = min(start,
>> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>>    #else
>>    		/*
>>    		 * Align down here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank start aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
>> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>>    #endif
>>    		/*
>>    		 * If we had a previous bank, and there is a space
>>    		 * between the current bank and the previous, free it.
>>    		 */
>> -		if (prev_bank_end && prev_bank_end < bank_start)
>> -			free_memmap(prev_bank_end, bank_start);
>> +		if (prev_end && prev_end < start)
>> +			free_memmap(prev_end, start);
>>
>>    		/*
>>    		 * Align up here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank end aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
>> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
>
> I think, start + __phys_to_pfn(reg->size) can be replaced by
> memblock_region_memory_end_pfn().
>

Okay

>> +				 MAX_ORDER_NR_PAGES);
>>    	}
>>
>>    #ifdef CONFIG_SPARSEMEM
>> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
>> -		free_memmap(prev_bank_end,
>> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
>> +		free_memmap(prev_end,
>> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>>    #endif
>>    }
>>
>> @@ -536,7 +519,7 @@ void __init mem_init(void)
>>    	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>>
>>    	/* this will put all unused low memory onto the freelists */
>> -	free_unused_memmap(&meminfo);
>> +	free_unused_memmap();
>>    	free_all_bootmem();
>>
>>    #ifdef CONFIG_SA1111
>> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
>> index 4f08c13..23433ef 100644
>> --- a/arch/arm/mm/mmu.c
>> +++ b/arch/arm/mm/mmu.c
>> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>>    void __init sanity_check_meminfo(void)
>>    {
>>    	phys_addr_t memblock_limit = 0;
>> -	int i, j, highmem = 0;
>> +	int highmem = 0;
>>    	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
>> +	struct memblock_region *reg;
>>
>> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
>> -		struct membank *bank = &meminfo.bank[j];
>> -		phys_addr_t size_limit;
>> -
>> -		*bank = meminfo.bank[i];
>> -		size_limit = bank->size;
>> +	for_each_memblock(memory, reg) {
>> +		phys_addr_t block_start = reg->base;
>> +		phys_addr_t block_end = reg->base + reg->size;
>> +		phys_addr_t size_limit = reg->size;
>>
>> -		if (bank->start >= vmalloc_limit)
>> +		if (reg->base >= vmalloc_limit)
>>    			highmem = 1;
>>    		else
>> -			size_limit = vmalloc_limit - bank->start;
>> +			size_limit = vmalloc_limit - reg->base;
>>
>> -		bank->highmem = highmem;
>>
>> -#ifdef CONFIG_HIGHMEM
>> -		/*
>> -		 * Split those memory banks which are partially overlapping
>> -		 * the vmalloc area greatly simplifying things later.
>> -		 */
>> -		if (!highmem && bank->size > size_limit) {
>> -			if (meminfo.nr_banks >= NR_BANKS) {
>> -				printk(KERN_CRIT "NR_BANKS too low, "
>> -						 "ignoring high memory\n");
>> -			} else {
>> -				memmove(bank + 1, bank,
>> -					(meminfo.nr_banks - i) * sizeof(*bank));
>> -				meminfo.nr_banks++;
>> -				i++;
>> -				bank[1].size -= size_limit;
>> -				bank[1].start = vmalloc_limit;
>> -				bank[1].highmem = highmem = 1;
>> -				j++;
>> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
>> +
>> +			if (highmem) {
>> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
>> +					&block_start, &block_end);
>> +				memblock_remove(block_start, block_end);
>
> The wrong size is used here, should be => memblock_remove(block_start, reg->size);
> or => memblock_remove(block_start, size_limit);
>

Yes, you are correct. I'm guessing I meant to do block_end-block_start 
and missed the last part.

