[PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Geert Uytterhoeven]

	Hi all,

If NO_DMA=y, get_dma_ops() returns a reference to the non-existing
symbol bad_dma_ops, thus causing a link failure if it is ever used.

The intention of this is twofold:
  1. To catch users of the DMA API on systems that do no support the DMA
     mapping API,
  2. To avoid building drivers that cannot work on such systems anyway.

However, the disadvantage is that we have to keep on adding dependencies
on HAS_DMA all over the place.

Thanks to the COMPILE_TEST symbol, lots of drivers now depend on one or
more platform dependencies (that imply HAS_DMA) || COMPILE_TEST, thus
already covering intention #2.  Having to add an explicit dependency on
HAS_DMA here is cumbersome, and hinders compile-testing.

Hence I think the time is ripe to reconsider the link failure.
Patch series "[PATCH v2 0/5] Allow compile-testing NO_DMA (core)"
(https://lkml.org/lkml/2018/3/16/435) already:
  - Changed get_dma_ops() to return NULL instead,
  - Added a few more dummies to enable compile-testing.

This patch series:
  - Removes dependencies on HAS_DMA for symbols that already have
    platform dependencies implying HAS_DMA.

To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
this (drivers) series should be applied after the previous (core)
series (but not many people may notice/care ;-)

Changes compared to v1:
  - Add Reviewed-by, Acked-by,
  - Drop dependency of SND_SOC_LPASS_IPQ806X on HAS_DMA,
  - Drop dependency of VIDEOBUF{,2}_DMA_{CONTIG,SG} on HAS_DMA,
  - Drop new dependencies of VIDEO_IPU3_CIO2, DVB_C8SECTPFE, and
    MTD_NAND_MARVELL on HAS_DMA,
  - Split in per-subsystem patches,
  - Split-off the core part in a separate series.

This series is against v4.16-rc5. It can also be found at
https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git/log/?h=no-dma-compile-testing-v2

It has been compile-tested with allmodconfig and allyesconfig for
m68k/sun3, and has received attention from the kbuild test robot.

Thanks!

Geert Uytterhoeven (21):
  ASoC: Remove depends on HAS_DMA in case of platform dependency
  ata: Remove depends on HAS_DMA in case of platform dependency
  crypto: Remove depends on HAS_DMA in case of platform dependency
  fbdev: Remove depends on HAS_DMA in case of platform dependency
  firewire: Remove depends on HAS_DMA in case of platform dependency
  fpga: Remove depends on HAS_DMA in case of platform dependency
  i2c: Remove depends on HAS_DMA in case of platform dependency
  iio: adc: Remove depends on HAS_DMA in case of platform dependency
  iommu: Remove depends on HAS_DMA in case of platform dependency
  lightnvm: Remove depends on HAS_DMA in case of platform dependency
  mailbox: Remove depends on HAS_DMA in case of platform dependency
  media: Remove depends on HAS_DMA in case of platform dependency
  mmc: Remove depends on HAS_DMA in case of platform dependency
  mtd: Remove depends on HAS_DMA in case of platform dependency
  net: Remove depends on HAS_DMA in case of platform dependency
  remoteproc: Remove depends on HAS_DMA in case of platform dependency
  scsi: hisi_sas: Remove depends on HAS_DMA in case of platform
    dependency
  serial: Remove depends on HAS_DMA in case of platform dependency
  spi: Remove depends on HAS_DMA in case of platform dependency
  staging: vc04_services: Remove depends on HAS_DMA in case of platform
    dependency
  usb: Remove depends on HAS_DMA in case of platform dependency

 drivers/ata/Kconfig                             |  2 --
 drivers/crypto/Kconfig                          | 14 +++------
 drivers/firewire/Kconfig                        |  1 -
 drivers/fpga/Kconfig                            |  1 -
 drivers/i2c/busses/Kconfig                      |  3 --
 drivers/iio/adc/Kconfig                         |  2 --
 drivers/iommu/Kconfig                           |  5 ++--
 drivers/lightnvm/Kconfig                        |  2 +-
 drivers/mailbox/Kconfig                         |  2 --
 drivers/media/common/videobuf2/Kconfig          |  2 --
 drivers/media/pci/dt3155/Kconfig                |  1 -
 drivers/media/pci/intel/ipu3/Kconfig            |  1 -
 drivers/media/pci/solo6x10/Kconfig              |  1 -
 drivers/media/pci/sta2x11/Kconfig               |  1 -
 drivers/media/pci/tw5864/Kconfig                |  1 -
 drivers/media/pci/tw686x/Kconfig                |  1 -
 drivers/media/platform/Kconfig                  | 40 ++++++++-----------------
 drivers/media/platform/am437x/Kconfig           |  2 +-
 drivers/media/platform/atmel/Kconfig            |  4 +--
 drivers/media/platform/blackfin/Kconfig         |  1 -
 drivers/media/platform/davinci/Kconfig          |  6 ----
 drivers/media/platform/marvell-ccic/Kconfig     |  3 +-
 drivers/media/platform/rcar-vin/Kconfig         |  2 +-
 drivers/media/platform/soc_camera/Kconfig       |  3 +-
 drivers/media/platform/sti/c8sectpfe/Kconfig    |  2 +-
 drivers/media/v4l2-core/Kconfig                 |  2 --
 drivers/mmc/host/Kconfig                        | 10 ++-----
 drivers/mtd/nand/Kconfig                        |  8 ++---
 drivers/mtd/spi-nor/Kconfig                     |  2 +-
 drivers/net/ethernet/amd/Kconfig                |  2 +-
 drivers/net/ethernet/apm/xgene-v2/Kconfig       |  1 -
 drivers/net/ethernet/apm/xgene/Kconfig          |  1 -
 drivers/net/ethernet/arc/Kconfig                |  6 ++--
 drivers/net/ethernet/broadcom/Kconfig           |  2 --
 drivers/net/ethernet/calxeda/Kconfig            |  2 +-
 drivers/net/ethernet/hisilicon/Kconfig          |  2 +-
 drivers/net/ethernet/marvell/Kconfig            |  8 ++---
 drivers/net/ethernet/mellanox/mlxsw/Kconfig     |  2 +-
 drivers/net/ethernet/renesas/Kconfig            |  2 --
 drivers/net/wireless/broadcom/brcm80211/Kconfig |  1 -
 drivers/net/wireless/quantenna/qtnfmac/Kconfig  |  2 +-
 drivers/remoteproc/Kconfig                      |  1 -
 drivers/scsi/hisi_sas/Kconfig                   |  2 +-
 drivers/spi/Kconfig                             | 12 ++------
 drivers/staging/media/davinci_vpfe/Kconfig      |  1 -
 drivers/staging/media/omap4iss/Kconfig          |  1 -
 drivers/staging/vc04_services/Kconfig           |  1 -
 drivers/tty/serial/Kconfig                      |  4 ---
 drivers/usb/gadget/udc/Kconfig                  |  4 +--
 drivers/usb/mtu3/Kconfig                        |  2 +-
 drivers/video/fbdev/Kconfig                     |  3 +-
 sound/soc/bcm/Kconfig                           |  3 +-
 sound/soc/kirkwood/Kconfig                      |  1 -
 sound/soc/pxa/Kconfig                           |  1 -
 sound/soc/qcom/Kconfig                          |  7 ++---
 55 files changed, 56 insertions(+), 143 deletions(-)

-- 
2.7.4

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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[PATCH v2 01/21] ASoC: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Note:
  - The various SND_SOC_LPASS_* symbols had to loose their dependencies
    on HAS_DMA, as they are selected by SND_SOC_STORM and/or
    SND_SOC_APQ8016_SBC.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Drop dependency of SND_SOC_LPASS_IPQ806X on HAS_DMA,
  - Split per subsystem.
---
 sound/soc/bcm/Kconfig      | 3 +--
 sound/soc/kirkwood/Kconfig | 1 -
 sound/soc/pxa/Kconfig      | 1 -
 sound/soc/qcom/Kconfig     | 7 ++-----
 4 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
index edf367100ebd2f17..02f50b7a966ff262 100644
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -11,9 +11,8 @@ config SND_BCM2835_SOC_I2S
 config SND_SOC_CYGNUS
 	tristate "SoC platform audio for Broadcom Cygnus chips"
 	depends on ARCH_BCM_CYGNUS || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Say Y if you want to add support for ASoC audio on Broadcom
 	  Cygnus chips (bcm958300, bcm958305, bcm911360)
 
-	  If you don't know what to do here, say N.
\ No newline at end of file
+	  If you don't know what to do here, say N.
diff --git a/sound/soc/kirkwood/Kconfig b/sound/soc/kirkwood/Kconfig
index bc3c7b5ac752e471..132bb83f8e99aff3 100644
--- a/sound/soc/kirkwood/Kconfig
+++ b/sound/soc/kirkwood/Kconfig
@@ -1,7 +1,6 @@
 config SND_KIRKWOOD_SOC
 	tristate "SoC Audio for the Marvell Kirkwood and Dove chips"
 	depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Say Y or M if you want to add support for codecs attached to
 	  the Kirkwood I2S interface. You will also need to select the
diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig
index 484ab3c2ad672fc8..960744e46edc0549 100644
--- a/sound/soc/pxa/Kconfig
+++ b/sound/soc/pxa/Kconfig
@@ -1,7 +1,6 @@
 config SND_PXA2XX_SOC
 	tristate "SoC Audio for the Intel PXA2xx chip"
 	depends on ARCH_PXA || COMPILE_TEST
-	depends on HAS_DMA
 	select SND_PXA2XX_LIB
 	help
 	  Say Y or M if you want to add support for codecs attached to
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 8ec9a074b38bd702..3cc252e55468eaab 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -11,24 +11,21 @@ config SND_SOC_LPASS_CPU
 
 config SND_SOC_LPASS_PLATFORM
 	tristate
-	depends on HAS_DMA
 	select REGMAP_MMIO
 
 config SND_SOC_LPASS_IPQ806X
 	tristate
-	depends on HAS_DMA
 	select SND_SOC_LPASS_CPU
 	select SND_SOC_LPASS_PLATFORM
 
 config SND_SOC_LPASS_APQ8016
 	tristate
-	depends on HAS_DMA
 	select SND_SOC_LPASS_CPU
 	select SND_SOC_LPASS_PLATFORM
 
 config SND_SOC_STORM
 	tristate "ASoC I2S support for Storm boards"
-	depends on SND_SOC_QCOM && HAS_DMA
+	depends on SND_SOC_QCOM
 	select SND_SOC_LPASS_IPQ806X
 	select SND_SOC_MAX98357A
 	help
@@ -37,7 +34,7 @@ config SND_SOC_STORM
 
 config SND_SOC_APQ8016_SBC
 	tristate "SoC Audio support for APQ8016 SBC platforms"
-	depends on SND_SOC_QCOM && HAS_DMA
+	depends on SND_SOC_QCOM
 	select SND_SOC_LPASS_APQ8016
 	help
           Support for Qualcomm Technologies LPASS audio block in
-- 
2.7.4

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Re: [PATCH v2 01/21] ASoC: Remove depends on HAS_DMA in case of platform dependency

[Mark Brown]

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On Fri, Mar 16, 2018 at 02:51:34PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.

Acked-by: Mark Brown <broonie@kernel.org>

Thanks again for doing this work, it's really good to see!

