[PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[Matt Redfearn]

From: Palmer Dabbelt <palmer@sifive.com>

As part of the MIPS conversion to use the generic GCC library routines,
Matt Redfearn discovered that I'd missed a notrace on __ucmpdi2().  This
patch rectifies the problem.

CC: Matt Redfearn <matt.redfearn@mips.com>
CC: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Reviewed-by: Matt Redfearn <matt.redfearn@mips.com>
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2:
  add notrace to lib/ucmpdi2.c

 lib/ucmpdi2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ucmpdi2.c b/lib/ucmpdi2.c
index 25ca2d4c1e19..597998169a96 100644
--- a/lib/ucmpdi2.c
+++ b/lib/ucmpdi2.c
@@ -17,7 +17,7 @@
 #include <linux/module.h>
 #include <linux/libgcc.h>
 
-word_type __ucmpdi2(unsigned long long a, unsigned long long b)
+word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
 {
 	const DWunion au = {.ll = a};
 	const DWunion bu = {.ll = b};
-- 
2.7.4

[PATCH v4 2/3] lib: Rename compiler intrinsic selects to GENERIC_LIB_*

[Matt Redfearn]

When these are included into arch Kconfig files, maintaining
alphabetical ordering of the selects means these get split up. To allow
for keeping things tidier and alphabetical, rename the selects to
GENERIC_LIB_*

Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>

---

Changes in v4:
Rename Kconfig symbols GENERIC_* -> GENERIC_LIB_*

Changes in v3: None
Changes in v2: None

 arch/riscv/Kconfig |  6 +++---
 lib/Kconfig        | 12 ++++++------
 lib/Makefile       | 12 ++++++------
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 04807c7f64cc..20185aaaf933 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -104,9 +104,9 @@ config ARCH_RV32I
 	bool "RV32I"
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select 32BIT
-	select GENERIC_ASHLDI3
-	select GENERIC_ASHRDI3
-	select GENERIC_LSHRDI3
+	select GENERIC_LIB_ASHLDI3
+	select GENERIC_LIB_ASHRDI3
+	select GENERIC_LIB_LSHRDI3
 
 config ARCH_RV64I
 	bool "RV64I"
diff --git a/lib/Kconfig b/lib/Kconfig
index e96089499371..e54ebe00937e 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -588,20 +588,20 @@ config STRING_SELFTEST
 
 endmenu
 
-config GENERIC_ASHLDI3
+config GENERIC_LIB_ASHLDI3
 	bool
 
-config GENERIC_ASHRDI3
+config GENERIC_LIB_ASHRDI3
 	bool
 
-config GENERIC_LSHRDI3
+config GENERIC_LIB_LSHRDI3
 	bool
 
-config GENERIC_MULDI3
+config GENERIC_LIB_MULDI3
 	bool
 
-config GENERIC_CMPDI2
+config GENERIC_LIB_CMPDI2
 	bool
 
-config GENERIC_UCMPDI2
+config GENERIC_LIB_UCMPDI2
 	bool
diff --git a/lib/Makefile b/lib/Makefile
index a90d4fcd748f..7425e177f08c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -253,9 +253,9 @@ obj-$(CONFIG_SBITMAP) += sbitmap.o
 obj-$(CONFIG_PARMAN) += parman.o
 
 # GCC library routines
-obj-$(CONFIG_GENERIC_ASHLDI3) += ashldi3.o
-obj-$(CONFIG_GENERIC_ASHRDI3) += ashrdi3.o
-obj-$(CONFIG_GENERIC_LSHRDI3) += lshrdi3.o
-obj-$(CONFIG_GENERIC_MULDI3) += muldi3.o
-obj-$(CONFIG_GENERIC_CMPDI2) += cmpdi2.o
-obj-$(CONFIG_GENERIC_UCMPDI2) += ucmpdi2.o
+obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o
+obj-$(CONFIG_GENERIC_LIB_ASHRDI3) += ashrdi3.o
+obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
+obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
+obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
+obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
-- 
2.7.4

[PATCH v4 3/3] MIPS: use generic GCC library routines from lib/

[Matt Redfearn]

From: Antony Pavlov <antonynpavlov@gmail.com>

The commit b35cd9884fa5 ("lib: Add shared copies of some GCC library
routines") makes it possible to share generic GCC library routines by
several architectures.

