[PATCH V3 00/29] bitops: add parity functions

[PATCH V3 00/29] bitops: add parity functions

[zengzhaoxiu]

From: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

When I do "grep parity -r linux", I found many parity calculations
distributed in many drivers.

This patch series does:
  1. provide generic and architecture-specific parity calculations
  2. remove drivers' local parity calculations, use bitops' parity
     functions instead
  3. replace "hweightN(x) & 1" with "parityN(x)" to improve readability,
     and improve performance on some CPUs that without popcount support

I did not use GCC's __builtin_parity* functions, based on the following reasons:
  1. I don't know where to identify which version of GCC from the beginning
     supported __builtin_parity for the architecture.
  2. For the architecture that doesn't has popcount instruction, GCC instead use
     "call __paritysi2" (__paritydi2 for 64-bits). So if use __builtin_parity, we must
     provide __paritysi2 and __paritydi2 functions for these architectures.
     Additionally, parity4,8,16 might be "__builtin_parity(x & mask)", but the "& mask"
     operation is totally unnecessary.
  3. For the architecture that has popcount instruction, we do the same things.
  4. For powerpc, sparc, and x86, we do runtime patching to use popcount instruction
     if the CPU support.

I have compiled successfully with x86_64_defconfig, i386_defconfig, pseries_defconfig
and sparc64_defconfig.

Changes to v2:
- Add constant PARITY_MAGIC (proposals by Sam Ravnborg)
- Add include/asm-generic/bitops/popc-parity.h (proposals by Chris Metcalf)
- Tile uses popc-parity.h directly
- Mips uses popc-parity.h if has usable __builtin_popcount
- Add few comments in powerpc's and sparc's parity.S
- X86, remove custom calling convention

Changes to v1:
- Add runtime patching for powerpc, sparc, and x86
- Avr32 use grenric parity too
- Fix error in ssfdc's patch, and add commit message
- Don't change the original code composition of drivers/iio/gyro/adxrs450.c
- Directly assignement to phy_cap.parity in drivers/scsi/isci/phy.c

Regards,

=== diffstat ===

Zhaoxiu Zeng (29):
  bitops: add parity functions
  Include generic parity.h in some architectures' bitops.h
  Add alpha-specific parity functions
  Add blackfin-specific parity functions
  Add ia64-specific parity functions
  Tile and MIPS (if has usable __builtin_popcount) use popcount parity
    functions
  Add powerpc-specific parity functions
  Add sparc-specific parity functions
  Add x86-specific parity functions
  sunrpc: use parity8
  mips: use parity functions in cerr-sb1.c
  bch: use parity32
  media: use parity8 in vivid-vbi-gen.c
  media: use parity functions in saa7115
  input: use parity32 in grip_mp
  input: use parity64 in sidewinder
  input: use parity16 in ams_delta_serio
  scsi: use parity32 in isci's phy
  mtd: use parity16 in ssfdc
  mtd: use parity functions in inftlcore
  crypto: use parity functions in qat_hal
  mtd: use parity16 in sm_ftl
  ethernet: use parity8 in sun/niu.c
  input: use parity8 in pcips2
  input: use parity8 in sa1111ps2
  iio: use parity32 in adxrs450
  serial: use parity32 in max3100
  input: use parity8 in elantech
  ethernet: use parity8 in broadcom/tg3.c