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[PATCH v2 02/21] ata: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/ata/Kconfig | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a7120d6211546949..9eaeed1fb237fa33 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -398,7 +398,6 @@ config SATA_DWC_VDEBUG
 
 config SATA_HIGHBANK
 	tristate "Calxeda Highbank SATA support"
-	depends on HAS_DMA
 	depends on ARCH_HIGHBANK || COMPILE_TEST
 	help
 	  This option enables support for the Calxeda Highbank SoC's
@@ -408,7 +407,6 @@ config SATA_HIGHBANK
 
 config SATA_MV
 	tristate "Marvell SATA support"
-	depends on HAS_DMA
 	depends on PCI || ARCH_DOVE || ARCH_MV78XX0 || \
 		   ARCH_MVEBU || ARCH_ORION5X || COMPILE_TEST
 	select GENERIC_PHY
-- 
2.7.4

[PATCH v2 03/21] crypto: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/crypto/Kconfig | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 4b741b83e23ff4de..3d27da7a430c0bc2 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -419,7 +419,7 @@ config CRYPTO_DEV_EXYNOS_RNG
 config CRYPTO_DEV_S5P
 	tristate "Support for Samsung S5PV210/Exynos crypto accelerator"
 	depends on ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
-	depends on HAS_IOMEM && HAS_DMA
+	depends on HAS_IOMEM
 	select CRYPTO_AES
 	select CRYPTO_BLKCIPHER
 	help
@@ -473,7 +473,6 @@ config CRYPTO_DEV_BFIN_CRC
 
 config CRYPTO_DEV_ATMEL_AUTHENC
 	tristate "Support for Atmel IPSEC/SSL hw accelerator"
-	depends on HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
 	select CRYPTO_AUTHENC
 	select CRYPTO_DEV_ATMEL_AES
@@ -486,7 +485,6 @@ config CRYPTO_DEV_ATMEL_AUTHENC
 
 config CRYPTO_DEV_ATMEL_AES
 	tristate "Support for Atmel AES hw accelerator"
-	depends on HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
 	select CRYPTO_AES
 	select CRYPTO_AEAD
@@ -501,7 +499,6 @@ config CRYPTO_DEV_ATMEL_AES
 
 config CRYPTO_DEV_ATMEL_TDES
 	tristate "Support for Atmel DES/TDES hw accelerator"
-	depends on HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
 	select CRYPTO_DES
 	select CRYPTO_BLKCIPHER
@@ -515,7 +512,6 @@ config CRYPTO_DEV_ATMEL_TDES
 
 config CRYPTO_DEV_ATMEL_SHA
 	tristate "Support for Atmel SHA hw accelerator"
-	depends on HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
 	select CRYPTO_HASH
 	help
@@ -581,7 +577,8 @@ config CRYPTO_DEV_CAVIUM_ZIP
 
 config CRYPTO_DEV_QCE
 	tristate "Qualcomm crypto engine accelerator"
-	depends on (ARCH_QCOM || COMPILE_TEST) && HAS_DMA && HAS_IOMEM
+	depends on ARCH_QCOM || COMPILE_TEST
+	depends on HAS_IOMEM
 	select CRYPTO_AES
 	select CRYPTO_DES
 	select CRYPTO_ECB
@@ -605,7 +602,6 @@ source "drivers/crypto/vmx/Kconfig"
 config CRYPTO_DEV_IMGTEC_HASH
 	tristate "Imagination Technologies hardware hash accelerator"
 	depends on MIPS || COMPILE_TEST
-	depends on HAS_DMA
 	select CRYPTO_MD5
 	select CRYPTO_SHA1
 	select CRYPTO_SHA256
@@ -657,7 +653,6 @@ config CRYPTO_DEV_ROCKCHIP
 
 config CRYPTO_DEV_MEDIATEK
 	tristate "MediaTek's EIP97 Cryptographic Engine driver"
-	depends on HAS_DMA
 	depends on (ARM && ARCH_MEDIATEK) || COMPILE_TEST
 	select CRYPTO_AES
 	select CRYPTO_AEAD
@@ -695,7 +690,7 @@ source "drivers/crypto/stm32/Kconfig"
 
 config CRYPTO_DEV_SAFEXCEL
 	tristate "Inside Secure's SafeXcel cryptographic engine driver"
-	depends on HAS_DMA && OF
+	depends on OF
 	depends on (ARM64 && ARCH_MVEBU) || (COMPILE_TEST && 64BIT)
 	select CRYPTO_AES
 	select CRYPTO_BLKCIPHER
@@ -713,7 +708,6 @@ config CRYPTO_DEV_SAFEXCEL
 config CRYPTO_DEV_ARTPEC6
 	tristate "Support for Axis ARTPEC-6/7 hardware crypto acceleration."
 	depends on ARM && (ARCH_ARTPEC || COMPILE_TEST)
-	depends on HAS_DMA
 	depends on OF
 	select CRYPTO_AEAD
 	select CRYPTO_AES
-- 
2.7.4

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Re: [PATCH v2 03/21] crypto: Remove depends on HAS_DMA in case of platform dependency

[Herbert Xu]

On Fri, Mar 16, 2018 at 02:51:36PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

[PATCH v2 04/21] fbdev: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/video/fbdev/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 11e699f1062b78ea..abee481f5fb778dd 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -2174,7 +2174,8 @@ config FB_XILINX
 
 config FB_GOLDFISH
 	tristate "Goldfish Framebuffer"
-	depends on FB && HAS_DMA && (GOLDFISH || COMPILE_TEST)
+	depends on FB
+	depends on GOLDFISH || COMPILE_TEST
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
-- 
2.7.4

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Re: [PATCH v2 04/21] fbdev: Remove depends on HAS_DMA in case of platform dependency

[Bartlomiej Zolnierkiewicz]

On Friday, March 16, 2018 02:51:37 PM Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

[PATCH v2 05/21] firewire: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/firewire/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 145974f9662b63e6..4199849e37585181 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -1,5 +1,4 @@
 menu "IEEE 1394 (FireWire) support"
-	depends on HAS_DMA
 	depends on PCI || COMPILE_TEST
 	# firewire-core does not depend on PCI but is
 	# not useful without PCI controller driver
-- 
2.7.4

[PATCH v2 06/21] fpga: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/fpga/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index f47ef848bcd056d5..fd539132542e30ee 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -53,7 +53,6 @@ config FPGA_MGR_ALTERA_CVP
 config FPGA_MGR_ZYNQ_FPGA
 	tristate "Xilinx Zynq FPGA"
 	depends on ARCH_ZYNQ || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  FPGA manager driver support for Xilinx Zynq FPGAs.
 
-- 
2.7.4

Re: [PATCH v2 06/21] fpga: Remove depends on HAS_DMA in case of platform dependency

[Alan Tull]

On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:

Hi Geert,

This essentially removes this commit

commit 1c8cb409491403036919dd1c6b45013dc8835a44
Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date:   Wed Aug 3 13:45:46 2016 -0700

    drivers/fpga/Kconfig: fix build failure

    While building m32r allmodconfig the build is failing with the error:

      ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined!

    Xilinx Zynq FPGA is using DMA but there was no dependency while
    building.

    Link: http://lkml.kernel.org/r/1464346526-13913-1-git-send-email-sudipm.mukherjee@gmail.com
    Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
    Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
    Cc: Alan Tull <atull@opensource.altera.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Alan

> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
>
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
>
> This simplifies the dependencies, and allows to improve compile-testing.
>
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Split per subsystem.
> ---
>  drivers/fpga/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index f47ef848bcd056d5..fd539132542e30ee 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -53,7 +53,6 @@ config FPGA_MGR_ALTERA_CVP
>  config FPGA_MGR_ZYNQ_FPGA
>         tristate "Xilinx Zynq FPGA"
>         depends on ARCH_ZYNQ || COMPILE_TEST
> -       depends on HAS_DMA
>         help
>           FPGA manager driver support for Xilinx Zynq FPGAs.
>
> --
> 2.7.4
>

Re: [PATCH v2 06/21] fpga: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Hi Alan,

On Mon, Mar 19, 2018 at 5:06 PM, Alan Tull <atull@kernel.org> wrote:
> On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
> This essentially removes this commit
>
> commit 1c8cb409491403036919dd1c6b45013dc8835a44
> Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
> Date:   Wed Aug 3 13:45:46 2016 -0700
>
>     drivers/fpga/Kconfig: fix build failure
>
>     While building m32r allmodconfig the build is failing with the error:
>
>       ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined!
>
>     Xilinx Zynq FPGA is using DMA but there was no dependency while
>     building.
>
>     Link: http://lkml.kernel.org/r/1464346526-13913-1-git-send-email-sudipm.mukherjee@gmail.com
>     Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
>     Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
>     Cc: Alan Tull <atull@opensource.altera.com>
>     Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
>     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Yes it does. The major change is that the first (core) series introduces
all needed dummies to do successful compile-testing on NO_DMA=y platforms.

>> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
>> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
>> In most cases this other symbol is an architecture or platform specific
>> symbol, or PCI.
>>
>> Generic symbols and drivers without platform dependencies keep their
>> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
>> cannot work anyway.
>>
>> This simplifies the dependencies, and allows to improve compile-testing.
>>
>> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Reviewed-by: Mark Brown <broonie@kernel.org>
>> Acked-by: Robin Murphy <robin.murphy@arm.com>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Re: [PATCH v2 06/21] fpga: Remove depends on HAS_DMA in case of platform dependency

[Alan Tull]

On Tue, Mar 20, 2018 at 5:04 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:

Hi Geert,

> Hi Alan,
>
> On Mon, Mar 19, 2018 at 5:06 PM, Alan Tull <atull@kernel.org> wrote:
>> On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
>> <geert@linux-m68k.org> wrote:
>> This essentially removes this commit
>>
>> commit 1c8cb409491403036919dd1c6b45013dc8835a44
>> Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
>> Date:   Wed Aug 3 13:45:46 2016 -0700
>>
>>     drivers/fpga/Kconfig: fix build failure
>>
>>     While building m32r allmodconfig the build is failing with the error:
>>
>>       ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined!
>>
>>     Xilinx Zynq FPGA is using DMA but there was no dependency while
>>     building.
>>
>>     Link: http://lkml.kernel.org/r/1464346526-13913-1-git-send-email-sudipm.mukherjee@gmail.com
>>     Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
>>     Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
>>     Cc: Alan Tull <atull@opensource.altera.com>
>>     Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
>>     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
>
> Yes it does. The major change is that the first (core) series introduces
> all needed dummies to do successful compile-testing on NO_DMA=y platforms.

OK yes, I looked at the first patch that does the fix.  Looks good.
Thanks for doing this.

>
>>> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
>>> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
>>> In most cases this other symbol is an architecture or platform specific
>>> symbol, or PCI.
>>>
>>> Generic symbols and drivers without platform dependencies keep their
>>> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
>>> cannot work anyway.
>>>
>>> This simplifies the dependencies, and allows to improve compile-testing.
>>>
>>> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
>>> Reviewed-by: Mark Brown <broonie@kernel.org>
>>> Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Alan Tull <atull@kernel.org>

Regards,
Alan

>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
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[PATCH v2 07/21] i2c: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/i2c/busses/Kconfig | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e2954fb86d659f36..2ce9bbd5d56ed06a 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -725,7 +725,6 @@ config I2C_MPC
 config I2C_MT65XX
 	tristate "MediaTek I2C adapter"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  This selects the MediaTek(R) Integrated Inter Circuit bus driver
 	  for MT65xx and MT81xx.
@@ -903,7 +902,6 @@ config I2C_SH7760
 
 config I2C_SH_MOBILE
 	tristate "SuperH Mobile I2C Controller"
-	depends on HAS_DMA
 	depends on ARCH_SHMOBILE || ARCH_RENESAS || COMPILE_TEST
 	help
 	  If you say yes to this option, support will be included for the
@@ -1106,7 +1104,6 @@ config I2C_XLP9XX
 
 config I2C_RCAR
 	tristate "Renesas R-Car I2C Controller"
-	depends on HAS_DMA
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select I2C_SLAVE
 	help
-- 
2.7.4

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[PATCH v2 08/21] iio: adc: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/iio/adc/Kconfig | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 72bc2b71765ae2ff..57f46e88f5c2536e 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -158,7 +158,6 @@ config AT91_SAMA5D2_ADC
 	tristate "Atmel AT91 SAMA5D2 ADC"
 	depends on ARCH_AT91 || COMPILE_TEST
 	depends on HAS_IOMEM
-	depends on HAS_DMA
 	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Atmel SAMA5D2 ADC which is
@@ -647,7 +646,6 @@ config SD_ADC_MODULATOR
 config STM32_ADC_CORE
 	tristate "STMicroelectronics STM32 adc core"
 	depends on ARCH_STM32 || COMPILE_TEST
-	depends on HAS_DMA
 	depends on OF
 	depends on REGULATOR
 	select IIO_BUFFER
-- 
2.7.4

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Re: [PATCH v2 08/21] iio: adc: Remove depends on HAS_DMA in case of platform dependency

[Jonathan Cameron]

On Fri, 16 Mar 2018 14:51:41 +0100
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
Great.
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Thanks for doing this - this has been annoying for a long time :)

> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Split per subsystem.
> ---
>  drivers/iio/adc/Kconfig | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 72bc2b71765ae2ff..57f46e88f5c2536e 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -158,7 +158,6 @@ config AT91_SAMA5D2_ADC
>  	tristate "Atmel AT91 SAMA5D2 ADC"
>  	depends on ARCH_AT91 || COMPILE_TEST
>  	depends on HAS_IOMEM
> -	depends on HAS_DMA
>  	select IIO_TRIGGERED_BUFFER
>  	help
>  	  Say yes here to build support for Atmel SAMA5D2 ADC which is
> @@ -647,7 +646,6 @@ config SD_ADC_MODULATOR
>  config STM32_ADC_CORE
>  	tristate "STMicroelectronics STM32 adc core"
>  	depends on ARCH_STM32 || COMPILE_TEST
> -	depends on HAS_DMA
>  	depends on OF
>  	depends on REGULATOR
>  	select IIO_BUFFER

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[PATCH v2 09/21] iommu: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/iommu/Kconfig | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index f3a21343e636a8f2..32e91398c0555272 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -23,7 +23,7 @@ config IOMMU_IO_PGTABLE
 config IOMMU_IO_PGTABLE_LPAE
 	bool "ARMv7/v8 Long Descriptor Format"
 	select IOMMU_IO_PGTABLE
-	depends on HAS_DMA && (ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64))
+	depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
 	help
 	  Enable support for the ARM long descriptor pagetable format.
 	  This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
@@ -42,7 +42,7 @@ config IOMMU_IO_PGTABLE_LPAE_SELFTEST
 config IOMMU_IO_PGTABLE_ARMV7S
 	bool "ARMv7/v8 Short Descriptor Format"
 	select IOMMU_IO_PGTABLE
-	depends on HAS_DMA && (ARM || ARM64 || COMPILE_TEST)
+	depends on ARM || ARM64 || COMPILE_TEST
 	help
 	  Enable support for the ARM Short-descriptor pagetable format.
 	  This supports 32-bit virtual and physical addresses mapped using
@@ -374,7 +374,6 @@ config QCOM_IOMMU
 	# Note: iommu drivers cannot (yet?) be built as modules
 	bool "Qualcomm IOMMU Support"
 	depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
-	depends on HAS_DMA
 	select IOMMU_API
 	select IOMMU_IO_PGTABLE_LPAE
 	select ARM_DMA_USE_IOMMU
-- 
2.7.4

