| Message ID | 20220405135758.774016-11-catalin.marinas@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm, arm64: Reduce ARCH_KMALLOC_MINALIGN below the cache line size | expand |
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h index a074459f8f2f..0bec986c9d51 100644 --- a/arch/arm64/include/asm/cache.h +++ b/arch/arm64/include/asm/cache.h @@ -48,6 +48,7 @@ * the CPU. */ #define ARCH_DMA_MINALIGN (128) +#define ARCH_KMALLOC_MINALIGN (64) #ifdef CONFIG_KASAN_SW_TAGS #define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT) diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c index 587543c6c51c..61211cd597f7 100644 --- a/arch/arm64/kernel/cacheinfo.c +++ b/arch/arm64/kernel/cacheinfo.c @@ -97,3 +97,10 @@ int populate_cache_leaves(unsigned int cpu) } return 0; } + +#ifndef CONFIG_SLOB +unsigned int arch_kmalloc_minalign(void) +{ + return cache_line_size(); +} +#endif
Define ARCH_KMALLOC_MINALIGN as 64 since this would be the minimum requirement across most arm64 SoCs. Define arch_kmalloc_minalign() returning cache_line_size() to set the minimum run-time kmalloc() alignment for those SoCs with bigger cache lines. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> --- arch/arm64/include/asm/cache.h | 1 + arch/arm64/kernel/cacheinfo.c | 7 +++++++ 2 files changed, 8 insertions(+)