 arch/alpha/include/asm/bitops.h              |  27 +++++
 arch/arc/include/asm/bitops.h                |   1 +
 arch/arm/include/asm/bitops.h                |   1 +
 arch/arm64/include/asm/bitops.h              |   1 +
 arch/avr32/include/asm/bitops.h              |   1 +
 arch/blackfin/include/asm/bitops.h           |  31 ++++++
 arch/c6x/include/asm/bitops.h                |   1 +
 arch/cris/include/asm/bitops.h               |   1 +
 arch/frv/include/asm/bitops.h                |   1 +
 arch/h8300/include/asm/bitops.h              |   1 +
 arch/hexagon/include/asm/bitops.h            |   1 +
 arch/ia64/include/asm/bitops.h               |  31 ++++++
 arch/m32r/include/asm/bitops.h               |   1 +
 arch/m68k/include/asm/bitops.h               |   1 +
 arch/metag/include/asm/bitops.h              |   1 +
 arch/mips/include/asm/bitops.h               |   7 ++
 arch/mips/mm/cerr-sb1.c                      |  67 ++++---------
 arch/mn10300/include/asm/bitops.h            |   1 +
 arch/openrisc/include/asm/bitops.h           |   1 +
 arch/parisc/include/asm/bitops.h             |   1 +
 arch/powerpc/include/asm/bitops.h            |  11 +++
 arch/powerpc/lib/Makefile                    |   2 +-
 arch/powerpc/lib/parity_64.S                 | 142 +++++++++++++++++++++++++++
 arch/powerpc/lib/ppc_ksyms.c                 |   5 +
 arch/s390/include/asm/bitops.h               |   1 +
 arch/sh/include/asm/bitops.h                 |   1 +
 arch/sparc/include/asm/bitops_32.h           |   1 +
 arch/sparc/include/asm/bitops_64.h           |  18 ++++
 arch/sparc/kernel/sparc_ksyms_64.c           |   6 ++
 arch/sparc/lib/Makefile                      |   2 +-
 arch/sparc/lib/parity.S                      | 128 ++++++++++++++++++++++++
 arch/tile/include/asm/bitops.h               |   2 +
 arch/x86/include/asm/arch_hweight.h          |   5 +
 arch/x86/include/asm/arch_parity.h           | 117 ++++++++++++++++++++++
 arch/x86/include/asm/bitops.h                |   4 +-
 arch/xtensa/include/asm/bitops.h             |   1 +
 drivers/crypto/qat/qat_common/qat_hal.c      |  32 ++----
 drivers/iio/gyro/adxrs450.c                  |   4 +-
 drivers/input/joystick/grip_mp.c             |  16 +--
 drivers/input/joystick/sidewinder.c          |  24 +----
 drivers/input/mouse/elantech.c               |  10 +-
 drivers/input/mouse/elantech.h               |   1 -
 drivers/input/serio/ams_delta_serio.c        |   8 +-
 drivers/input/serio/pcips2.c                 |   2 +-
 drivers/input/serio/sa1111ps2.c              |   2 +-
 drivers/media/i2c/saa7115.c                  |  17 +---
 drivers/media/platform/vivid/vivid-vbi-gen.c |   9 +-
 drivers/mtd/inftlcore.c                      |  17 +---
 drivers/mtd/sm_ftl.c                         |   5 +-
 drivers/mtd/ssfdc.c                          |  31 ++----
 drivers/net/ethernet/broadcom/tg3.c          |   6 +-
 drivers/net/ethernet/sun/niu.c               |  10 +-
 drivers/scsi/isci/phy.c                      |  15 +--
 drivers/tty/serial/max3100.c                 |   2 +-
 include/asm-generic/bitops.h                 |   1 +
 include/asm-generic/bitops/arch_parity.h     |  39 ++++++++
 include/asm-generic/bitops/const_parity.h    |  36 +++++++
 include/asm-generic/bitops/parity.h          |   7 ++
 include/asm-generic/bitops/popc-parity.h     |  32 ++++++
 include/linux/bitops.h                       |  10 ++
 lib/bch.c                                    |  14 +--
 net/sunrpc/auth_gss/gss_krb5_keys.c          |   6 +-
 62 files changed, 745 insertions(+), 235 deletions(-)
 create mode 100644 arch/powerpc/lib/parity_64.S
 create mode 100644 arch/sparc/lib/parity.S
 create mode 100644 arch/x86/include/asm/arch_parity.h
 create mode 100644 include/asm-generic/bitops/arch_parity.h
 create mode 100644 include/asm-generic/bitops/const_parity.h
 create mode 100644 include/asm-generic/bitops/parity.h
 create mode 100644 include/asm-generic/bitops/popc-parity.h

