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| author |   David Woodhouse <dwmw2@infradead.org> | 2010-05-19 12:01:42 +0100 |
|---|---|---|
| committer |   Pekka Enberg <penberg@cs.helsinki.fi> | 2010-05-19 22:03:13 +0300 |
| commit | 1f0ce8b3dd667dca720a47869f8110c298f0e5b8 (patch) | |
| tree | c0e260b5d8e6d3fe55be2bf6772265ad48878efd /include/linux/slab_def.h | |
| parent | Linus 2.6.34 (diff) | |
| download | linux-dev-1f0ce8b3dd667dca720a47869f8110c298f0e5b8.tar.xz linux-dev-1f0ce8b3dd667dca720a47869f8110c298f0e5b8.zip | |
mm: Move ARCH_SLAB_MINALIGN and ARCH_KMALLOC_MINALIGN to <linux/slab_def.h>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'include/linux/slab_def.h')
| -rw-r--r-- | include/linux/slab_def.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index ca6b2b317991..1812dac8c496 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -16,6 +16,30 @@ #include <linux/compiler.h> #include <linux/kmemtrace.h> +#ifndef ARCH_KMALLOC_MINALIGN +/* + * 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. + */ +#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 * |