Re: [PATCH v2 09/21] iommu: Remove depends on HAS_DMA in case of platform dependency

[Joerg Roedel]

On Fri, Mar 16, 2018 at 02:51:42PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Joerg Roedel <jroedel@suse.de>

[PATCH v2 10/21] lightnvm: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Notes:
  - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops(),
    which does not exist if HAS_DMA=n (Do we need a dummy? The use of
    set_dma_ops() in this driver is questionable),
  - SND_SOC_LPASS_IPQ806X and SND_SOC_LPASS_PLATFORM loose their
    dependency on HAS_DMA, as they are selected from
    SND_SOC_APQ8016_SBC.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/lightnvm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
index 10c08982185a572f..9c03f35d9df113c6 100644
--- a/drivers/lightnvm/Kconfig
+++ b/drivers/lightnvm/Kconfig
@@ -4,7 +4,7 @@
 
 menuconfig NVM
 	bool "Open-Channel SSD target support"
-	depends on BLOCK && HAS_DMA && PCI
+	depends on BLOCK && PCI
 	select BLK_DEV_NVME
 	help
 	  Say Y here to get to enable Open-channel SSDs.
-- 
2.7.4

Re: [PATCH v2 10/21] lightnvm: Remove depends on HAS_DMA in case of platform dependency

[Matias Bjørling]

On 03/16/2018 02:51 PM, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Notes:
>    - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops(),
>      which does not exist if HAS_DMA=n (Do we need a dummy? The use of
>      set_dma_ops() in this driver is questionable),
>    - SND_SOC_LPASS_IPQ806X and SND_SOC_LPASS_PLATFORM loose their
>      dependency on HAS_DMA, as they are selected from
>      SND_SOC_APQ8016_SBC.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
> ---
> v2:
>    - Add Reviewed-by, Acked-by,
>    - Drop RFC state,
>    - Split per subsystem.
> ---
>   drivers/lightnvm/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
> index 10c08982185a572f..9c03f35d9df113c6 100644
> --- a/drivers/lightnvm/Kconfig
> +++ b/drivers/lightnvm/Kconfig
> @@ -4,7 +4,7 @@
>   
>   menuconfig NVM
>   	bool "Open-Channel SSD target support"
> -	depends on BLOCK && HAS_DMA && PCI
> +	depends on BLOCK && PCI
>   	select BLK_DEV_NVME
>   	help
>   	  Say Y here to get to enable Open-channel SSDs.
> 

Looks good.

Reviewed-by: Matias Bjørling <mb@lightnvm.io>

RE: [PATCH v2 10/21] lightnvm: Remove depends on HAS_DMA in case of platform dependency

[Madalin-cristian Bucur]

> -----Original Message-----
> From: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org]
> On Behalf Of Geert Uytterhoeven
> Sent: Friday, March 16, 2018 3:52 PM
> To: Christoph Hellwig <hch@lst.de>; Marek Szyprowski
> <m.szyprowski@samsung.com>; Robin Murphy <robin.murphy@arm.com>;
> Felipe Balbi <balbi@kernel.org>; Greg Kroah-Hartman
> <gregkh@linuxfoundation.org>; James E . J . Bottomley
> <jejb@linux.vnet.ibm.com>; Martin K . Petersen
> <martin.petersen@oracle.com>; Andrew Morton <akpm@linux-
> foundation.org>; Mark Brown <broonie@kernel.org>; Liam Girdwood
> <lgirdwood@gmail.com>; Tejun Heo <tj@kernel.org>; Herbert Xu
> <herbert@gondor.apana.org.au>; David S . Miller <davem@davemloft.net>;
> Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>; Stefan Richter
> <stefanr@s5r6.in-berlin.de>; Alan Tull <atull@kernel.org>; Moritz Fischer
> <mdf@kernel.org>; Wolfram Sang <wsa@the-dreams.de>; Jonathan Cameron
> <jic23@kernel.org>; Joerg Roedel <joro@8bytes.org>; Matias Bjorling
> <mb@lightnvm.io>; Jassi Brar <jassisinghbrar@gmail.com>; Mauro Carvalho
> Chehab <mchehab@kernel.org>; Ulf Hansson <ulf.hansson@linaro.org>; David
> Woodhouse <dwmw2@infradead.org>; Brian Norris
> <computersforpeace@gmail.com>; Marek Vasut <marek.vasut@gmail.com>;
> Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>; Boris Brezillon
> <boris.brezillon@free-electrons.com>; Richard Weinberger <richard@nod.at>;
> Kalle Valo <kvalo@codeaurora.org>; Ohad Ben-Cohen <ohad@wizery.com>;
> Bjorn Andersson <bjorn.andersson@linaro.org>; Eric Anholt <eric@anholt.net>;
> Stefan Wahren <stefan.wahren@i2se.com>
> Cc: iommu@lists.linux-foundation.org; linux-usb@vger.kernel.org; linux-
> scsi@vger.kernel.org; alsa-devel@alsa-project.org; linux-ide@vger.kernel.org;
> linux-crypto@vger.kernel.org; linux-fbdev@vger.kernel.org; linux1394-
> devel@lists.sourceforge.net; linux-fpga@vger.kernel.org; linux-
> i2c@vger.kernel.org; linux-iio@vger.kernel.org; linux-block@vger.kernel.org;
> linux-media@vger.kernel.org; linux-mmc@vger.kernel.org; linux-
> mtd@lists.infradead.org; netdev@vger.kernel.org; linux-
> remoteproc@vger.kernel.org; linux-serial@vger.kernel.org; linux-
> spi@vger.kernel.org; devel@driverdev.osuosl.org; linux-
> kernel@vger.kernel.org; Geert Uytterhoeven <geert@linux-m68k.org>
> Subject: [PATCH v2 10/21] lightnvm: Remove depends on HAS_DMA in case of
> platform dependency
> 
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on
> another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Notes:
>   - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops(),
>     which does not exist if HAS_DMA=n (Do we need a dummy? The use of
>     set_dma_ops() in this driver is questionable),

Hi,

The set_dma_ops() is no longer required in the fsl/fman, I'll send a patch to remove it.

Thanks

>   - SND_SOC_LPASS_IPQ806X and SND_SOC_LPASS_PLATFORM loose their
>     dependency on HAS_DMA, as they are selected from
>     SND_SOC_APQ8016_SBC.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Split per subsystem.
> ---
>  drivers/lightnvm/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
> index 10c08982185a572f..9c03f35d9df113c6 100644
> --- a/drivers/lightnvm/Kconfig
> +++ b/drivers/lightnvm/Kconfig
> @@ -4,7 +4,7 @@
> 
>  menuconfig NVM
>  	bool "Open-Channel SSD target support"
> -	depends on BLOCK && HAS_DMA && PCI
> +	depends on BLOCK && PCI
>  	select BLK_DEV_NVME
>  	help
>  	  Say Y here to get to enable Open-channel SSDs.
> --
> 2.7.4

Re: [PATCH v2 10/21] lightnvm: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Hi Madalin-cristian,

On Mon, Mar 19, 2018 at 6:27 AM, Madalin-cristian Bucur
<madalin.bucur@nxp.com> wrote:
>> -----Original Message-----
>> From: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org]
>> On Behalf Of Geert Uytterhoeven
>> Remove dependencies on HAS_DMA where a Kconfig symbol depends on
>> another
>> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
>> In most cases this other symbol is an architecture or platform specific
>> symbol, or PCI.
>>
>> Generic symbols and drivers without platform dependencies keep their
>> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
>> cannot work anyway.
>>
>> This simplifies the dependencies, and allows to improve compile-testing.
>>
>> Notes:
>>   - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops(),
>>     which does not exist if HAS_DMA=n (Do we need a dummy? The use of
>>     set_dma_ops() in this driver is questionable),
>
> Hi,
>
> The set_dma_ops() is no longer required in the fsl/fman, I'll send a patch to remove it.

Thank you, looking forward to it!

>>   - SND_SOC_LPASS_IPQ806X and SND_SOC_LPASS_PLATFORM loose their
>>     dependency on HAS_DMA, as they are selected from
>>     SND_SOC_APQ8016_SBC.
>>
>> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Reviewed-by: Mark Brown <broonie@kernel.org>
>> Acked-by: Robin Murphy <robin.murphy@arm.com>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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[PATCH v2 11/21] mailbox: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Notes:
  - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops(),
    which does not exist if HAS_DMA=n (Do we need a dummy? The use of
    set_dma_ops() in this driver is questionable),
  - SND_SOC_LPASS_IPQ806X and SND_SOC_LPASS_PLATFORM loose their
    dependency on HAS_DMA, as they are selected from
    SND_SOC_APQ8016_SBC.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/mailbox/Kconfig | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index ba2f1525f4eef454..f3c68fe15180d035 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -154,7 +154,6 @@ config XGENE_SLIMPRO_MBOX
 config BCM_PDC_MBOX
 	tristate "Broadcom FlexSparx DMA Mailbox"
 	depends on ARCH_BCM_IPROC || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Mailbox implementation for the Broadcom FlexSparx DMA ring manager,
 	  which provides access to various offload engines on Broadcom
@@ -164,7 +163,6 @@ config BCM_FLEXRM_MBOX
 	tristate "Broadcom FlexRM Mailbox"
 	depends on ARM64
 	depends on ARCH_BCM_IPROC || COMPILE_TEST
-	depends on HAS_DMA
 	select GENERIC_MSI_IRQ_DOMAIN
 	default m if ARCH_BCM_IPROC
 	help
-- 
2.7.4

[PATCH v2 12/21] media: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Note:
  - The various VIDEOBUF*DMA* symbols had to loose their dependencies on
    HAS_DMA, as they are selected by several individual drivers.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Drop dependency of VIDEOBUF{,2}_DMA_{CONTIG,SG} on HAS_DMA,
  - Drop new dependencies of VIDEO_IPU3_CIO2 and DVB_C8SECTPFE on
    HAS_DMA,
  - Split per subsystem.
---
 drivers/media/common/videobuf2/Kconfig       |  2 --
 drivers/media/pci/dt3155/Kconfig             |  1 -
 drivers/media/pci/intel/ipu3/Kconfig         |  1 -
 drivers/media/pci/solo6x10/Kconfig           |  1 -
 drivers/media/pci/sta2x11/Kconfig            |  1 -
 drivers/media/pci/tw5864/Kconfig             |  1 -
 drivers/media/pci/tw686x/Kconfig             |  1 -
 drivers/media/platform/Kconfig               | 40 +++++++++-------------------
 drivers/media/platform/am437x/Kconfig        |  2 +-
 drivers/media/platform/atmel/Kconfig         |  4 +--
 drivers/media/platform/blackfin/Kconfig      |  1 -
 drivers/media/platform/davinci/Kconfig       |  6 -----
 drivers/media/platform/marvell-ccic/Kconfig  |  3 +--
 drivers/media/platform/rcar-vin/Kconfig      |  2 +-
 drivers/media/platform/soc_camera/Kconfig    |  3 +--
 drivers/media/platform/sti/c8sectpfe/Kconfig |  2 +-
 drivers/media/v4l2-core/Kconfig              |  2 --
 drivers/staging/media/davinci_vpfe/Kconfig   |  1 -
 drivers/staging/media/omap4iss/Kconfig       |  1 -
 19 files changed, 20 insertions(+), 55 deletions(-)

diff --git a/drivers/media/common/videobuf2/Kconfig b/drivers/media/common/videobuf2/Kconfig
index 17c32ea58395d78f..4ed11b46676ac4d0 100644
--- a/drivers/media/common/videobuf2/Kconfig
+++ b/drivers/media/common/videobuf2/Kconfig
@@ -12,7 +12,6 @@ config VIDEOBUF2_MEMOPS
 
 config VIDEOBUF2_DMA_CONTIG
 	tristate
-	depends on HAS_DMA
 	select VIDEOBUF2_CORE
 	select VIDEOBUF2_MEMOPS
 	select DMA_SHARED_BUFFER
@@ -25,7 +24,6 @@ config VIDEOBUF2_VMALLOC
 
 config VIDEOBUF2_DMA_SG
 	tristate
-	depends on HAS_DMA
 	select VIDEOBUF2_CORE
 	select VIDEOBUF2_MEMOPS
 