This commit removes several generic GCC library routines from
arch/mips/lib/ in favour of similar routines from lib/.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
[Matt Redfearn] Use GENERIC_LIB_* named Kconfig entries
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Matt Redfearn <matt.redfearn@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org

---

Changes in v4:
  Rework to use the new GENERIC_LIB_ Kconfig entries

Changes in v3:
  Maintain alphabetical order of MIPS Kconfig

Changes in v2: None

 arch/mips/Kconfig      | 5 +++++
 arch/mips/lib/Makefile | 3 +--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 8128c3b68d6b..98955a76c656 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -22,6 +22,11 @@ config MIPS
 	select GENERIC_CPU_AUTOPROBE
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
+	select GENERIC_LIB_ASHLDI3
+	select GENERIC_LIB_ASHRDI3
+	select GENERIC_LIB_CMPDI2
+	select GENERIC_LIB_LSHRDI3
+	select GENERIC_LIB_UCMPDI2
 	select GENERIC_PCI_IOMAP
 	select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
 	select GENERIC_SMP_IDLE_THREAD
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index e84e12655fa8..6537e022ef62 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -16,5 +16,4 @@ obj-$(CONFIG_CPU_R3000)		+= r3k_dump_tlb.o
 obj-$(CONFIG_CPU_TX39XX)	+= r3k_dump_tlb.o
 
 # libgcc-style stuff needed in the kernel
-obj-y += ashldi3.o ashrdi3.o bswapsi.o bswapdi.o cmpdi2.o lshrdi3.o multi3.o \
-	 ucmpdi2.o
+obj-y += bswapsi.o bswapdi.o multi3.o
-- 
2.7.4

Re: [PATCH v4 3/3] MIPS: use generic GCC library routines from lib/

[James Hogan]

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On Thu, Mar 29, 2018 at 11:41:23AM +0100, Matt Redfearn wrote:
> This commit removes several generic GCC library routines from
> arch/mips/lib/ in favour of similar routines from lib/.

> diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
> index e84e12655fa8..6537e022ef62 100644
> --- a/arch/mips/lib/Makefile
> +++ b/arch/mips/lib/Makefile
> @@ -16,5 +16,4 @@ obj-$(CONFIG_CPU_R3000)		+= r3k_dump_tlb.o
>  obj-$(CONFIG_CPU_TX39XX)	+= r3k_dump_tlb.o
>  
>  # libgcc-style stuff needed in the kernel
> -obj-y += ashldi3.o ashrdi3.o bswapsi.o bswapdi.o cmpdi2.o lshrdi3.o multi3.o \
> -	 ucmpdi2.o
> +obj-y += bswapsi.o bswapdi.o multi3.o

Have you missed deleting the files?

Cheers
James

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Re: [PATCH v4 3/3] MIPS: use generic GCC library routines from lib/

[Matt Redfearn]

On 03/04/18 09:53, James Hogan wrote:
> On Thu, Mar 29, 2018 at 11:41:23AM +0100, Matt Redfearn wrote:
>> This commit removes several generic GCC library routines from
>> arch/mips/lib/ in favour of similar routines from lib/.
> 
>> diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
>> index e84e12655fa8..6537e022ef62 100644
>> --- a/arch/mips/lib/Makefile
>> +++ b/arch/mips/lib/Makefile
>> @@ -16,5 +16,4 @@ obj-$(CONFIG_CPU_R3000)		+= r3k_dump_tlb.o
>>   obj-$(CONFIG_CPU_TX39XX)	+= r3k_dump_tlb.o
>>   
>>   # libgcc-style stuff needed in the kernel
>> -obj-y += ashldi3.o ashrdi3.o bswapsi.o bswapdi.o cmpdi2.o lshrdi3.o multi3.o \
>> -	 ucmpdi2.o
>> +obj-y += bswapsi.o bswapdi.o multi3.o
> 
> Have you missed deleting the files?

Oops, got lost during the rebase :-/

Thanks,
Matt

> 
> Cheers
> James
> 

Re: [PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[Palmer Dabbelt]

On Thu, 29 Mar 2018 03:41:21 PDT (-0700), matt.redfearn@mips.com wrote:
> From: Palmer Dabbelt <palmer@sifive.com>
>
> As part of the MIPS conversion to use the generic GCC library routines,
> Matt Redfearn discovered that I'd missed a notrace on __ucmpdi2().  This
> patch rectifies the problem.
>
> CC: Matt Redfearn <matt.redfearn@mips.com>
> CC: Antony Pavlov <antonynpavlov@gmail.com>
> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
> Reviewed-by: Matt Redfearn <matt.redfearn@mips.com>
> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
> ---
>
> Changes in v4: None
> Changes in v3: None
> Changes in v2:
>   add notrace to lib/ucmpdi2.c
>
>  lib/ucmpdi2.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/ucmpdi2.c b/lib/ucmpdi2.c
> index 25ca2d4c1e19..597998169a96 100644
> --- a/lib/ucmpdi2.c
> +++ b/lib/ucmpdi2.c
> @@ -17,7 +17,7 @@
>  #include <linux/module.h>
>  #include <linux/libgcc.h>
>
> -word_type __ucmpdi2(unsigned long long a, unsigned long long b)
> +word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
>  {
>  	const DWunion au = {.ll = a};
>  	const DWunion bu = {.ll = b};

Ah, thanks, I think I must have forgotten about this.  I assume these three are 
going through your tree?