-- 
2.5.0

[PATCH V3 06/29] Tile and MIPS (if has usable __builtin_popcount) use popcount parity functions

[zengzhaoxiu]

From: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
---
 arch/mips/include/asm/bitops.h | 7 +++++++
 arch/tile/include/asm/bitops.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index ce9666c..4192068 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -626,6 +626,13 @@ static inline int ffs(int word)
 #include <asm/arch_hweight.h>
 #include <asm-generic/bitops/const_hweight.h>
 
+#ifdef ARCH_HAS_USABLE_BUILTIN_POPCOUNT
+#include <asm-generic/bitops/popc-parity.h>
+#else
+#include <asm-generic/bitops/arch_parity.h>
+#endif
+#include <asm-generic/bitops/const_parity.h>
+
 #include <asm-generic/bitops/le.h>
 #include <asm-generic/bitops/ext2-atomic.h>
 
diff --git a/arch/tile/include/asm/bitops.h b/arch/tile/include/asm/bitops.h
index 20caa34..4dd89d8 100644
--- a/arch/tile/include/asm/bitops.h
+++ b/arch/tile/include/asm/bitops.h
@@ -85,6 +85,8 @@ static inline unsigned long __arch_hweight64(__u64 w)
 #include <asm-generic/bitops/builtin-__fls.h>
 #include <asm-generic/bitops/builtin-ffs.h>
 #include <asm-generic/bitops/const_hweight.h>
+#include <asm-generic/bitops/popc-parity.h>
+#include <asm-generic/bitops/const_parity.h>
 #include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/sched.h>
-- 
2.5.0

Re: [PATCH V3 06/29] Tile and MIPS (if has usable __builtin_popcount) use popcount parity functions

[Chris Metcalf]

On 4/13/2016 11:05 PM, zengzhaoxiu@163.com wrote:
> From: Zhaoxiu Zeng<zhaoxiu.zeng@gmail.com>
>
> Signed-off-by: Zhaoxiu Zeng<zhaoxiu.zeng@gmail.com>
> ---
>   arch/mips/include/asm/bitops.h | 7 +++++++
>   arch/tile/include/asm/bitops.h | 2 ++
>   2 files changed, 9 insertions(+)

Acked-by: Chris Metcalf <cmetcalf@mellanox.com> [for tile]

-- 
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com

Re: [PATCH V3 06/29] Tile and MIPS (if has usable __builtin_popcount) use popcount parity functions

[Chris Metcalf]

On 4/13/2016 11:05 PM, zengzhaoxiu@163.com wrote:
> From: Zhaoxiu Zeng<zhaoxiu.zeng@gmail.com>
>
> Signed-off-by: Zhaoxiu Zeng<zhaoxiu.zeng@gmail.com>
> ---
>   arch/mips/include/asm/bitops.h | 7 +++++++
>   arch/tile/include/asm/bitops.h | 2 ++
>   2 files changed, 9 insertions(+)

Acked-by: Chris Metcalf <cmetcalf@mellanox.com> [for tile]

-- 
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com

[PATCH V3 11/29] mips: use parity functions in cerr-sb1.c

[zengzhaoxiu]

From: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
---
 arch/mips/mm/cerr-sb1.c | 67 +++++++++++++------------------------------------
 1 file changed, 17 insertions(+), 50 deletions(-)

diff --git a/arch/mips/mm/cerr-sb1.c b/arch/mips/mm/cerr-sb1.c
index ee5c1ff..2e7d660 100644
--- a/arch/mips/mm/cerr-sb1.c
+++ b/arch/mips/mm/cerr-sb1.c
@@ -264,27 +264,6 @@ asmlinkage void sb1_cache_error(void)
 #endif
 }
 