diff --git a/drivers/media/pci/dt3155/Kconfig b/drivers/media/pci/dt3155/Kconfig
index 5145e0dfa2aa9e12..858b0f2f15bef9c8 100644
--- a/drivers/media/pci/dt3155/Kconfig
+++ b/drivers/media/pci/dt3155/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_DT3155
 	tristate "DT3155 frame grabber"
 	depends on PCI && VIDEO_DEV && VIDEO_V4L2
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	default n
 	---help---
diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig
index a82d3fe277d2cdec..2533ec1cb1177715 100644
--- a/drivers/media/pci/intel/ipu3/Kconfig
+++ b/drivers/media/pci/intel/ipu3/Kconfig
@@ -4,7 +4,6 @@ config VIDEO_IPU3_CIO2
 	depends on VIDEO_V4L2_SUBDEV_API
 	depends on X86 || COMPILE_TEST
 	depends on MEDIA_CONTROLLER
-	depends on HAS_DMA
 	depends on ACPI
 	select V4L2_FWNODE
 	select VIDEOBUF2_DMA_SG
diff --git a/drivers/media/pci/solo6x10/Kconfig b/drivers/media/pci/solo6x10/Kconfig
index 0fb91dc7ca73529e..d9e06a6bf1ebc1a7 100644
--- a/drivers/media/pci/solo6x10/Kconfig
+++ b/drivers/media/pci/solo6x10/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_SOLO6X10
 	tristate "Bluecherry / Softlogic 6x10 capture cards (MPEG-4/H.264)"
 	depends on PCI && VIDEO_DEV && SND && I2C
-	depends on HAS_DMA
 	select BITREVERSE
 	select FONT_SUPPORT
 	select FONT_8x16
diff --git a/drivers/media/pci/sta2x11/Kconfig b/drivers/media/pci/sta2x11/Kconfig
index e03587b1af714199..7b856395ede9295c 100644
--- a/drivers/media/pci/sta2x11/Kconfig
+++ b/drivers/media/pci/sta2x11/Kconfig
@@ -1,7 +1,6 @@
 config STA2X11_VIP
 	tristate "STA2X11 VIP Video For Linux"
 	depends on STA2X11
-	depends on HAS_DMA
 	select VIDEO_ADV7180 if MEDIA_SUBDRV_AUTOSELECT
 	select VIDEOBUF2_DMA_CONTIG
 	depends on PCI && VIDEO_V4L2 && VIRT_TO_BUS
diff --git a/drivers/media/pci/tw5864/Kconfig b/drivers/media/pci/tw5864/Kconfig
index 87c8f327e2d49dfa..760fb11dfeaef47b 100644
--- a/drivers/media/pci/tw5864/Kconfig
+++ b/drivers/media/pci/tw5864/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_TW5864
 	tristate "Techwell TW5864 video/audio grabber and encoder"
 	depends on VIDEO_DEV && PCI && VIDEO_V4L2
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	---help---
 	  Support for boards based on Techwell TW5864 chip which provides
diff --git a/drivers/media/pci/tw686x/Kconfig b/drivers/media/pci/tw686x/Kconfig
index 34ff37712313b780..da8bfee71b44cca5 100644
--- a/drivers/media/pci/tw686x/Kconfig
+++ b/drivers/media/pci/tw686x/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_TW686X
 	tristate "Intersil/Techwell TW686x video capture cards"
 	depends on PCI && VIDEO_DEV && VIDEO_V4L2 && SND
-	depends on HAS_DMA
 	select VIDEOBUF2_VMALLOC
 	select VIDEOBUF2_DMA_CONTIG
 	select VIDEOBUF2_DMA_SG
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index 614fbef08ddcabb0..a45e91006bab80a8 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -36,7 +36,7 @@ source "drivers/media/platform/blackfin/Kconfig"
 config VIDEO_SH_VOU
 	tristate "SuperH VOU video output driver"
 	depends on MEDIA_CAMERA_SUPPORT
-	depends on VIDEO_DEV && I2C && HAS_DMA
+	depends on VIDEO_DEV && I2C
 	depends on ARCH_SHMOBILE || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	help
@@ -85,7 +85,7 @@ config VIDEO_MUX
 config VIDEO_OMAP3
 	tristate "OMAP 3 Camera support"
 	depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API && ARCH_OMAP3
-	depends on HAS_DMA && OF
+	depends on OF
 	depends on OMAP_IOMMU
 	select ARM_DMA_USE_IOMMU
 	select VIDEOBUF2_DMA_CONTIG
@@ -102,7 +102,7 @@ config VIDEO_OMAP3_DEBUG
 
 config VIDEO_PXA27x
 	tristate "PXA27x Quick Capture Interface driver"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on PXA27x || COMPILE_TEST
 	select VIDEOBUF2_DMA_SG
 	select SG_SPLIT
@@ -112,7 +112,7 @@ config VIDEO_PXA27x
 
 config VIDEO_QCOM_CAMSS
 	tristate "Qualcomm 8x16 V4L2 Camera Subsystem driver"
-	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && HAS_DMA
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
 	depends on (ARCH_QCOM && IOMMU_DMA) || COMPILE_TEST
 	select VIDEOBUF2_DMA_SG
 	select V4L2_FWNODE
@@ -122,7 +122,6 @@ config VIDEO_S3C_CAMIF
 	depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
 	depends on PM
 	depends on ARCH_S3C64XX || PLAT_S3C24XX || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	---help---
 	  This is a v4l2 driver for s3c24xx and s3c64xx SoC series camera
@@ -133,7 +132,7 @@ config VIDEO_S3C_CAMIF
 
 config VIDEO_STM32_DCMI
 	tristate "STM32 Digital Camera Memory Interface (DCMI) support"
-	depends on VIDEO_V4L2 && OF && HAS_DMA
+	depends on VIDEO_V4L2 && OF
 	depends on ARCH_STM32 || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
@@ -155,7 +154,6 @@ config VIDEO_TI_CAL
 	tristate "TI CAL (Camera Adaptation Layer) driver"
 	depends on VIDEO_DEV && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
 	depends on SOC_DRA7XX || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
 	default n
@@ -183,7 +181,6 @@ if V4L_MEM2MEM_DRIVERS
 config VIDEO_CODA
 	tristate "Chips&Media Coda multi-standard codec IP"
 	depends on VIDEO_DEV && VIDEO_V4L2 && (ARCH_MXC || COMPILE_TEST)
-	depends on HAS_DMA
 	select SRAM
 	select VIDEOBUF2_DMA_CONTIG
 	select VIDEOBUF2_VMALLOC
@@ -201,7 +198,6 @@ config VIDEO_MEDIATEK_JPEG
 	depends on MTK_IOMMU_V1 || COMPILE_TEST
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_MEDIATEK || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	---help---
@@ -213,7 +209,7 @@ config VIDEO_MEDIATEK_JPEG
 
 config VIDEO_MEDIATEK_VPU
 	tristate "Mediatek Video Processor Unit"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	---help---
 	    This driver provides downloading VPU firmware and
@@ -229,7 +225,6 @@ config VIDEO_MEDIATEK_MDP
 	depends on MTK_IOMMU || COMPILE_TEST
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_MEDIATEK || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	select VIDEO_MEDIATEK_VPU
@@ -244,7 +239,7 @@ config VIDEO_MEDIATEK_MDP
 config VIDEO_MEDIATEK_VCODEC
 	tristate "Mediatek Video Codec driver"
 	depends on MTK_IOMMU || COMPILE_TEST
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
@@ -271,7 +266,6 @@ config VIDEO_SAMSUNG_S5P_G2D
 	tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	default n
@@ -283,7 +277,6 @@ config VIDEO_SAMSUNG_S5P_JPEG
 	tristate "Samsung S5P/Exynos3250/Exynos4 JPEG codec driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	---help---
@@ -294,7 +287,6 @@ config VIDEO_SAMSUNG_S5P_MFC
 	tristate "Samsung S5P MFC Video Codec"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	default n
 	help
@@ -304,7 +296,6 @@ config VIDEO_MX2_EMMAPRP
 	tristate "MX2 eMMa-PrP support"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on SOC_IMX27 || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	help
@@ -316,7 +307,6 @@ config VIDEO_SAMSUNG_EXYNOS_GSC
 	tristate "Samsung Exynos G-Scaler driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_EXYNOS || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	help
@@ -325,7 +315,6 @@ config VIDEO_SAMSUNG_EXYNOS_GSC
 config VIDEO_STI_BDISP
 	tristate "STMicroelectronics BDISP 2D blitter driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
-	depends on HAS_DMA
 	depends on ARCH_STI || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
@@ -335,7 +324,6 @@ config VIDEO_STI_BDISP
 config VIDEO_STI_HVA
 	tristate "STMicroelectronics HVA multi-format video encoder V4L2 driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
-	depends on HAS_DMA
 	depends on ARCH_STI || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
@@ -362,7 +350,6 @@ config VIDEO_STI_DELTA
 	tristate "STMicroelectronics DELTA multi-format video decoder V4L2 driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_STI || COMPILE_TEST
-	depends on HAS_DMA
 	help
 		This V4L2 driver enables DELTA multi-format video decoder
 		of STMicroelectronics STiH4xx SoC series allowing hardware
@@ -408,7 +395,7 @@ config VIDEO_SH_VEU
 
 config VIDEO_RENESAS_FDP1
 	tristate "Renesas Fine Display Processor"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_SHMOBILE || COMPILE_TEST
 	depends on (!ARCH_RENESAS && !VIDEO_RENESAS_FCP) || VIDEO_RENESAS_FCP
 	select VIDEOBUF2_DMA_CONTIG
@@ -422,7 +409,7 @@ config VIDEO_RENESAS_FDP1
 
 config VIDEO_RENESAS_JPU
 	tristate "Renesas JPEG Processing Unit"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
@@ -447,7 +434,7 @@ config VIDEO_RENESAS_FCP
 
 config VIDEO_RENESAS_VSP1
 	tristate "Renesas VSP1 Video Processing Engine"
-	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && HAS_DMA
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
 	depends on (ARCH_RENESAS && OF) || COMPILE_TEST
 	depends on (!ARM64 && !VIDEO_RENESAS_FCP) || VIDEO_RENESAS_FCP
 	select VIDEOBUF2_DMA_CONTIG
@@ -460,7 +447,7 @@ config VIDEO_RENESAS_VSP1
 
 config VIDEO_ROCKCHIP_RGA
 	tristate "Rockchip Raster 2d Graphic Acceleration Unit"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on ARCH_ROCKCHIP || COMPILE_TEST
 	select VIDEOBUF2_DMA_SG
 	select V4L2_MEM2MEM_DEV
@@ -477,7 +464,6 @@ config VIDEO_TI_VPE
 	tristate "TI VPE (Video Processing Engine) driver"
 	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on SOC_DRA7XX || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	select VIDEO_TI_VPDMA
@@ -496,7 +482,7 @@ config VIDEO_TI_VPE_DEBUG
 
 config VIDEO_QCOM_VENUS
 	tristate "Qualcomm Venus V4L2 encoder/decoder driver"
-	depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_DEV && VIDEO_V4L2
 	depends on (ARCH_QCOM && IOMMU_DMA) || COMPILE_TEST
 	select QCOM_MDT_LOADER if ARCH_QCOM
 	select QCOM_SCM if ARCH_QCOM
@@ -638,7 +624,7 @@ if SDR_PLATFORM_DRIVERS
 
 config VIDEO_RCAR_DRIF
 	tristate "Renesas Digitial Radio Interface (DRIF)"
-	depends on VIDEO_V4L2 && HAS_DMA
+	depends on VIDEO_V4L2
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select VIDEOBUF2_VMALLOC
 	---help---
diff --git a/drivers/media/platform/am437x/Kconfig b/drivers/media/platform/am437x/Kconfig
index 160e77e9a0fbfa61..f4ce1176e4dc8179 100644
--- a/drivers/media/platform/am437x/Kconfig
+++ b/drivers/media/platform/am437x/Kconfig
@@ -1,6 +1,6 @@
 config VIDEO_AM437X_VPFE
 	tristate "TI AM437x VPFE video capture driver"
-	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && HAS_DMA
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
 	depends on SOC_AM43XX || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
diff --git a/drivers/media/platform/atmel/Kconfig b/drivers/media/platform/atmel/Kconfig
index 55de751e5f51500b..a211ef20f77eadba 100644
--- a/drivers/media/platform/atmel/Kconfig
+++ b/drivers/media/platform/atmel/Kconfig
@@ -1,6 +1,6 @@
 config VIDEO_ATMEL_ISC
 	tristate "ATMEL Image Sensor Controller (ISC) support"
-	depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API && HAS_DMA
+	depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API
 	depends on ARCH_AT91 || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select REGMAP_MMIO
@@ -11,7 +11,7 @@ config VIDEO_ATMEL_ISC
 
