diff options
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 * |