-
-/* Parity lookup table. */
-static const uint8_t parity[256] = {
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-	0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
-};
-
 /* Masks to select bits for Hamming parity, mask_72_64[i] for bit[i] */
 static const uint64_t mask_72_64[8] = {
 	0x0738C808099264FFULL,
@@ -298,34 +277,28 @@ static const uint64_t mask_72_64[8] = {
 };
 
 /* Calculate the parity on a range of bits */
-static char range_parity(uint64_t dword, int max, int min)
+static inline char range_parity(uint64_t dword, int max, int min)
 {
-	char parity = 0;
-	int i;
-	dword >>= min;
-	for (i=max-min; i>=0; i--) {
-		if (dword & 0x1)
-			parity = !parity;
-		dword >>= 1;
+	int n = max - min + 1;
+	if (__builtin_constant_p(n)) {
+		if (n <= 8)
+			return parity8((unsigned int)(dword >> min) & ((1U << n) - 1));
+		if (n <= 16)
+			return parity16((unsigned int)(dword >> min) & ((1U << n) - 1));
+		if (n <= 32)
+			return parity32((unsigned int)(dword >> min) & ((1U << n) - 1));
 	}
-	return parity;
+	return parity64((dword >> min) & ((1ULL << n) - 1));
 }
 
 /* Calculate the 4-bit even byte-parity for an instruction */
-static unsigned char inst_parity(uint32_t word)
+static inline unsigned char inst_parity(uint32_t word)
 {
-	int i, j;
-	char parity = 0;
-	for (j=0; j<4; j++) {
-		char byte_parity = 0;
-		for (i=0; i<8; i++) {
-			if (word & 0x80000000)
-				byte_parity = !byte_parity;
-			word <<= 1;
-		}
-		parity <<= 1;
-		parity |= byte_parity;
-	}
+	char parity;
+	parity  = parity8(word >> 24) << 3;
+	parity |= parity8(word >> 16) << 2;
+	parity |= parity8(word >> 8) << 1;
+	parity |= parity8(word);
 	return parity;
 }
 
@@ -436,7 +409,6 @@ static uint32_t extract_ic(unsigned short addr, int data)
 static uint8_t dc_ecc(uint64_t dword)
 {
 	uint64_t t;
-	uint32_t w;
 	uint8_t	 p;
 	int	 i;
 
@@ -445,12 +417,7 @@ static uint8_t dc_ecc(uint64_t dword)
 	{
 		p <<= 1;
 		t = dword & mask_72_64[i];
-		w = (uint32_t)(t >> 32);
-		p ^= (parity[w>>24] ^ parity[(w>>16) & 0xFF]
-		      ^ parity[(w>>8) & 0xFF] ^ parity[w & 0xFF]);
-		w = (uint32_t)(t & 0xFFFFFFFF);
-		p ^= (parity[w>>24] ^ parity[(w>>16) & 0xFF]
-		      ^ parity[(w>>8) & 0xFF] ^ parity[w & 0xFF]);
+		p |= parity64(t);
 	}
 	return p;
 }
-- 
2.5.0

[PATCH V3 00/29] bitops: add parity functions

[zengzhaoxiu]

From: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

When I do "grep parity -r linux", I found many parity calculations
distributed in many drivers.

This patch series does:
  1. provide generic and architecture-specific parity calculations
  2. remove drivers' local parity calculations, use bitops' parity
     functions instead
  3. replace "hweightN(x) & 1" with "parityN(x)" to improve readability,
     and improve performance on some CPUs that without popcount support

I did not use GCC's __builtin_parity* functions, based on the following reasons:
  1. I don't know where to identify which version of GCC from the beginning
     supported __builtin_parity for the architecture.
  2. For the architecture that doesn't has popcount instruction, GCC instead use
     "call __paritysi2" (__paritydi2 for 64-bits). So if use __builtin_parity, we must
     provide __paritysi2 and __paritydi2 functions for these architectures.
     Additionally, parity4,8,16 might be "__builtin_parity(x & mask)", but the "& mask"
     operation is totally unnecessary.
  3. For the architecture that has popcount instruction, we do the same things.
  4. For powerpc, sparc, and x86, we do runtime patching to use popcount instruction
     if the CPU support.