>> +				continue;
>>    			}
>> -			bank->size = size_limit;
>> -		}
>> -#else
>> -		/*
>> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
>> -		 */
>> -		if (highmem) {
>> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
>> -			       "(!CONFIG_HIGHMEM).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1);
>> -			continue;
>> -		}
>>
>> -		/*
>> -		 * Check whether this memory bank would partially overlap
>> -		 * the vmalloc area.
>> -		 */
>> -		if (bank->size > size_limit) {
>> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
>> -			       "to -%.8llx (vmalloc region overlap).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1,
>> -			       (unsigned long long)bank->start + size_limit - 1);
>> -			bank->size = size_limit;
>> +			if (reg->size > size_limit) {
>> +				phys_addr_t overlap_size = reg->size - size_limit;
>> +
>> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
>> +					&block_start, &block_end, &overlap_size);
>
> Pls, change it back to show new RAM limit instead of size.
> pr_notice("Truncating RAM at %pa-%pa to -%pa",
> 				&block_start, &block_end, &vmalloc_limit);
>
>
>> +				memblock_remove(vmalloc_limit, overlap_size);
>> +				block_end = vmalloc_limit;
>> +			}
>>    		}
>> -#endif
>> -		if (!bank->highmem) {
>> -			phys_addr_t bank_end = bank->start + bank->size;
>>
>> -			if (bank_end > arm_lowmem_limit)
>> -				arm_lowmem_limit = bank_end;
>> +		if (!highmem) {
>> +			if (block_end > arm_lowmem_limit)
>> +				arm_lowmem_limit = reg->base + size_limit;
>> +
>
> if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
> which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
> non existent memory address.
>
> Seems, it should be:
>    arm_lowmem_limit = block_end;
>

Yes, I believe so. I will review it.

>>
>>    			/*
>>    			 * Find the first non-section-aligned page, and point
>> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>>    			 * occurs before any free memory is mapped.
>>    			 */
>>    			if (!memblock_limit) {
>> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
>> -					memblock_limit = bank->start;
>> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
>> -					memblock_limit = bank_end;
> [...]
>
> Thanks for your patience :)
>

Thanks for the review and debugging!

> Regards,
> -grygorii
>

Thanks,
Laura

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

^ permalink raw reply	[flat|nested] 26+ messages in thread

* Re: [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-13  2:17       ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-13  2:17 UTC (permalink / raw)
  To: Grygorii Strashko, Russell King, David Brown, Daniel Walker,
	Jason Cooper, Andrew Lunn, Sebastian Hesselbarth, Eric Miao,
	Haojian Zhuang, Ben Dooks, Kukjin Kim, linux-arm-kernel
  Cc: linux-kernel, linux-arm-msm, Leif Lindholm, Catalin Marinas,
	Rob Herring, Ard Biesheuvel, Will Deacon, Nicolas Pitre,
	Santosh Shilimkar, linux-mm, Andrew Morton, Courtney Cavin,
	Marek Szyprowski, Grant Likely

On 2/12/2014 7:09 AM, Grygorii Strashko wrote:
> Hi Laura,
>
> On 02/11/2014 11:14 PM, Laura Abbott wrote:
>> memblock is now fully integrated into the kernel and is the prefered
>> method for tracking memory. Rather than reinvent the wheel with
>> meminfo, migrate to using memblock directly instead of meminfo as
>> an intermediate.
>>
>> Acked-by: Jason Cooper <jason@lakedaemon.net>
>> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
>> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
>> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
>> ---
>>    arch/arm/include/asm/mach/arch.h         |    4 +-
>>    arch/arm/include/asm/memblock.h          |    3 +-
>>    arch/arm/include/asm/setup.h             |   23 ------
>>    arch/arm/kernel/atags_parse.c            |    5 +-
>>    arch/arm/kernel/devtree.c                |    5 --
>>    arch/arm/kernel/setup.c                  |   30 ++------
>>    arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>>    arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>>    arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>>    arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>>    arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>>    arch/arm/mach-msm/board-halibut.c        |    6 --
>>    arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>>    arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>>    arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>>    arch/arm/mach-msm/board-trout.c          |    8 +--
>>    arch/arm/mach-orion5x/common.c           |    3 +-
>>    arch/arm/mach-orion5x/common.h           |    3 +-
>>    arch/arm/mach-pxa/cm-x300.c              |    3 +-
>>    arch/arm/mach-pxa/corgi.c                |   10 +--
>>    arch/arm/mach-pxa/eseries.c              |    9 +--
>>    arch/arm/mach-pxa/poodle.c               |    8 +--
>>    arch/arm/mach-pxa/spitz.c                |    8 +--
>>    arch/arm/mach-pxa/tosa.c                 |    8 +--
>>    arch/arm/mach-realview/core.c            |   11 +--
>>    arch/arm/mach-realview/core.h            |    3 +-
>>    arch/arm/mach-realview/realview_pb1176.c |    8 +--
>>    arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>>    arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>>    arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>>    arch/arm/mach-sa1100/assabet.c           |    2 +-
>>    arch/arm/mm/init.c                       |   67 +++++++-----------
>>    arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>
> The arch/arm/mm/nommu.c has to be updated too :)
>

