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| author | Christoph Lameter <cl@linux.com> | 2011-06-15 01:16:36 +0400 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2011-06-16 20:40:20 +0400 |
| commit | 3192b920bf7d0c528ab54e7d3689f44055316a37 (patch) | |
| tree | f907471f606a17cef0c1af4bc2187cdd4ee26c64 /include/linux/slab_def.h | |
| parent | bd50cfa89153a67429935a15e577a5eb5f10dd1b (diff) | |
| download | linux-3192b920bf7d0c528ab54e7d3689f44055316a37.tar.xz | |
slab, slub, slob: Unify alignment definition
Every slab has its on alignment definition in include/linux/sl?b_def.h. Extract those
and define a common set in include/linux/slab.h.
SLOB: As notes sometimes we need double word alignment on 32 bit. This gives all
structures allocated by SLOB a unsigned long long alignment like the others do.
SLAB: If ARCH_SLAB_MINALIGN is not set SLAB would set ARCH_SLAB_MINALIGN to
zero meaning no alignment at all. Give it the default unsigned long long alignment.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slab_def.h')
| -rw-r--r-- | include/linux/slab_def.h | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index 83203ae9390b..d7f63112f63c 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -18,32 +18,6 @@ #include <trace/events/kmem.h> /* - * Enforce a minimum alignment for the kmalloc caches. - * Usually, the kmalloc caches are cache_line_size() aligned, except when - * DEBUG and FORCED_DEBUG are enabled, then they are BYTES_PER_WORD aligned. - * Some archs want to perform DMA into kmalloc caches and need a guaranteed - * alignment larger than the alignment of a 64-bit integer. - * ARCH_KMALLOC_MINALIGN allows that. - * Note that increasing this value may disable some debug features. - */ -#ifdef ARCH_DMA_MINALIGN -#define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN -#else -#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) -#endif - -#ifndef ARCH_SLAB_MINALIGN -/* - * Enforce a minimum alignment for all caches. - * Intended for archs that get misalignment faults even for BYTES_PER_WORD - * aligned buffers. Includes ARCH_KMALLOC_MINALIGN. - * If possible: Do not enable this flag for CONFIG_DEBUG_SLAB, it disables - * some debug features. - */ -#define ARCH_SLAB_MINALIGN 0 -#endif - -/* * struct kmem_cache * * manages a cache. |