I have compiled successfully with x86_64_defconfig, i386_defconfig, pseries_defconfig
and sparc64_defconfig.

Changes to v2:
- Add constant PARITY_MAGIC (proposals by Sam Ravnborg)
- Add include/asm-generic/bitops/popc-parity.h (proposals by Chris Metcalf)
- Tile uses popc-parity.h directly
- Mips uses popc-parity.h if has usable __builtin_popcount
- Add few comments in powerpc's and sparc's parity.S
- X86, remove custom calling convention

Changes to v1:
- Add runtime patching for powerpc, sparc, and x86
- Avr32 use grenric parity too
- Fix error in ssfdc's patch, and add commit message
- Don't change the original code composition of drivers/iio/gyro/adxrs450.c
- Directly assignement to phy_cap.parity in drivers/scsi/isci/phy.c

Regards,

=== diffstat ===

Zhaoxiu Zeng (29):
  bitops: add parity functions
  Include generic parity.h in some architectures' bitops.h
  Add alpha-specific parity functions
  Add blackfin-specific parity functions
  Add ia64-specific parity functions
  Tile and MIPS (if has usable __builtin_popcount) use popcount parity
    functions
  Add powerpc-specific parity functions
  Add sparc-specific parity functions
  Add x86-specific parity functions
  sunrpc: use parity8
  mips: use parity functions in cerr-sb1.c
  bch: use parity32
  media: use parity8 in vivid-vbi-gen.c
  media: use parity functions in saa7115
  input: use parity32 in grip_mp
  input: use parity64 in sidewinder
  input: use parity16 in ams_delta_serio
  scsi: use parity32 in isci's phy
  mtd: use parity16 in ssfdc
  mtd: use parity functions in inftlcore
  crypto: use parity functions in qat_hal
  mtd: use parity16 in sm_ftl
  ethernet: use parity8 in sun/niu.c
  input: use parity8 in pcips2
  input: use parity8 in sa1111ps2
  iio: use parity32 in adxrs450
  serial: use parity32 in max3100
  input: use parity8 in elantech
  ethernet: use parity8 in broadcom/tg3.c