 config VIDEO_ATMEL_ISI
 	tristate "ATMEL Image Sensor Interface (ISI) support"
-	depends on VIDEO_V4L2 && OF && HAS_DMA
+	depends on VIDEO_V4L2 && OF
 	depends on ARCH_AT91 || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
diff --git a/drivers/media/platform/blackfin/Kconfig b/drivers/media/platform/blackfin/Kconfig
index 68fa90151b8f40f2..cc239972fa2c3228 100644
--- a/drivers/media/platform/blackfin/Kconfig
+++ b/drivers/media/platform/blackfin/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_BLACKFIN_CAPTURE
 	tristate "Blackfin Video Capture Driver"
 	depends on VIDEO_V4L2 && BLACKFIN && I2C
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	help
 	  V4L2 bridge driver for Blackfin video capture device.
diff --git a/drivers/media/platform/davinci/Kconfig b/drivers/media/platform/davinci/Kconfig
index 55982e681d779d3a..6273853a86f900c3 100644
--- a/drivers/media/platform/davinci/Kconfig
+++ b/drivers/media/platform/davinci/Kconfig
@@ -2,7 +2,6 @@ config VIDEO_DAVINCI_VPIF_DISPLAY
 	tristate "TI DaVinci VPIF V4L2-Display driver"
 	depends on VIDEO_V4L2
 	depends on ARCH_DAVINCI || COMPILE_TEST
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF2_DMA_CONTIG
 	select VIDEO_ADV7343 if MEDIA_SUBDRV_AUTOSELECT
@@ -19,7 +18,6 @@ config VIDEO_DAVINCI_VPIF_CAPTURE
 	tristate "TI DaVinci VPIF video capture driver"
 	depends on VIDEO_V4L2
 	depends on ARCH_DAVINCI || COMPILE_TEST
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
@@ -35,7 +33,6 @@ config VIDEO_DM6446_CCDC
 	tristate "TI DM6446 CCDC video capture driver"
 	depends on VIDEO_V4L2
 	depends on ARCH_DAVINCI || COMPILE_TEST
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF_DMA_CONTIG
 	help
@@ -52,7 +49,6 @@ config VIDEO_DM355_CCDC
 	tristate "TI DM355 CCDC video capture driver"
 	depends on VIDEO_V4L2
 	depends on ARCH_DAVINCI || COMPILE_TEST
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF_DMA_CONTIG
 	help
@@ -68,7 +64,6 @@ config VIDEO_DM355_CCDC
 config VIDEO_DM365_ISIF
 	tristate "TI DM365 ISIF video capture driver"
 	depends on VIDEO_V4L2 && ARCH_DAVINCI
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF_DMA_CONTIG
 	help
@@ -82,7 +77,6 @@ config VIDEO_DM365_ISIF
 config VIDEO_DAVINCI_VPBE_DISPLAY
 	tristate "TI DaVinci VPBE V4L2-Display driver"
 	depends on VIDEO_V4L2 && ARCH_DAVINCI
-	depends on HAS_DMA
 	depends on I2C
 	select VIDEOBUF2_DMA_CONTIG
 	help
diff --git a/drivers/media/platform/marvell-ccic/Kconfig b/drivers/media/platform/marvell-ccic/Kconfig
index 4bf5bd1e90d69fea..7f7868bc6fcbee87 100644
--- a/drivers/media/platform/marvell-ccic/Kconfig
+++ b/drivers/media/platform/marvell-ccic/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_CAFE_CCIC
 	tristate "Marvell 88ALP01 (Cafe) CMOS Camera Controller support"
 	depends on PCI && I2C && VIDEO_V4L2
-	depends on HAS_DMA
 	select VIDEO_OV7670
 	select VIDEOBUF2_VMALLOC
 	select VIDEOBUF2_DMA_CONTIG
@@ -14,7 +13,7 @@ config VIDEO_CAFE_CCIC
 config VIDEO_MMP_CAMERA
 	tristate "Marvell Armada 610 integrated camera controller support"
 	depends on ARCH_MMP && I2C && VIDEO_V4L2
-	depends on HAS_DMA && BROKEN
+	depends on BROKEN
 	select VIDEO_OV7670
 	select I2C_GPIO
 	select VIDEOBUF2_DMA_SG
diff --git a/drivers/media/platform/rcar-vin/Kconfig b/drivers/media/platform/rcar-vin/Kconfig
index af4c98b44d2e22cb..9064337a4bd9fc66 100644
--- a/drivers/media/platform/rcar-vin/Kconfig
+++ b/drivers/media/platform/rcar-vin/Kconfig
@@ -1,6 +1,6 @@
 config VIDEO_RCAR_VIN
 	tristate "R-Car Video Input (VIN) Driver"
-	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA && MEDIA_CONTROLLER
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && MEDIA_CONTROLLER
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_FWNODE
diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
index f5979c12ad618f4a..669d116b8f09b2aa 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -18,9 +18,8 @@ config SOC_CAMERA_PLATFORM
 
 config VIDEO_SH_MOBILE_CEU
 	tristate "SuperH Mobile CEU Interface driver"
-	depends on VIDEO_DEV && SOC_CAMERA && HAS_DMA && HAVE_CLK
+	depends on VIDEO_DEV && SOC_CAMERA && HAVE_CLK
 	depends on ARCH_SHMOBILE || COMPILE_TEST
-	depends on HAS_DMA
 	select VIDEOBUF2_DMA_CONTIG
 	select SOC_CAMERA_SCALE_CROP
 	---help---
diff --git a/drivers/media/platform/sti/c8sectpfe/Kconfig b/drivers/media/platform/sti/c8sectpfe/Kconfig
index 740190f8a3b606d3..7420a50572d347ef 100644
--- a/drivers/media/platform/sti/c8sectpfe/Kconfig
+++ b/drivers/media/platform/sti/c8sectpfe/Kconfig
@@ -1,6 +1,6 @@
 config DVB_C8SECTPFE
 	tristate "STMicroelectronics C8SECTPFE DVB support"
-	depends on PINCTRL && DVB_CORE && I2C && HAS_DMA
+	depends on PINCTRL && DVB_CORE && I2C
 	depends on ARCH_STI || ARCH_MULTIPLATFORM || COMPILE_TEST
 	select FW_LOADER
 	select DEBUG_FS
diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
index 8e37e7c5e0f7e25a..bbbbc42af3dee4a1 100644
--- a/drivers/media/v4l2-core/Kconfig
+++ b/drivers/media/v4l2-core/Kconfig
@@ -65,7 +65,6 @@ config VIDEOBUF_GEN
 
 config VIDEOBUF_DMA_SG
 	tristate
-	depends on HAS_DMA
 	select VIDEOBUF_GEN
 
 config VIDEOBUF_VMALLOC
@@ -74,7 +73,6 @@ config VIDEOBUF_VMALLOC
 
 config VIDEOBUF_DMA_CONTIG
 	tristate
-	depends on HAS_DMA
 	select VIDEOBUF_GEN
 
 config VIDEOBUF_DVB
diff --git a/drivers/staging/media/davinci_vpfe/Kconfig b/drivers/staging/media/davinci_vpfe/Kconfig
index f40a06954a92eaec..0da8d7a5f57f818f 100644
--- a/drivers/staging/media/davinci_vpfe/Kconfig
+++ b/drivers/staging/media/davinci_vpfe/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_DM365_VPFE
 	tristate "DM365 VPFE Media Controller Capture Driver"
 	depends on VIDEO_V4L2 && ARCH_DAVINCI_DM365 && !VIDEO_DM365_ISIF
-	depends on HAS_DMA
 	depends on VIDEO_V4L2_SUBDEV_API
 	depends on VIDEO_DAVINCI_VPBE_DISPLAY
 	select VIDEOBUF2_DMA_CONTIG
diff --git a/drivers/staging/media/omap4iss/Kconfig b/drivers/staging/media/omap4iss/Kconfig
index 46183464ee79f896..dbdb1ae82fdab323 100644
--- a/drivers/staging/media/omap4iss/Kconfig
+++ b/drivers/staging/media/omap4iss/Kconfig
@@ -1,7 +1,6 @@
 config VIDEO_OMAP4
 	tristate "OMAP 4 Camera support"
 	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && I2C && ARCH_OMAP4
-	depends on HAS_DMA
 	select MFD_SYSCON
 	select VIDEOBUF2_DMA_CONTIG
 	---help---
-- 
2.7.4

[PATCH v2 13/21] mmc: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/mmc/host/Kconfig | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 620c2d90a646f387..f6d43348b4a3e5d4 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -358,7 +358,6 @@ config MMC_MESON_MX_SDIO
 	tristate "Amlogic Meson6/Meson8/Meson8b SD/MMC Host Controller support"
 	depends on ARCH_MESON || COMPILE_TEST
 	depends on COMMON_CLK
-	depends on HAS_DMA
 	depends on OF
 	help
 	  This selects support for the SD/MMC Host Controller on
@@ -401,7 +400,6 @@ config MMC_OMAP
 
 config MMC_OMAP_HS
 	tristate "TI OMAP High Speed Multimedia Card Interface support"
-	depends on HAS_DMA
 	depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || COMPILE_TEST
 	help
 	  This selects the TI OMAP High Speed Multimedia card Interface.
@@ -511,7 +509,6 @@ config MMC_DAVINCI
 
 config MMC_GOLDFISH
 	tristate "goldfish qemu Multimedia Card Interface support"
-	depends on HAS_DMA
 	depends on GOLDFISH || COMPILE_TEST
 	help
 	  This selects the Goldfish Multimedia card Interface emulation
@@ -605,7 +602,7 @@ config MMC_SDHI
 
 config MMC_SDHI_SYS_DMAC
 	tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC"
-	depends on MMC_SDHI && HAS_DMA
+	depends on MMC_SDHI
 	default MMC_SDHI if (SUPERH || ARM)
 	help
 	  This provides DMA support for SDHI SD/SDIO controllers
@@ -615,7 +612,7 @@ config MMC_SDHI_SYS_DMAC
 config MMC_SDHI_INTERNAL_DMAC
 	tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
 	depends on ARM64 || COMPILE_TEST
-	depends on MMC_SDHI && HAS_DMA
+	depends on MMC_SDHI
 	default MMC_SDHI if ARM64
 	help
 	  This provides DMA support for SDHI SD/SDIO controllers
@@ -688,7 +685,6 @@ config MMC_CAVIUM_THUNDERX
 
 config MMC_DW
 	tristate "Synopsys DesignWare Memory Card Interface"
-	depends on HAS_DMA
 	depends on ARC || ARM || ARM64 || MIPS || COMPILE_TEST
 	help
 	  This selects support for the Synopsys DesignWare Mobile Storage IP
@@ -758,7 +754,6 @@ config MMC_DW_ZX
 
 config MMC_SH_MMCIF
 	tristate "SuperH Internal MMCIF support"
-	depends on HAS_DMA
 	depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
 	help
 	  This selects the MMC Host Interface controller (MMCIF) found in various
@@ -878,7 +873,6 @@ config MMC_TOSHIBA_PCI
 config MMC_BCM2835
 	tristate "Broadcom BCM2835 SDHOST MMC Controller support"
 	depends on ARCH_BCM2835 || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  This selects the BCM2835 SDHOST MMC controller. If you have
 	  a BCM2835 platform with SD or MMC devices, say Y or M here.
-- 
2.7.4

Re: [PATCH v2 13/21] mmc: Remove depends on HAS_DMA in case of platform dependency

[Ulf Hansson]

On 16 March 2018 at 14:51, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
>
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
>
> This simplifies the dependencies, and allows to improve compile-testing.
>
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Ulf Hansson <ulf.hansson@linaro.org>

> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Split per subsystem.
> ---
>  drivers/mmc/host/Kconfig | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 620c2d90a646f387..f6d43348b4a3e5d4 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -358,7 +358,6 @@ config MMC_MESON_MX_SDIO
>         tristate "Amlogic Meson6/Meson8/Meson8b SD/MMC Host Controller support"
>         depends on ARCH_MESON || COMPILE_TEST
>         depends on COMMON_CLK
> -       depends on HAS_DMA
>         depends on OF
>         help
>           This selects support for the SD/MMC Host Controller on
> @@ -401,7 +400,6 @@ config MMC_OMAP
>
>  config MMC_OMAP_HS
>         tristate "TI OMAP High Speed Multimedia Card Interface support"
> -       depends on HAS_DMA
>         depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || COMPILE_TEST
>         help
>           This selects the TI OMAP High Speed Multimedia card Interface.
> @@ -511,7 +509,6 @@ config MMC_DAVINCI
>
>  config MMC_GOLDFISH
>         tristate "goldfish qemu Multimedia Card Interface support"
> -       depends on HAS_DMA
>         depends on GOLDFISH || COMPILE_TEST
>         help
>           This selects the Goldfish Multimedia card Interface emulation
> @@ -605,7 +602,7 @@ config MMC_SDHI
>
>  config MMC_SDHI_SYS_DMAC
>         tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC"
> -       depends on MMC_SDHI && HAS_DMA
> +       depends on MMC_SDHI
>         default MMC_SDHI if (SUPERH || ARM)
>         help
>           This provides DMA support for SDHI SD/SDIO controllers
> @@ -615,7 +612,7 @@ config MMC_SDHI_SYS_DMAC
>  config MMC_SDHI_INTERNAL_DMAC
>         tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
>         depends on ARM64 || COMPILE_TEST
> -       depends on MMC_SDHI && HAS_DMA
> +       depends on MMC_SDHI
>         default MMC_SDHI if ARM64
>         help
>           This provides DMA support for SDHI SD/SDIO controllers
> @@ -688,7 +685,6 @@ config MMC_CAVIUM_THUNDERX
>
>  config MMC_DW
>         tristate "Synopsys DesignWare Memory Card Interface"
> -       depends on HAS_DMA
>         depends on ARC || ARM || ARM64 || MIPS || COMPILE_TEST
>         help
>           This selects support for the Synopsys DesignWare Mobile Storage IP
> @@ -758,7 +754,6 @@ config MMC_DW_ZX
>
>  config MMC_SH_MMCIF
>         tristate "SuperH Internal MMCIF support"
> -       depends on HAS_DMA
>         depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
>         help
>           This selects the MMC Host Interface controller (MMCIF) found in various
> @@ -878,7 +873,6 @@ config MMC_TOSHIBA_PCI
>  config MMC_BCM2835
>         tristate "Broadcom BCM2835 SDHOST MMC Controller support"
>         depends on ARCH_BCM2835 || COMPILE_TEST
> -       depends on HAS_DMA
>         help
>           This selects the BCM2835 SDHOST MMC controller. If you have
>           a BCM2835 platform with SD or MMC devices, say Y or M here.
> --
> 2.7.4
>
_______________________________________________
devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