Sure does.

> [...]
>
> I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
> and got following results:
>
> - without your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
>   - without your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
>                                                                            ^printout changed
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> Keystone mem defined as: from@0x80000000 size@0x40000000 (LPAE=OFF)
>
> As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
> some issues &side effects changes at least in printouts - see below.
>
>>    	memblock_reserve(__pa(_sdata), _end - _sdata);
>> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>>    /*
>>     * The mem_map array can get very big.  Free the unused area of the memory map.
>>     */
>> -static void __init free_unused_memmap(struct meminfo *mi)
>> +static void __init free_unused_memmap(void)
>>    {
>> -	unsigned long bank_start, prev_bank_end = 0;
>> -	unsigned int i;
>> +	unsigned long start, prev_end = 0;
>> +	struct memblock_region *reg;
>>
>>    	/*
>>    	 * This relies on each bank being in address order.
>>    	 * The banks are sorted previously in bootmem_init().
>>    	 */
>> -	for_each_bank(i, mi) {
>> -		struct membank *bank = &mi->bank[i];
>> -
>> -		bank_start = bank_pfn_start(bank);
>> +	for_each_memblock(memory, reg) {
>> +		start = __phys_to_pfn(reg->base);
>
> memblock_region_memory_base_pfn() can be used here.
>

Okay

>>
>>    #ifdef CONFIG_SPARSEMEM
>>    		/*
>>    		 * Take care not to free memmap entries that don't exist
>>    		 * due to SPARSEMEM sections which aren't present.
>>    		 */
>> -		bank_start = min(bank_start,
>> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +		start = min(start,
>> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>>    #else
>>    		/*
>>    		 * Align down here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank start aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
>> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>>    #endif
>>    		/*
>>    		 * If we had a previous bank, and there is a space
>>    		 * between the current bank and the previous, free it.
>>    		 */
>> -		if (prev_bank_end && prev_bank_end < bank_start)
>> -			free_memmap(prev_bank_end, bank_start);
>> +		if (prev_end && prev_end < start)
>> +			free_memmap(prev_end, start);
>>
>>    		/*
>>    		 * Align up here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank end aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
>> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
>
> I think, start + __phys_to_pfn(reg->size) can be replaced by
> memblock_region_memory_end_pfn().
>

