The patch regmap: use IS_ALIGNED instead of % to improve the performance
has been applied to the regmap tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From fcac0233d89ddce72945f3e0afaf4680572d8525 Mon Sep 17 00:00:00 2001 From: Xiubo Li <[email protected]> Date: Wed, 16 Dec 2015 17:45:32 +0800 Subject: [PATCH] regmap: use IS_ALIGNED instead of % to improve the performance The stride value should always equal to 2^n, so we can use bit rotation instead of % to improve the performance. Signed-off-by: Xiubo Li <[email protected]> Signed-off-by: Mark Brown <[email protected]> --- drivers/base/regmap/regmap.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 4ac63c0e50c7..a8f6dd9457be 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1513,7 +1513,7 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val) { int ret; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; map->lock(map->lock_arg); @@ -1540,7 +1540,7 @@ int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) { int ret; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; map->lock(map->lock_arg); @@ -1714,7 +1714,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, if (map->bus && !map->format.parse_inplace) return -EINVAL; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; /* @@ -1983,7 +1983,7 @@ static int _regmap_multi_reg_write(struct regmap *map, int reg = regs[i].reg; if (!map->writeable_reg(map->dev, reg)) return -EINVAL; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; } @@ -2133,7 +2133,7 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg, if (val_len % map->format.val_bytes) return -EINVAL; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; map->lock(map->lock_arg); @@ -2260,7 +2260,7 @@ int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val) { int ret; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; map->lock(map->lock_arg); @@ -2296,7 +2296,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, return -EINVAL; if (val_len % map->format.val_bytes) return -EINVAL; - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; if (val_count == 0) return -EINVAL; @@ -2414,7 +2414,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val, size_t val_bytes = map->format.val_bytes; bool vol = regmap_volatile_range(map, reg, val_count); - if (reg % map->reg_stride) + if (!IS_ALIGNED(reg, map->reg_stride)) return -EINVAL; if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) { -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