[PATCH v2 14/21] mtd: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Drop new dependency of MTD_NAND_MARVELL on HAS_DMA,
  - Split per subsystem.
---
 drivers/mtd/nand/Kconfig    | 8 ++------
 drivers/mtd/spi-nor/Kconfig | 2 +-
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 736ac887303c88ba..55a2f8a2fa90cd87 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -46,7 +46,7 @@ config MTD_NAND_DENALI
 config MTD_NAND_DENALI_PCI
         tristate "Support Denali NAND controller on Intel Moorestown"
 	select MTD_NAND_DENALI
-	depends on HAS_DMA && PCI
+	depends on PCI
         help
           Enable the driver for NAND flash on Intel Moorestown, using the
           Denali NAND controller core.
@@ -184,7 +184,6 @@ config MTD_NAND_S3C2410_CLKSTOP
 config MTD_NAND_TANGO
 	tristate "NAND Flash support for Tango chips"
 	depends on ARCH_TANGO || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Enables the NAND Flash controller on Tango chips.
 
@@ -328,7 +327,7 @@ config MTD_NAND_MARVELL
 	tristate "NAND controller support on Marvell boards"
 	depends on PXA3xx || ARCH_MMP || PLAT_ORION || ARCH_MVEBU || \
 		   COMPILE_TEST
-	depends on HAS_IOMEM && HAS_DMA
+	depends on HAS_IOMEM
 	help
 	  This enables the NAND flash controller driver for Marvell boards,
 	  including:
@@ -490,7 +489,6 @@ config MTD_NAND_SH_FLCTL
 	tristate "Support for NAND on Renesas SuperH FLCTL"
 	depends on SUPERH || COMPILE_TEST
 	depends on HAS_IOMEM
-	depends on HAS_DMA
 	help
 	  Several Renesas SuperH CPU has FLCTL. This option enables support
 	  for NAND Flash using FLCTL.
@@ -558,7 +556,6 @@ config MTD_NAND_SUNXI
 config MTD_NAND_HISI504
 	tristate "Support for NAND controller on Hisilicon SoC Hip04"
 	depends on ARCH_HISI || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Enables support for NAND controller on Hisilicon SoC Hip04.
 
@@ -572,7 +569,6 @@ config MTD_NAND_QCOM
 config MTD_NAND_MTK
 	tristate "Support for NAND controller on MTK SoCs"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  Enables support for NAND controller on MTK SoCs.
 	  This controller is found on mt27xx, mt81xx, mt65xx SoCs.
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index 89da88e591215db1..c493b8230a38c059 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -71,7 +71,7 @@ config SPI_FSL_QUADSPI
 config SPI_HISI_SFC
 	tristate "Hisilicon SPI-NOR Flash Controller(SFC)"
 	depends on ARCH_HISI || COMPILE_TEST
-	depends on HAS_IOMEM && HAS_DMA
+	depends on HAS_IOMEM
 	help
 	  This enables support for hisilicon SPI-NOR flash controller.
 
-- 
2.7.4

Re: [PATCH v2 14/21] mtd: Remove depends on HAS_DMA in case of platform dependency

[Boris Brezillon]

Hi Geert,

On Fri, 16 Mar 2018 14:51:47 +0100
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 

Don't know which release you're targeting but it's likely to conflict
with the change I have in my nand/next branch. Is this a problem if I
take this patch through the mtd tree after [1] has reached Linus' tree?

Regards,

Boris

[1]https://lkml.org/lkml/2018/3/16/435

> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Drop new dependency of MTD_NAND_MARVELL on HAS_DMA,
>   - Split per subsystem.
> ---
>  drivers/mtd/nand/Kconfig    | 8 ++------
>  drivers/mtd/spi-nor/Kconfig | 2 +-
>  2 files changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> index 736ac887303c88ba..55a2f8a2fa90cd87 100644
> --- a/drivers/mtd/nand/Kconfig
> +++ b/drivers/mtd/nand/Kconfig
> @@ -46,7 +46,7 @@ config MTD_NAND_DENALI
>  config MTD_NAND_DENALI_PCI
>          tristate "Support Denali NAND controller on Intel Moorestown"
>  	select MTD_NAND_DENALI
> -	depends on HAS_DMA && PCI
> +	depends on PCI
>          help
>            Enable the driver for NAND flash on Intel Moorestown, using the
>            Denali NAND controller core.
> @@ -184,7 +184,6 @@ config MTD_NAND_S3C2410_CLKSTOP
>  config MTD_NAND_TANGO
>  	tristate "NAND Flash support for Tango chips"
>  	depends on ARCH_TANGO || COMPILE_TEST
> -	depends on HAS_DMA
>  	help
>  	  Enables the NAND Flash controller on Tango chips.
>  
> @@ -328,7 +327,7 @@ config MTD_NAND_MARVELL
>  	tristate "NAND controller support on Marvell boards"
>  	depends on PXA3xx || ARCH_MMP || PLAT_ORION || ARCH_MVEBU || \
>  		   COMPILE_TEST
> -	depends on HAS_IOMEM && HAS_DMA
> +	depends on HAS_IOMEM
>  	help
>  	  This enables the NAND flash controller driver for Marvell boards,
>  	  including:
> @@ -490,7 +489,6 @@ config MTD_NAND_SH_FLCTL
>  	tristate "Support for NAND on Renesas SuperH FLCTL"
>  	depends on SUPERH || COMPILE_TEST
>  	depends on HAS_IOMEM
> -	depends on HAS_DMA
>  	help
>  	  Several Renesas SuperH CPU has FLCTL. This option enables support
>  	  for NAND Flash using FLCTL.
> @@ -558,7 +556,6 @@ config MTD_NAND_SUNXI
>  config MTD_NAND_HISI504
>  	tristate "Support for NAND controller on Hisilicon SoC Hip04"
>  	depends on ARCH_HISI || COMPILE_TEST
> -	depends on HAS_DMA
>  	help
>  	  Enables support for NAND controller on Hisilicon SoC Hip04.
>  
> @@ -572,7 +569,6 @@ config MTD_NAND_QCOM
>  config MTD_NAND_MTK
>  	tristate "Support for NAND controller on MTK SoCs"
>  	depends on ARCH_MEDIATEK || COMPILE_TEST
> -	depends on HAS_DMA
>  	help
>  	  Enables support for NAND controller on MTK SoCs.
>  	  This controller is found on mt27xx, mt81xx, mt65xx SoCs.
> diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
> index 89da88e591215db1..c493b8230a38c059 100644
> --- a/drivers/mtd/spi-nor/Kconfig
> +++ b/drivers/mtd/spi-nor/Kconfig
> @@ -71,7 +71,7 @@ config SPI_FSL_QUADSPI
>  config SPI_HISI_SFC
>  	tristate "Hisilicon SPI-NOR Flash Controller(SFC)"
>  	depends on ARCH_HISI || COMPILE_TEST
> -	depends on HAS_IOMEM && HAS_DMA
> +	depends on HAS_IOMEM
>  	help
>  	  This enables support for hisilicon SPI-NOR flash controller.
>  



-- 
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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Re: [PATCH v2 14/21] mtd: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Hi Boris,

On Sun, Mar 18, 2018 at 11:04 PM, Boris Brezillon
<boris.brezillon@bootlin.com> wrote:
> On Fri, 16 Mar 2018 14:51:47 +0100
> Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
>> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
>> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
>> In most cases this other symbol is an architecture or platform specific
>> symbol, or PCI.
>>
>> Generic symbols and drivers without platform dependencies keep their
>> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
>> cannot work anyway.
>>
>> This simplifies the dependencies, and allows to improve compile-testing.
>>
>
> Don't know which release you're targeting but it's likely to conflict
> with the change I have in my nand/next branch. Is this a problem if I
> take this patch through the mtd tree after [1] has reached Linus' tree?

No problem, I will rebase and resubmit after v4.17-rc1.

> [1]https://lkml.org/lkml/2018/3/16/435
>
>> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Reviewed-by: Mark Brown <broonie@kernel.org>
>> Acked-by: Robin Murphy <robin.murphy@arm.com>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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[PATCH v2 15/21] net: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Note:
  - FSL_FMAN keeps its dependency on HAS_DMA, as it calls set_dma_ops().
    set_dma_ops() does not exist if NO_DMA=y, and its use in this driver
    is questionable.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/net/ethernet/amd/Kconfig                | 2 +-
 drivers/net/ethernet/apm/xgene-v2/Kconfig       | 1 -
 drivers/net/ethernet/apm/xgene/Kconfig          | 1 -
 drivers/net/ethernet/arc/Kconfig                | 6 ++++--
 drivers/net/ethernet/broadcom/Kconfig           | 2 --
 drivers/net/ethernet/calxeda/Kconfig            | 2 +-
 drivers/net/ethernet/hisilicon/Kconfig          | 2 +-
 drivers/net/ethernet/marvell/Kconfig            | 8 +++-----
 drivers/net/ethernet/mellanox/mlxsw/Kconfig     | 2 +-
 drivers/net/ethernet/renesas/Kconfig            | 2 --
 drivers/net/wireless/broadcom/brcm80211/Kconfig | 1 -
 drivers/net/wireless/quantenna/qtnfmac/Kconfig  | 2 +-
 12 files changed, 12 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index d5c15e8bb3de706b..f273af136fc7c995 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -173,7 +173,7 @@ config SUNLANCE
 
 config AMD_XGBE
 	tristate "AMD 10GbE Ethernet driver"
-	depends on ((OF_NET && OF_ADDRESS) || ACPI || PCI) && HAS_IOMEM && HAS_DMA
+	depends on ((OF_NET && OF_ADDRESS) || ACPI || PCI) && HAS_IOMEM
 	depends on X86 || ARM64 || COMPILE_TEST
 	select BITREVERSE
 	select CRC32
diff --git a/drivers/net/ethernet/apm/xgene-v2/Kconfig b/drivers/net/ethernet/apm/xgene-v2/Kconfig
index 1205861b631896a0..eedd3f3dd22e2201 100644
--- a/drivers/net/ethernet/apm/xgene-v2/Kconfig
+++ b/drivers/net/ethernet/apm/xgene-v2/Kconfig
@@ -1,6 +1,5 @@
 config NET_XGENE_V2
 	tristate "APM X-Gene SoC Ethernet-v2 Driver"
-	depends on HAS_DMA
 	depends on ARCH_XGENE || COMPILE_TEST
 	help
 	  This is the Ethernet driver for the on-chip ethernet interface
diff --git a/drivers/net/ethernet/apm/xgene/Kconfig b/drivers/net/ethernet/apm/xgene/Kconfig
index afccb033177b3923..e4e33c900b577161 100644
--- a/drivers/net/ethernet/apm/xgene/Kconfig
+++ b/drivers/net/ethernet/apm/xgene/Kconfig
@@ -1,6 +1,5 @@
 config NET_XGENE
 	tristate "APM X-Gene SoC Ethernet Driver"
-	depends on HAS_DMA
 	depends on ARCH_XGENE || COMPILE_TEST
 	select PHYLIB
 	select MDIO_XGENE
diff --git a/drivers/net/ethernet/arc/Kconfig b/drivers/net/ethernet/arc/Kconfig
index e743ddf46343302f..5d0ab8e74b680cc6 100644
--- a/drivers/net/ethernet/arc/Kconfig
+++ b/drivers/net/ethernet/arc/Kconfig
@@ -24,7 +24,8 @@ config ARC_EMAC_CORE
 config ARC_EMAC
 	tristate "ARC EMAC support"
 	select ARC_EMAC_CORE
-	depends on OF_IRQ && OF_NET && HAS_DMA && (ARC || COMPILE_TEST)
+	depends on OF_IRQ && OF_NET
+	depends on ARC || COMPILE_TEST
 	---help---
 	  On some legacy ARC (Synopsys) FPGA boards such as ARCAngel4/ML50x
 	  non-standard on-chip ethernet device ARC EMAC 10/100 is used.
@@ -33,7 +34,8 @@ config ARC_EMAC
 config EMAC_ROCKCHIP
 	tristate "Rockchip EMAC support"
 	select ARC_EMAC_CORE
-	depends on OF_IRQ && OF_NET && REGULATOR && HAS_DMA && (ARCH_ROCKCHIP || COMPILE_TEST)
+	depends on OF_IRQ && OF_NET && REGULATOR
+	depends on ARCH_ROCKCHIP || COMPILE_TEST
 	---help---
 	  Support for Rockchip RK3036/RK3066/RK3188 EMAC ethernet controllers.
 	  This selects Rockchip SoC glue layer support for the
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index af75156919edfead..4c3bfde6e8de00f2 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -157,7 +157,6 @@ config BGMAC
 config BGMAC_BCMA
 	tristate "Broadcom iProc GBit BCMA support"
 	depends on BCMA && BCMA_HOST_SOC
-	depends on HAS_DMA
 	depends on BCM47XX || ARCH_BCM_5301X || COMPILE_TEST
 	select BGMAC
 	select PHYLIB
@@ -170,7 +169,6 @@ config BGMAC_BCMA
 