Okay

>> +				 MAX_ORDER_NR_PAGES);
>>    	}
>>
>>    #ifdef CONFIG_SPARSEMEM
>> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
>> -		free_memmap(prev_bank_end,
>> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
>> +		free_memmap(prev_end,
>> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>>    #endif
>>    }
>>
>> @@ -536,7 +519,7 @@ void __init mem_init(void)
>>    	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>>
>>    	/* this will put all unused low memory onto the freelists */
>> -	free_unused_memmap(&meminfo);
>> +	free_unused_memmap();
>>    	free_all_bootmem();
>>
>>    #ifdef CONFIG_SA1111
>> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
>> index 4f08c13..23433ef 100644
>> --- a/arch/arm/mm/mmu.c
>> +++ b/arch/arm/mm/mmu.c
>> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>>    void __init sanity_check_meminfo(void)
>>    {
>>    	phys_addr_t memblock_limit = 0;
>> -	int i, j, highmem = 0;
>> +	int highmem = 0;
>>    	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
>> +	struct memblock_region *reg;
>>
>> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
>> -		struct membank *bank = &meminfo.bank[j];
>> -		phys_addr_t size_limit;
>> -
>> -		*bank = meminfo.bank[i];
>> -		size_limit = bank->size;
>> +	for_each_memblock(memory, reg) {
>> +		phys_addr_t block_start = reg->base;
>> +		phys_addr_t block_end = reg->base + reg->size;
>> +		phys_addr_t size_limit = reg->size;
>>
>> -		if (bank->start >= vmalloc_limit)
>> +		if (reg->base >= vmalloc_limit)
>>    			highmem = 1;
>>    		else
>> -			size_limit = vmalloc_limit - bank->start;
>> +			size_limit = vmalloc_limit - reg->base;
>>
>> -		bank->highmem = highmem;
>>
>> -#ifdef CONFIG_HIGHMEM
>> -		/*
>> -		 * Split those memory banks which are partially overlapping
>> -		 * the vmalloc area greatly simplifying things later.
>> -		 */
>> -		if (!highmem && bank->size > size_limit) {
>> -			if (meminfo.nr_banks >= NR_BANKS) {
>> -				printk(KERN_CRIT "NR_BANKS too low, "
>> -						 "ignoring high memory\n");
>> -			} else {
>> -				memmove(bank + 1, bank,
>> -					(meminfo.nr_banks - i) * sizeof(*bank));
>> -				meminfo.nr_banks++;
>> -				i++;
>> -				bank[1].size -= size_limit;
>> -				bank[1].start = vmalloc_limit;
>> -				bank[1].highmem = highmem = 1;
>> -				j++;
>> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
>> +
>> +			if (highmem) {
>> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
>> +					&block_start, &block_end);
>> +				memblock_remove(block_start, block_end);
>
> The wrong size is used here, should be => memblock_remove(block_start, reg->size);
> or => memblock_remove(block_start, size_limit);
>

Yes, you are correct. I'm guessing I meant to do block_end-block_start 
and missed the last part.

>> +				continue;
>>    			}
>> -			bank->size = size_limit;
>> -		}
>> -#else
>> -		/*
>> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
>> -		 */
>> -		if (highmem) {
>> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
>> -			       "(!CONFIG_HIGHMEM).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1);
>> -			continue;
>> -		}
>>
>> -		/*
>> -		 * Check whether this memory bank would partially overlap
>> -		 * the vmalloc area.
>> -		 */
>> -		if (bank->size > size_limit) {
>> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
>> -			       "to -%.8llx (vmalloc region overlap).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1,
>> -			       (unsigned long long)bank->start + size_limit - 1);
>> -			bank->size = size_limit;
>> +			if (reg->size > size_limit) {
>> +				phys_addr_t overlap_size = reg->size - size_limit;
>> +
>> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
>> +					&block_start, &block_end, &overlap_size);
>
> Pls, change it back to show new RAM limit instead of size.
> pr_notice("Truncating RAM at %pa-%pa to -%pa",
> 				&block_start, &block_end, &vmalloc_limit);
>
>
>> +				memblock_remove(vmalloc_limit, overlap_size);
>> +				block_end = vmalloc_limit;
>> +			}
>>    		}
>> -#endif
>> -		if (!bank->highmem) {
>> -			phys_addr_t bank_end = bank->start + bank->size;
>>
>> -			if (bank_end > arm_lowmem_limit)
>> -				arm_lowmem_limit = bank_end;
>> +		if (!highmem) {
>> +			if (block_end > arm_lowmem_limit)
>> +				arm_lowmem_limit = reg->base + size_limit;
>> +
>
> if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
> which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
> non existent memory address.
>
> Seems, it should be:
>    arm_lowmem_limit = block_end;
>

Yes, I believe so. I will review it.