 arch/alpha/include/asm/bitops.h              |  27 +++++
 arch/arc/include/asm/bitops.h                |   1 +
 arch/arm/include/asm/bitops.h                |   1 +
 arch/arm64/include/asm/bitops.h              |   1 +
 arch/avr32/include/asm/bitops.h              |   1 +
 arch/blackfin/include/asm/bitops.h           |  31 ++++++
 arch/c6x/include/asm/bitops.h                |   1 +
 arch/cris/include/asm/bitops.h               |   1 +
 arch/frv/include/asm/bitops.h                |   1 +
 arch/h8300/include/asm/bitops.h              |   1 +
 arch/hexagon/include/asm/bitops.h            |   1 +
 arch/ia64/include/asm/bitops.h               |  31 ++++++
 arch/m32r/include/asm/bitops.h               |   1 +
 arch/m68k/include/asm/bitops.h               |   1 +
 arch/metag/include/asm/bitops.h              |   1 +
 arch/mips/include/asm/bitops.h               |   7 ++
 arch/mips/mm/cerr-sb1.c                      |  67 ++++---------
 arch/mn10300/include/asm/bitops.h            |   1 +
 arch/openrisc/include/asm/bitops.h           |   1 +
 arch/parisc/include/asm/bitops.h             |   1 +
 arch/powerpc/include/asm/bitops.h            |  11 +++
 arch/powerpc/lib/Makefile                    |   2 +-
 arch/powerpc/lib/parity_64.S                 | 142 +++++++++++++++++++++++++++
 arch/powerpc/lib/ppc_ksyms.c                 |   5 +
 arch/s390/include/asm/bitops.h               |   1 +
 arch/sh/include/asm/bitops.h                 |   1 +
 arch/sparc/include/asm/bitops_32.h           |   1 +
 arch/sparc/include/asm/bitops_64.h           |  18 ++++
 arch/sparc/kernel/sparc_ksyms_64.c           |   6 ++
 arch/sparc/lib/Makefile                      |   2 +-
 arch/sparc/lib/parity.S                      | 128 ++++++++++++++++++++++++
 arch/tile/include/asm/bitops.h               |   2 +
 arch/x86/include/asm/arch_hweight.h          |   5 +
 arch/x86/include/asm/arch_parity.h           | 117 ++++++++++++++++++++++
 arch/x86/include/asm/bitops.h                |   4 +-
 arch/xtensa/include/asm/bitops.h             |   1 +
 drivers/crypto/qat/qat_common/qat_hal.c      |  32 ++----
 drivers/iio/gyro/adxrs450.c                  |   4 +-
 drivers/input/joystick/grip_mp.c             |  16 +--
 drivers/input/joystick/sidewinder.c          |  24 +----
 drivers/input/mouse/elantech.c               |  10 +-
 drivers/input/mouse/elantech.h               |   1 -
 drivers/input/serio/ams_delta_serio.c        |   8 +-
 drivers/input/serio/pcips2.c                 |   2 +-
 drivers/input/serio/sa1111ps2.c              |   2 +-
 drivers/media/i2c/saa7115.c                  |  17 +---
 drivers/media/platform/vivid/vivid-vbi-gen.c |   9 +-
 drivers/mtd/inftlcore.c                      |  17 +---
 drivers/mtd/sm_ftl.c                         |   5 +-
 drivers/mtd/ssfdc.c                          |  31 ++----
 drivers/net/ethernet/broadcom/tg3.c          |   6 +-
 drivers/net/ethernet/sun/niu.c               |  10 +-
 drivers/scsi/isci/phy.c                      |  15 +--
 drivers/tty/serial/max3100.c                 |   2 +-
 include/asm-generic/bitops.h                 |   1 +
 include/asm-generic/bitops/arch_parity.h     |  39 ++++++++
 include/asm-generic/bitops/const_parity.h    |  36 +++++++
 include/asm-generic/bitops/parity.h          |   7 ++
 include/asm-generic/bitops/popc-parity.h     |  32 ++++++
 include/linux/bitops.h                       |  10 ++
 lib/bch.c                                    |  14 +--
 net/sunrpc/auth_gss/gss_krb5_keys.c          |   6 +-
 62 files changed, 745 insertions(+), 235 deletions(-)
 create mode 100644 arch/powerpc/lib/parity_64.S
 create mode 100644 arch/sparc/lib/parity.S
 create mode 100644 arch/x86/include/asm/arch_parity.h
 create mode 100644 include/asm-generic/bitops/arch_parity.h
 create mode 100644 include/asm-generic/bitops/const_parity.h
 create mode 100644 include/asm-generic/bitops/parity.h
 create mode 100644 include/asm-generic/bitops/popc-parity.h

-- 
2.5.0

Re: [PATCH V3 00/29] bitops: add parity functions

[Dmitry Torokhov]

On Thu, Apr 14, 2016 at 10:36:41AM +0800, zengzhaoxiu@163.com wrote:
>  drivers/input/joystick/grip_mp.c             |  16 +--
>  drivers/input/joystick/sidewinder.c          |  24 +----
>  drivers/input/mouse/elantech.c               |  10 +-
>  drivers/input/mouse/elantech.h               |   1 -
>  drivers/input/serio/ams_delta_serio.c        |   8 +-
>  drivers/input/serio/pcips2.c                 |   2 +-
>  drivers/input/serio/sa1111ps2.c              |   2 +-

For input bits:

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Thanks.

-- 
Dmitry