[PATCH 00/17] Introduce and use generic parity32/64 helper

Kuan-Wei Chiu
2025-02-23T16:42:48Z

Several parts of the kernel contain redundant implementations of parity
calculations for 32-bit and 64-bit values. Introduces generic
parity32() and parity64() helpers in bitops.h, providing a standardized
and optimized implementation.

Subsequent patches refactor various kernel components to replace
open-coded parity calculations with the new helpers, reducing code
duplication and improving maintainability.

Co-developed-by: Yu-Chun Lin <eleanor15x@gmail.com>
Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>

Kuan-Wei Chiu (17):
bitops: Add generic parity calculation for u32
bitops: Add generic parity calculation for u64
x86: Replace open-coded parity calculation with parity8()
media: media/test_drivers: Replace open-coded parity calculation with
parity8()
media: pci: cx18-av-vbi: Replace open-coded parity calculation with
parity8()
media: saa7115: Replace open-coded parity calculation with parity8()
serial: max3100: Replace open-coded parity calculation with parity8()
lib/bch: Replace open-coded parity calculation with parity32()
Input: joystick - Replace open-coded parity calculation with
parity32()
net: ethernet: oa_tc6: Replace open-coded parity calculation with
parity32()
wifi: brcm80211: Replace open-coded parity calculation with parity32()
rm/bridge: dw-hdmi: Replace open-coded parity calculation with
parity32()
mtd: ssfdc: Replace open-coded parity calculation with parity32()
fsi: i2cr: Replace open-coded parity calculation with parity32()
fsi: i2cr: Replace open-coded parity calculation with parity64()
Input: joystick - Replace open-coded parity calculation with
parity64()
nfp: bpf: Replace open-coded parity calculation with parity64()

arch/x86/kernel/bootflag.c | 18 ++------
drivers/fsi/fsi-master-i2cr.c | 18 ++------
.../drm/bridge/synopsys/dw-hdmi-ahb-audio.c | 8 +---
drivers/input/joystick/grip_mp.c | 17 +-------
drivers/input/joystick/sidewinder.c | 24 +++--------
drivers/media/i2c/saa7115.c | 12 +-----
drivers/media/pci/cx18/cx18-av-vbi.c | 12 +-----
.../media/test-drivers/vivid/vivid-vbi-gen.c | 8 +---
drivers/mtd/ssfdc.c | 17 +-------
drivers/net/ethernet/netronome/nfp/nfp_asm.c | 7 +--
drivers/net/ethernet/oa_tc6.c | 19 ++------
.../broadcom/brcm80211/brcmsmac/dma.c | 16 +------
drivers/tty/serial/max3100.c | 3 +-
include/linux/bitops.h | 43 +++++++++++++++++++
lib/bch.c | 14 +-----
15 files changed, 74 insertions(+), 162 deletions(-)

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2.34.1