>>
>>    			/*
>>    			 * Find the first non-section-aligned page, and point
>> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>>    			 * occurs before any free memory is mapped.
>>    			 */
>>    			if (!memblock_limit) {
>> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
>> -					memblock_limit = bank->start;
>> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
>> -					memblock_limit = bank_end;
> [...]
>
> Thanks for your patience :)
>

Thanks for the review and debugging!

> Regards,
> -grygorii
>

Thanks,
Laura

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^ permalink raw reply	[flat|nested] 26+ messages in thread

* [PATCHv3 2/2] arm: Get rid of meminfo
@ 2014-02-13  2:17       ` Laura Abbott
  0 siblings, 0 replies; 26+ messages in thread
From: Laura Abbott @ 2014-02-13  2:17 UTC (permalink / raw)
  To: linux-arm-kernel

On 2/12/2014 7:09 AM, Grygorii Strashko wrote:
> Hi Laura,
>
> On 02/11/2014 11:14 PM, Laura Abbott wrote:
>> memblock is now fully integrated into the kernel and is the prefered
>> method for tracking memory. Rather than reinvent the wheel with
>> meminfo, migrate to using memblock directly instead of meminfo as
>> an intermediate.
>>
>> Acked-by: Jason Cooper <jason@lakedaemon.net>
>> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
>> Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
>> Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
>> ---
>>    arch/arm/include/asm/mach/arch.h         |    4 +-
>>    arch/arm/include/asm/memblock.h          |    3 +-
>>    arch/arm/include/asm/setup.h             |   23 ------
>>    arch/arm/kernel/atags_parse.c            |    5 +-
>>    arch/arm/kernel/devtree.c                |    5 --
>>    arch/arm/kernel/setup.c                  |   30 ++------
>>    arch/arm/mach-clps711x/board-clep7312.c  |    7 +-
>>    arch/arm/mach-clps711x/board-edb7211.c   |   10 +--
>>    arch/arm/mach-clps711x/board-p720t.c     |    2 +-
>>    arch/arm/mach-footbridge/cats-hw.c       |    2 +-
>>    arch/arm/mach-footbridge/netwinder-hw.c  |    2 +-
>>    arch/arm/mach-msm/board-halibut.c        |    6 --
>>    arch/arm/mach-msm/board-mahimahi.c       |   13 +---
>>    arch/arm/mach-msm/board-msm7x30.c        |    3 +-
>>    arch/arm/mach-msm/board-sapphire.c       |   13 ++--
>>    arch/arm/mach-msm/board-trout.c          |    8 +--
>>    arch/arm/mach-orion5x/common.c           |    3 +-
>>    arch/arm/mach-orion5x/common.h           |    3 +-
>>    arch/arm/mach-pxa/cm-x300.c              |    3 +-
>>    arch/arm/mach-pxa/corgi.c                |   10 +--
>>    arch/arm/mach-pxa/eseries.c              |    9 +--
>>    arch/arm/mach-pxa/poodle.c               |    8 +--
>>    arch/arm/mach-pxa/spitz.c                |    8 +--
>>    arch/arm/mach-pxa/tosa.c                 |    8 +--
>>    arch/arm/mach-realview/core.c            |   11 +--
>>    arch/arm/mach-realview/core.h            |    3 +-
>>    arch/arm/mach-realview/realview_pb1176.c |    8 +--
>>    arch/arm/mach-realview/realview_pbx.c    |   17 ++---
>>    arch/arm/mach-s3c24xx/mach-smdk2413.c    |    8 +--
>>    arch/arm/mach-s3c24xx/mach-vstms.c       |    8 +--
>>    arch/arm/mach-sa1100/assabet.c           |    2 +-
>>    arch/arm/mm/init.c                       |   67 +++++++-----------
>>    arch/arm/mm/mmu.c                        |  115 +++++++++---------------------
>
> The arch/arm/mm/nommu.c has to be updated too :)
>

Sure does.