Re: [PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[Matt Redfearn]

Hi Palmer,

On 29/03/18 22:59, Palmer Dabbelt wrote:
> On Thu, 29 Mar 2018 03:41:21 PDT (-0700), matt.redfearn@mips.com wrote:
>> From: Palmer Dabbelt <palmer@sifive.com>
>>
>> As part of the MIPS conversion to use the generic GCC library routines,
>> Matt Redfearn discovered that I'd missed a notrace on __ucmpdi2().  This
>> patch rectifies the problem.
>>
>> CC: Matt Redfearn <matt.redfearn@mips.com>
>> CC: Antony Pavlov <antonynpavlov@gmail.com>
>> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
>> Reviewed-by: Matt Redfearn <matt.redfearn@mips.com>
>> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
>> ---
>>
>> Changes in v4: None
>> Changes in v3: None
>> Changes in v2:
>>   add notrace to lib/ucmpdi2.c
>>
>>  lib/ucmpdi2.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/lib/ucmpdi2.c b/lib/ucmpdi2.c
>> index 25ca2d4c1e19..597998169a96 100644
>> --- a/lib/ucmpdi2.c
>> +++ b/lib/ucmpdi2.c
>> @@ -17,7 +17,7 @@
>>  #include <linux/module.h>
>>  #include <linux/libgcc.h>
>>
>> -word_type __ucmpdi2(unsigned long long a, unsigned long long b)
>> +word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
>>  {
>>      const DWunion au = {.ll = a};
>>      const DWunion bu = {.ll = b};
> 
> Ah, thanks, I think I must have forgotten about this.  I assume these 
> three are going through your tree?

Yeah I think that's the plan - James will need your ack to patch 2 if 
that's ok.

Thanks,
Matt

Re: [PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[James Hogan]

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On Tue, Apr 03, 2018 at 02:51:06PM +0100, Matt Redfearn wrote:
> On 29/03/18 22:59, Palmer Dabbelt wrote:
> > Ah, thanks, I think I must have forgotten about this.  I assume these 
> > three are going through your tree?
> 
> Yeah I think that's the plan - James will need your ack to patch 2 if 
> that's ok.

Yeh, I've applied v5 for 4.17 with Palmer's reviewed-by, but I'll change
to an ack if thats okay with Palmer.

Cheers
James

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Re: [PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[Palmer Dabbelt]

On Tue, 03 Apr 2018 07:45:45 PDT (-0700), jhogan@kernel.org wrote:
> On Tue, Apr 03, 2018 at 02:51:06PM +0100, Matt Redfearn wrote:
>> On 29/03/18 22:59, Palmer Dabbelt wrote:
>> > Ah, thanks, I think I must have forgotten about this.  I assume these 
>> > three are going through your tree?
>> 
>> Yeah I think that's the plan - James will need your ack to patch 2 if 
>> that's ok.
>
> Yeh, I've applied v5 for 4.17 with Palmer's reviewed-by, but I'll change
> to an ack if thats okay with Palmer.
>

Either way is OK for me.

Re: [PATCH v4 1/3] Add notrace to lib/ucmpdi2.c

[Palmer Dabbelt]

On Tue, 03 Apr 2018 06:51:06 PDT (-0700), matt.redfearn@mips.com wrote:
> Hi Palmer,
>
> On 29/03/18 22:59, Palmer Dabbelt wrote:
>> On Thu, 29 Mar 2018 03:41:21 PDT (-0700), matt.redfearn@mips.com wrote:
>>> From: Palmer Dabbelt <palmer@sifive.com>
>>>
>>> As part of the MIPS conversion to use the generic GCC library routines,
>>> Matt Redfearn discovered that I'd missed a notrace on __ucmpdi2().  This
>>> patch rectifies the problem.
>>>
>>> CC: Matt Redfearn <matt.redfearn@mips.com>
>>> CC: Antony Pavlov <antonynpavlov@gmail.com>
>>> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
>>> Reviewed-by: Matt Redfearn <matt.redfearn@mips.com>
>>> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
>>> ---
>>>
>>> Changes in v4: None
>>> Changes in v3: None
>>> Changes in v2:
>>>   add notrace to lib/ucmpdi2.c
>>>
>>>  lib/ucmpdi2.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/lib/ucmpdi2.c b/lib/ucmpdi2.c
>>> index 25ca2d4c1e19..597998169a96 100644
>>> --- a/lib/ucmpdi2.c
>>> +++ b/lib/ucmpdi2.c
>>> @@ -17,7 +17,7 @@
>>>  #include <linux/module.h>
>>>  #include <linux/libgcc.h>
>>>
>>> -word_type __ucmpdi2(unsigned long long a, unsigned long long b)
>>> +word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
>>>  {
>>>      const DWunion au = {.ll = a};
>>>      const DWunion bu = {.ll = b};
>> 
>> Ah, thanks, I think I must have forgotten about this.  I assume these 
>> three are going through your tree?
>
> Yeah I think that's the plan - James will need your ack to patch 2 if 
> that's ok.

OK, I think I acked the right one... :)