 config BGMAC_PLATFORM
 	tristate "Broadcom iProc GBit platform support"
-	depends on HAS_DMA
 	depends on ARCH_BCM_IPROC || COMPILE_TEST
 	depends on OF
 	select BGMAC
diff --git a/drivers/net/ethernet/calxeda/Kconfig b/drivers/net/ethernet/calxeda/Kconfig
index 07d2201530d26c85..9fdd496b90ff47cb 100644
--- a/drivers/net/ethernet/calxeda/Kconfig
+++ b/drivers/net/ethernet/calxeda/Kconfig
@@ -1,6 +1,6 @@
 config NET_CALXEDA_XGMAC
 	tristate "Calxeda 1G/10G XGMAC Ethernet driver"
-	depends on HAS_IOMEM && HAS_DMA
+	depends on HAS_IOMEM
 	depends on ARCH_HIGHBANK || COMPILE_TEST
 	select CRC32
 	help
diff --git a/drivers/net/ethernet/hisilicon/Kconfig b/drivers/net/ethernet/hisilicon/Kconfig
index 8bcf470ff5f38a4e..fb1a7251f45d3369 100644
--- a/drivers/net/ethernet/hisilicon/Kconfig
+++ b/drivers/net/ethernet/hisilicon/Kconfig
@@ -5,7 +5,7 @@
 config NET_VENDOR_HISILICON
 	bool "Hisilicon devices"
 	default y
-	depends on (OF || ACPI) && HAS_DMA
+	depends on OF || ACPI
 	depends on ARM || ARM64 || COMPILE_TEST
 	---help---
 	  If you have a network (Ethernet) card belonging to this class, say Y.
diff --git a/drivers/net/ethernet/marvell/Kconfig b/drivers/net/ethernet/marvell/Kconfig
index ebe5c91489355c9e..0704a1900bbca444 100644
--- a/drivers/net/ethernet/marvell/Kconfig
+++ b/drivers/net/ethernet/marvell/Kconfig
@@ -18,8 +18,8 @@ if NET_VENDOR_MARVELL
 
 config MV643XX_ETH
 	tristate "Marvell Discovery (643XX) and Orion ethernet support"
-	depends on (MV64X60 || PPC32 || PLAT_ORION || COMPILE_TEST) && INET
-	depends on HAS_DMA
+	depends on MV64X60 || PPC32 || PLAT_ORION || COMPILE_TEST
+	depends on INET
 	select PHYLIB
 	select MVMDIO
 	---help---
@@ -58,7 +58,6 @@ config MVNETA_BM_ENABLE
 config MVNETA
 	tristate "Marvell Armada 370/38x/XP/37xx network interface support"
 	depends on ARCH_MVEBU || COMPILE_TEST
-	depends on HAS_DMA
 	select MVMDIO
 	select PHYLINK
 	---help---
@@ -84,7 +83,6 @@ config MVNETA_BM
 config MVPP2
 	tristate "Marvell Armada 375/7K/8K network interface support"
 	depends on ARCH_MVEBU || COMPILE_TEST
-	depends on HAS_DMA
 	select MVMDIO
 	---help---
 	  This driver supports the network interface units in the
@@ -92,7 +90,7 @@ config MVPP2
 
 config PXA168_ETH
 	tristate "Marvell pxa168 ethernet support"
-	depends on HAS_IOMEM && HAS_DMA
+	depends on HAS_IOMEM
 	depends on CPU_PXA168 || ARCH_BERLIN || COMPILE_TEST
 	select PHYLIB
 	---help---
diff --git a/drivers/net/ethernet/mellanox/mlxsw/Kconfig b/drivers/net/ethernet/mellanox/mlxsw/Kconfig
index d56eea3105090051..b591c8cc9896ccb7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlxsw/Kconfig
@@ -30,7 +30,7 @@ config MLXSW_CORE_THERMAL
 
 config MLXSW_PCI
 	tristate "PCI bus implementation for Mellanox Technologies Switch ASICs"
-	depends on PCI && HAS_DMA && HAS_IOMEM && MLXSW_CORE
+	depends on PCI && HAS_IOMEM && MLXSW_CORE
 	default m
 	---help---
 	  This is PCI bus implementation for Mellanox Technologies Switch ASICs.
diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig
index 27be51f0a421b43e..f3f7477043ce1061 100644
--- a/drivers/net/ethernet/renesas/Kconfig
+++ b/drivers/net/ethernet/renesas/Kconfig
@@ -17,7 +17,6 @@ if NET_VENDOR_RENESAS
 
 config SH_ETH
 	tristate "Renesas SuperH Ethernet support"
-	depends on HAS_DMA
 	depends on ARCH_RENESAS || SUPERH || COMPILE_TEST
 	select CRC32
 	select MII
@@ -31,7 +30,6 @@ config SH_ETH
 
 config RAVB
 	tristate "Renesas Ethernet AVB support"
-	depends on HAS_DMA
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select CRC32
 	select MII
diff --git a/drivers/net/wireless/broadcom/brcm80211/Kconfig b/drivers/net/wireless/broadcom/brcm80211/Kconfig
index 9d99eb42d9176f0f..6acba67bca07abd7 100644
--- a/drivers/net/wireless/broadcom/brcm80211/Kconfig
+++ b/drivers/net/wireless/broadcom/brcm80211/Kconfig
@@ -60,7 +60,6 @@ config BRCMFMAC_PCIE
 	bool "PCIE bus interface support for FullMAC driver"
 	depends on BRCMFMAC
 	depends on PCI
-	depends on HAS_DMA
 	select BRCMFMAC_PROTO_MSGBUF
 	select FW_LOADER
 	---help---
diff --git a/drivers/net/wireless/quantenna/qtnfmac/Kconfig b/drivers/net/wireless/quantenna/qtnfmac/Kconfig
index 025fa6018550895a..8d1492a90bd135c0 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/Kconfig
+++ b/drivers/net/wireless/quantenna/qtnfmac/Kconfig
@@ -7,7 +7,7 @@ config QTNFMAC
 config QTNFMAC_PEARL_PCIE
 	tristate "Quantenna QSR10g PCIe support"
 	default n
-	depends on HAS_DMA && PCI && CFG80211
+	depends on PCI && CFG80211
 	select QTNFMAC
 	select FW_LOADER
 	select CRC32
-- 
2.7.4

[PATCH v2 16/21] remoteproc: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/remoteproc/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index b609e1d3654ba65f..b60d8132113de0f7 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -23,7 +23,6 @@ config IMX_REMOTEPROC
 
 config OMAP_REMOTEPROC
 	tristate "OMAP remoteproc support"
-	depends on HAS_DMA
 	depends on ARCH_OMAP4 || SOC_OMAP5
 	depends on OMAP_IOMMU
 	select MAILBOX
-- 
2.7.4

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Re: [PATCH v2 16/21] remoteproc: Remove depends on HAS_DMA in case of platform dependency

[Bjorn Andersson]

On Fri 16 Mar 06:51 PDT 2018, Geert Uytterhoeven wrote:

> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
> v2:
>   - Add Reviewed-by, Acked-by,
>   - Drop RFC state,
>   - Split per subsystem.
> ---
>  drivers/remoteproc/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index b609e1d3654ba65f..b60d8132113de0f7 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -23,7 +23,6 @@ config IMX_REMOTEPROC
>  
>  config OMAP_REMOTEPROC
>  	tristate "OMAP remoteproc support"
> -	depends on HAS_DMA
>  	depends on ARCH_OMAP4 || SOC_OMAP5
>  	depends on OMAP_IOMMU
>  	select MAILBOX
> -- 
> 2.7.4
> 

[PATCH v2 17/21] scsi: hisi_sas: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/scsi/hisi_sas/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/hisi_sas/Kconfig b/drivers/scsi/hisi_sas/Kconfig
index d42f29a5eb65046d..57183fce70fb6355 100644
--- a/drivers/scsi/hisi_sas/Kconfig
+++ b/drivers/scsi/hisi_sas/Kconfig
@@ -1,6 +1,6 @@
 config SCSI_HISI_SAS
 	tristate "HiSilicon SAS"
-	depends on HAS_DMA && HAS_IOMEM
+	depends on HAS_IOMEM
 	depends on ARM64 || COMPILE_TEST
 	select SCSI_SAS_LIBSAS
 	select BLK_DEV_INTEGRITY
-- 
2.7.4

Re: [PATCH v2 17/21] scsi: hisi_sas: Remove depends on HAS_DMA in case of platform dependency

[John Garry]

On 16/03/2018 13:51, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
>
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
>
> This simplifies the dependencies, and allows to improve compile-testing.
>
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: John Garry <john.garry@huawei.com>


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[PATCH v2 18/21] serial: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/tty/serial/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 3682fd3e960cbd64..a0ea146a2ef5af53 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -115,7 +115,6 @@ config SERIAL_SB1250_DUART_CONSOLE
 
 config SERIAL_ATMEL
 	bool "AT91 on-chip serial port support"
-	depends on HAS_DMA
 	depends on ARCH_AT91 || COMPILE_TEST
 	select SERIAL_CORE
 	select SERIAL_MCTRL_GPIO if GPIOLIB
@@ -586,7 +585,6 @@ config BFIN_UART3_CTSRTS
 
 config SERIAL_IMX
 	tristate "IMX serial port support"
-	depends on HAS_DMA
 	depends on ARCH_MXC || COMPILE_TEST
 	select SERIAL_CORE
 	select RATIONAL
@@ -1436,7 +1434,6 @@ config SERIAL_PCH_UART_CONSOLE
 
 config SERIAL_MXS_AUART
 	tristate "MXS AUART support"
-	depends on HAS_DMA
 	depends on ARCH_MXS || MACH_ASM9260 || COMPILE_TEST
 	select SERIAL_CORE
 	select SERIAL_MCTRL_GPIO if GPIOLIB
@@ -1656,7 +1653,6 @@ config SERIAL_SPRD_CONSOLE
 config SERIAL_STM32
 	tristate "STMicroelectronics STM32 serial port support"
 	select SERIAL_CORE
-	depends on HAS_DMA
 	depends on ARCH_STM32 || COMPILE_TEST
 	help
 	  This driver is for the on-chip Serial Controller on
-- 
2.7.4

Re: [PATCH v2 18/21] serial: Remove depends on HAS_DMA in case of platform dependency

[Greg Kroah-Hartman]

On Fri, Mar 16, 2018 at 02:51:51PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
_______________________________________________
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[PATCH v2 19/21] spi: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/spi/Kconfig | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 603783976b8152d4..7bd3a94f58511c41 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -71,7 +71,6 @@ config SPI_ARMADA_3700
 
 config SPI_ATMEL
 	tristate "Atmel SPI Controller"
-	depends on HAS_DMA
 	depends on (ARCH_AT91 || AVR32 || COMPILE_TEST)
 	help
 	  This selects a driver for the Atmel SPI Controller, present on
@@ -252,7 +251,6 @@ config SPI_EFM32
 
 config SPI_EP93XX
 	tristate "Cirrus Logic EP93xx SPI controller"
-	depends on HAS_DMA
 	depends on ARCH_EP93XX || COMPILE_TEST
 	help
 	  This enables using the Cirrus EP93xx SPI controller in master
@@ -374,7 +372,6 @@ config SPI_FSL_SPI
 config SPI_FSL_DSPI
 	tristate "Freescale DSPI controller"
 	select REGMAP_MMIO
-	depends on HAS_DMA
 	depends on SOC_VF610 || SOC_LS1021A || ARCH_LAYERSCAPE || M5441x || COMPILE_TEST
 	help
 	  This enables support for the Freescale DSPI controller in master
@@ -450,7 +447,6 @@ config SPI_OMAP_UWIRE
 
 config SPI_OMAP24XX
 	tristate "McSPI driver for OMAP"
-	depends on HAS_DMA
 	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	select SG_SPLIT
 	help
@@ -459,7 +455,6 @@ config SPI_OMAP24XX
 
 config SPI_TI_QSPI
 	tristate "DRA7xxx QSPI controller support"
-	depends on HAS_DMA
 	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	help
 	  QSPI master controller for DRA7xxx used for flash devices.
@@ -488,7 +483,6 @@ config SPI_PIC32
 config SPI_PIC32_SQI
 	tristate "Microchip PIC32 Quad SPI driver"
 	depends on MACH_PIC32 || COMPILE_TEST
-	depends on HAS_DMA
 	help
 	  SPI driver for PIC32 Quad SPI controller.
 