> [...]
>
> I've tested your change on keystone (with some additional printouts in sanity_check_meminfo())
> and got following results:
>
> - without your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
>   - without your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 80000000-bfffffff to -af7fffff (vmalloc region overlap).
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=ON
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> - with your change + HIGHMEM=OFF
> [    0.000000] Truncating RAM at 0x0000000080000000-0x00000000c0000000 to -0x0000000010800000
>                                                                            ^printout changed
> [    0.000000] ==== memblock_limit0x00000000af800000, arm_lowmem_limit0x00000000af800000 high_memoryef800000 vmalloc_limit0x00000000af800000
>
> Keystone mem defined as: from at 0x80000000 size at 0x40000000 (LPAE=OFF)
>
> As result, i have few comments regarding sanity_check_meminfo() changes as I think there are
> some issues &side effects changes at least in printouts - see below.
>
>>    	memblock_reserve(__pa(_sdata), _end - _sdata);
>> @@ -413,54 +397,53 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
>>    /*
>>     * The mem_map array can get very big.  Free the unused area of the memory map.
>>     */
>> -static void __init free_unused_memmap(struct meminfo *mi)
>> +static void __init free_unused_memmap(void)
>>    {
>> -	unsigned long bank_start, prev_bank_end = 0;
>> -	unsigned int i;
>> +	unsigned long start, prev_end = 0;
>> +	struct memblock_region *reg;
>>
>>    	/*
>>    	 * This relies on each bank being in address order.
>>    	 * The banks are sorted previously in bootmem_init().
>>    	 */
>> -	for_each_bank(i, mi) {
>> -		struct membank *bank = &mi->bank[i];
>> -
>> -		bank_start = bank_pfn_start(bank);
>> +	for_each_memblock(memory, reg) {
>> +		start = __phys_to_pfn(reg->base);
>
> memblock_region_memory_base_pfn() can be used here.
>

Okay

>>
>>    #ifdef CONFIG_SPARSEMEM
>>    		/*
>>    		 * Take care not to free memmap entries that don't exist
>>    		 * due to SPARSEMEM sections which aren't present.
>>    		 */
>> -		bank_start = min(bank_start,
>> -				 ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +		start = min(start,
>> +				 ALIGN(prev_end, PAGES_PER_SECTION));
>>    #else
>>    		/*
>>    		 * Align down here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank start aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
>> +		start = round_down(start, MAX_ORDER_NR_PAGES);
>>    #endif
>>    		/*
>>    		 * If we had a previous bank, and there is a space
>>    		 * between the current bank and the previous, free it.
>>    		 */
>> -		if (prev_bank_end && prev_bank_end < bank_start)
>> -			free_memmap(prev_bank_end, bank_start);
>> +		if (prev_end && prev_end < start)
>> +			free_memmap(prev_end, start);
>>
>>    		/*
>>    		 * Align up here since the VM subsystem insists that the
>>    		 * memmap entries are valid from the bank end aligned to
>>    		 * MAX_ORDER_NR_PAGES.
>>    		 */
>> -		prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
>> +		prev_end = ALIGN(start + __phys_to_pfn(reg->size),
>
> I think, start + __phys_to_pfn(reg->size) can be replaced by
> memblock_region_memory_end_pfn().
>

Okay

>> +				 MAX_ORDER_NR_PAGES);
>>    	}
>>
>>    #ifdef CONFIG_SPARSEMEM
>> -	if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
>> -		free_memmap(prev_bank_end,
>> -			    ALIGN(prev_bank_end, PAGES_PER_SECTION));
>> +	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
>> +		free_memmap(prev_end,
>> +			    ALIGN(prev_end, PAGES_PER_SECTION));
>>    #endif
>>    }
>>
>> @@ -536,7 +519,7 @@ void __init mem_init(void)
>>    	set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
>>
>>    	/* this will put all unused low memory onto the freelists */
>> -	free_unused_memmap(&meminfo);
>> +	free_unused_memmap();
>>    	free_all_bootmem();
>>
>>    #ifdef CONFIG_SA1111
>> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
>> index 4f08c13..23433ef 100644
>> --- a/arch/arm/mm/mmu.c
>> +++ b/arch/arm/mm/mmu.c
>> @@ -1046,74 +1046,44 @@ phys_addr_t arm_lowmem_limit __initdata = 0;
>>    void __init sanity_check_meminfo(void)
>>    {
>>    	phys_addr_t memblock_limit = 0;
>> -	int i, j, highmem = 0;
>> +	int highmem = 0;
>>    	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;
>> +	struct memblock_region *reg;
>>
>> -	for (i = 0, j = 0; i < meminfo.nr_banks; i++) {
>> -		struct membank *bank = &meminfo.bank[j];
>> -		phys_addr_t size_limit;
>> -
>> -		*bank = meminfo.bank[i];
>> -		size_limit = bank->size;
>> +	for_each_memblock(memory, reg) {
>> +		phys_addr_t block_start = reg->base;
>> +		phys_addr_t block_end = reg->base + reg->size;
>> +		phys_addr_t size_limit = reg->size;
>>
>> -		if (bank->start >= vmalloc_limit)
>> +		if (reg->base >= vmalloc_limit)
>>    			highmem = 1;
>>    		else
>> -			size_limit = vmalloc_limit - bank->start;
>> +			size_limit = vmalloc_limit - reg->base;
>>
>> -		bank->highmem = highmem;
>>
>> -#ifdef CONFIG_HIGHMEM
>> -		/*
>> -		 * Split those memory banks which are partially overlapping
>> -		 * the vmalloc area greatly simplifying things later.
>> -		 */
>> -		if (!highmem && bank->size > size_limit) {
>> -			if (meminfo.nr_banks >= NR_BANKS) {
>> -				printk(KERN_CRIT "NR_BANKS too low, "
>> -						 "ignoring high memory\n");
>> -			} else {
>> -				memmove(bank + 1, bank,
>> -					(meminfo.nr_banks - i) * sizeof(*bank));
>> -				meminfo.nr_banks++;
>> -				i++;
>> -				bank[1].size -= size_limit;
>> -				bank[1].start = vmalloc_limit;
>> -				bank[1].highmem = highmem = 1;
>> -				j++;
>> +		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
>> +
>> +			if (highmem) {
>> +				pr_notice("Ignoring ram at %pa-%pa (!CONFIG_HIGHMEM)\n",
>> +					&block_start, &block_end);
>> +				memblock_remove(block_start, block_end);
>
> The wrong size is used here, should be => memblock_remove(block_start, reg->size);
> or => memblock_remove(block_start, size_limit);
>

Yes, you are correct. I'm guessing I meant to do block_end-block_start 
and missed the last part.