@@ -591,7 +585,7 @@ config SPI_SC18IS602
 
 config SPI_SH_MSIOF
 	tristate "SuperH MSIOF SPI controller"
-	depends on HAVE_CLK && HAS_DMA
+	depends on HAVE_CLK
 	depends on ARCH_SHMOBILE || ARCH_RENESAS || COMPILE_TEST
 	help
 	  SPI driver for SuperH and SH Mobile MSIOF blocks.
@@ -669,7 +663,7 @@ config SPI_MXS
 config SPI_TEGRA114
 	tristate "NVIDIA Tegra114 SPI Controller"
 	depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
-	depends on RESET_CONTROLLER && HAS_DMA
+	depends on RESET_CONTROLLER
 	help
 	  SPI driver for NVIDIA Tegra114 SPI Controller interface. This controller
 	  is different than the older SoCs SPI controller and also register interface
@@ -687,7 +681,7 @@ config SPI_TEGRA20_SFLASH
 config SPI_TEGRA20_SLINK
 	tristate "Nvidia Tegra20/Tegra30 SLINK Controller"
 	depends on (ARCH_TEGRA && TEGRA20_APB_DMA) || COMPILE_TEST
-	depends on RESET_CONTROLLER && HAS_DMA
+	depends on RESET_CONTROLLER
 	help
 	  SPI driver for Nvidia Tegra20/Tegra30 SLINK Controller interface.
 
-- 
2.7.4

Re: [PATCH v2 19/21] spi: Remove depends on HAS_DMA in case of platform dependency

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 348 bytes --]

On Fri, Mar 16, 2018 at 02:51:52PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.

Acked-by: Mark Brown <broonie@kernel.org>

[-- Attachment #2: signature.asc --]
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[PATCH v2 20/21] staging: vc04_services: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/staging/vc04_services/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/staging/vc04_services/Kconfig b/drivers/staging/vc04_services/Kconfig
index f5aaf7d629f0fae9..98064ce2c2b47c7f 100644
--- a/drivers/staging/vc04_services/Kconfig
+++ b/drivers/staging/vc04_services/Kconfig
@@ -1,6 +1,5 @@
 menuconfig BCM_VIDEOCORE
 	tristate "Broadcom VideoCore support"
-	depends on HAS_DMA
 	depends on OF
 	depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
 	default y
-- 
2.7.4

Re: [PATCH v2 20/21] staging: vc04_services: Remove depends on HAS_DMA in case of platform dependency

[Greg Kroah-Hartman]

On Fri, Mar 16, 2018 at 02:51:53PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
_______________________________________________
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http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

[PATCH v2 21/21] usb: Remove depends on HAS_DMA in case of platform dependency

[Geert Uytterhoeven]

Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.

Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.

This simplifies the dependencies, and allows to improve compile-testing.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> [drivers/usb/gadget/]
---
v2:
  - Add Reviewed-by, Acked-by,
  - Drop RFC state,
  - Split per subsystem.
---
 drivers/usb/gadget/udc/Kconfig | 4 ++--
 drivers/usb/mtu3/Kconfig       | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index 0875d38476ee9395..9c3b4f86965e80c7 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -179,7 +179,7 @@ config USB_R8A66597
 
 config USB_RENESAS_USBHS_UDC
 	tristate 'Renesas USBHS controller'
-	depends on USB_RENESAS_USBHS && HAS_DMA
+	depends on USB_RENESAS_USBHS
 	help
 	   Renesas USBHS is a discrete USB host and peripheral controller chip
 	   that supports both full and high speed USB 2.0 data transfers.
@@ -192,7 +192,7 @@ config USB_RENESAS_USBHS_UDC
 config USB_RENESAS_USB3
 	tristate 'Renesas USB3.0 Peripheral controller'
 	depends on ARCH_RENESAS || COMPILE_TEST
-	depends on EXTCON && HAS_DMA
+	depends on EXTCON
 	help
 	   Renesas USB3.0 Peripheral controller is a USB peripheral controller
 	   that supports super, high, and full speed USB 3.0 data transfers.
diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig
index 25cd61947beea51e..c0c0eb88e5eafc74 100644
--- a/drivers/usb/mtu3/Kconfig
+++ b/drivers/usb/mtu3/Kconfig
@@ -2,7 +2,7 @@
 
 config USB_MTU3
 	tristate "MediaTek USB3 Dual Role controller"
-	depends on EXTCON && (USB || USB_GADGET) && HAS_DMA
+	depends on EXTCON && (USB || USB_GADGET)
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD
 	help
-- 
2.7.4

Re: [PATCH v2 21/21] usb: Remove depends on HAS_DMA in case of platform dependency

[Greg Kroah-Hartman]

On Fri, Mar 16, 2018 at 02:51:54PM +0100, Geert Uytterhoeven wrote:
> Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
> symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
> In most cases this other symbol is an architecture or platform specific
> symbol, or PCI.
> 
> Generic symbols and drivers without platform dependencies keep their
> dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
> cannot work anyway.
> 
> This simplifies the dependencies, and allows to improve compile-testing.
> 
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reviewed-by: Mark Brown <broonie@kernel.org>
> Acked-by: Robin Murphy <robin.murphy@arm.com>
> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> [drivers/usb/gadget/]

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Herbert Xu]

On Fri, Mar 16, 2018 at 02:51:33PM +0100, Geert Uytterhoeven wrote:
>
> This patch series:
>   - Removes dependencies on HAS_DMA for symbols that already have
>     platform dependencies implying HAS_DMA.
> 
> To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
> this (drivers) series should be applied after the previous (core)
> series (but not many people may notice/care ;-)
> 
> Changes compared to v1:
>   - Add Reviewed-by, Acked-by,
>   - Drop dependency of SND_SOC_LPASS_IPQ806X on HAS_DMA,
>   - Drop dependency of VIDEOBUF{,2}_DMA_{CONTIG,SG} on HAS_DMA,
>   - Drop new dependencies of VIDEO_IPU3_CIO2, DVB_C8SECTPFE, and
>     MTD_NAND_MARVELL on HAS_DMA,
>   - Split in per-subsystem patches,
>   - Split-off the core part in a separate series.
> 
> This series is against v4.16-rc5. It can also be found at
> https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git/log/?h=no-dma-compile-testing-v2
> 
> It has been compile-tested with allmodconfig and allyesconfig for
> m68k/sun3, and has received attention from the kbuild test robot.

Do these patches have any dependencies? Can they be applied directly
in a subsystem tree?

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Geert Uytterhoeven]

Hi Herbert,

On Fri, Mar 16, 2018 at 4:14 PM, Herbert Xu <herbert@gondor.apana.org.au> wrote:
> On Fri, Mar 16, 2018 at 02:51:33PM +0100, Geert Uytterhoeven wrote:
>> This patch series:
>>   - Removes dependencies on HAS_DMA for symbols that already have
>>     platform dependencies implying HAS_DMA.
>>
>> To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
>> this (drivers) series should be applied after the previous (core)
>> series (but not many people may notice/care ;-)
>>
>> Changes compared to v1:
>>   - Add Reviewed-by, Acked-by,
>>   - Drop dependency of SND_SOC_LPASS_IPQ806X on HAS_DMA,
>>   - Drop dependency of VIDEOBUF{,2}_DMA_{CONTIG,SG} on HAS_DMA,
>>   - Drop new dependencies of VIDEO_IPU3_CIO2, DVB_C8SECTPFE, and
>>     MTD_NAND_MARVELL on HAS_DMA,
>>   - Split in per-subsystem patches,
>>   - Split-off the core part in a separate series.
>>
>> This series is against v4.16-rc5. It can also be found at
>> https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git/log/?h=no-dma-compile-testing-v2
>>
>> It has been compile-tested with allmodconfig and allyesconfig for
>> m68k/sun3, and has received attention from the kbuild test robot.
>
> Do these patches have any dependencies? Can they be applied directly
> in a subsystem tree?

| To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
| this (drivers) series should be applied after the previous (core)
| series (but not many people may notice/care ;-)

Apart from introducing build failures in allmodconfig/allyesconfig builds on
(uncommon) NO_DMA=y platforms, they can be applied directly and individually.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Herbert Xu]

On Fri, Mar 16, 2018 at 04:41:57PM +0100, Geert Uytterhoeven wrote:
>
> | To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
> | this (drivers) series should be applied after the previous (core)
> | series (but not many people may notice/care ;-)

Oops, didn't notice it :)

> Apart from introducing build failures in allmodconfig/allyesconfig builds on
> (uncommon) NO_DMA=y platforms, they can be applied directly and individually.

I think I'll leave this with you then.

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 387 bytes --]


> To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
> this (drivers) series should be applied after the previous (core)
> series (but not many people may notice/care ;-)

I still don't get if there is a dependency on the core patches. I.e.
shall I apply the subsystem patch now by myself or do you want to push
the series after the core patch and need my ack here?


[-- Attachment #2: signature.asc --]
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Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Geert Uytterhoeven]

Hi Wolfram,

On Fri, Mar 16, 2018 at 10:23 PM, Wolfram Sang <wsa@the-dreams.de> wrote:
>> To avoid allmodconfig/allyesconfig regressions on NO_DMA=y platforms,
>> this (drivers) series should be applied after the previous (core)
>> series (but not many people may notice/care ;-)
>
> I still don't get if there is a dependency on the core patches. I.e.
> shall I apply the subsystem patch now by myself or do you want to push
> the series after the core patch and need my ack here?

Yes, there is a dependency. Without the core patches, enabling COMPILE_TEST,
and compile-testing drivers irrelevant on obscure NO_DMA=y platforms will
cause build failures.

To play it safe, you want to postpone the subsystem patches until the core
part has landed upstream. I will rebase and resubmit after v4.17-rc1.

Thanks, and sorry for being unclear.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
_______________________________________________
devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 247 bytes --]


> To play it safe, you want to postpone the subsystem patches until the core
> part has landed upstream. I will rebase and resubmit after v4.17-rc1.

Thanks for the heads up. I'll wait for the rebased patch then and apply
it after rc1 for 4.17.


[-- Attachment #2: signature.asc --]
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Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Rob Herring]

On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
>         Hi all,
>
> If NO_DMA=y, get_dma_ops() returns a reference to the non-existing
> symbol bad_dma_ops, thus causing a link failure if it is ever used.
>
> The intention of this is twofold:
>   1. To catch users of the DMA API on systems that do no support the DMA
>      mapping API,
>   2. To avoid building drivers that cannot work on such systems anyway.
>
> However, the disadvantage is that we have to keep on adding dependencies
> on HAS_DMA all over the place.
>
> Thanks to the COMPILE_TEST symbol, lots of drivers now depend on one or
> more platform dependencies (that imply HAS_DMA) || COMPILE_TEST, thus
> already covering intention #2.  Having to add an explicit dependency on
> HAS_DMA here is cumbersome, and hinders compile-testing.

The same can be said for CONFIG_IOMEM and CONFIG_OF. Any plans to
remove those too? CONFIG_IOMEM is mostly just a !CONFIG_UM option.

Rob
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Re: [PATCH v2 00/21] Allow compile-testing NO_DMA (drivers)

[Geert Uytterhoeven]

Hi Rob,

On Thu, Apr 5, 2018 at 2:32 AM, Rob Herring <robherring2@gmail.com> wrote:
> On Fri, Mar 16, 2018 at 8:51 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
>> If NO_DMA=y, get_dma_ops() returns a reference to the non-existing
>> symbol bad_dma_ops, thus causing a link failure if it is ever used.
>>
>> The intention of this is twofold:
>>   1. To catch users of the DMA API on systems that do no support the DMA
>>      mapping API,
>>   2. To avoid building drivers that cannot work on such systems anyway.
>>
>> However, the disadvantage is that we have to keep on adding dependencies
>> on HAS_DMA all over the place.
>>
>> Thanks to the COMPILE_TEST symbol, lots of drivers now depend on one or
>> more platform dependencies (that imply HAS_DMA) || COMPILE_TEST, thus
>> already covering intention #2.  Having to add an explicit dependency on
>> HAS_DMA here is cumbersome, and hinders compile-testing.
>
> The same can be said for CONFIG_IOMEM and CONFIG_OF. Any plans to
> remove those too? CONFIG_IOMEM is mostly just a !CONFIG_UM option.

Perhaps, if time permits...

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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