>> +				continue;
>>    			}
>> -			bank->size = size_limit;
>> -		}
>> -#else
>> -		/*
>> -		 * Highmem banks not allowed with !CONFIG_HIGHMEM.
>> -		 */
>> -		if (highmem) {
>> -			printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
>> -			       "(!CONFIG_HIGHMEM).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1);
>> -			continue;
>> -		}
>>
>> -		/*
>> -		 * Check whether this memory bank would partially overlap
>> -		 * the vmalloc area.
>> -		 */
>> -		if (bank->size > size_limit) {
>> -			printk(KERN_NOTICE "Truncating RAM at %.8llx-%.8llx "
>> -			       "to -%.8llx (vmalloc region overlap).\n",
>> -			       (unsigned long long)bank->start,
>> -			       (unsigned long long)bank->start + bank->size - 1,
>> -			       (unsigned long long)bank->start + size_limit - 1);
>> -			bank->size = size_limit;
>> +			if (reg->size > size_limit) {
>> +				phys_addr_t overlap_size = reg->size - size_limit;
>> +
>> +				pr_notice("Truncating RAM at %pa-%pa to -%pa",
>> +					&block_start, &block_end, &overlap_size);
>
> Pls, change it back to show new RAM limit instead of size.
> pr_notice("Truncating RAM at %pa-%pa to -%pa",
> 				&block_start, &block_end, &vmalloc_limit);
>
>
>> +				memblock_remove(vmalloc_limit, overlap_size);
>> +				block_end = vmalloc_limit;
>> +			}
>>    		}
>> -#endif
>> -		if (!bank->highmem) {
>> -			phys_addr_t bank_end = bank->start + bank->size;
>>
>> -			if (bank_end > arm_lowmem_limit)
>> -				arm_lowmem_limit = bank_end;
>> +		if (!highmem) {
>> +			if (block_end > arm_lowmem_limit)
>> +				arm_lowmem_limit = reg->base + size_limit;
>> +
>
> if !highmem then size_limit will be calculated as vmalloc_limit - reg->base
> which in turn can be greater than reg->size. So, arm_lowmem_limit can point on
> non existent memory address.
>
> Seems, it should be:
>    arm_lowmem_limit = block_end;
>

Yes, I believe so. I will review it.

>>
>>    			/*
>>    			 * Find the first non-section-aligned page, and point
>> @@ -1129,35 +1099,16 @@ void __init sanity_check_meminfo(void)
>>    			 * occurs before any free memory is mapped.
>>    			 */
>>    			if (!memblock_limit) {
>> -				if (!IS_ALIGNED(bank->start, SECTION_SIZE))
>> -					memblock_limit = bank->start;
>> -				else if (!IS_ALIGNED(bank_end, SECTION_SIZE))
>> -					memblock_limit = bank_end;
> [...]
>
> Thanks for your patience :)
>

Thanks for the review and debugging!

> Regards,
> -grygorii
>

Thanks,
Laura

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

^ permalink raw reply	[flat|nested] 26+ messages in thread

end of thread, other threads:[~2014-02-13  2:17 UTC | newest]

Thread overview: 26+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-02-11 21:14 [PATCHv3 0/2] Remove ARM meminfo Laura Abbott
2014-02-11 21:14 ` Laura Abbott
2014-02-11 21:14 ` Laura Abbott
2014-02-11 21:14 ` [PATCHv3 1/2] mm/memblock: add memblock_get_current_limit Laura Abbott
2014-02-11 21:14   ` Laura Abbott
2014-02-11 21:21   ` Andrew Morton
2014-02-11 21:21     ` Andrew Morton
2014-02-11 21:14 ` [PATCHv3 2/2] arm: Get rid of meminfo Laura Abbott
2014-02-11 21:14   ` Laura Abbott
2014-02-11 21:14   ` Laura Abbott
2014-02-11  3:33   ` Kukjin Kim
2014-02-11  3:33     ` Kukjin Kim
2014-02-11  3:33     ` Kukjin Kim
2014-02-11  3:33     ` Kukjin Kim
2014-02-12  5:09   ` Kukjin Kim
2014-02-12  5:09     ` Kukjin Kim
2014-02-12  5:09     ` Kukjin Kim
2014-02-12  8:27   ` Marek Szyprowski
2014-02-12  8:27     ` Marek Szyprowski
2014-02-12  8:27     ` Marek Szyprowski
2014-02-12 15:09   ` Grygorii Strashko
2014-02-12 15:09     ` Grygorii Strashko
2014-02-12 15:09     ` Grygorii Strashko
2014-02-13  2:17     ` Laura Abbott
2014-02-13  2:17       ` Laura Abbott
2014-02-13  2:17       ` Laura Abbott

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