diff options
Diffstat (limited to 'include/linux/slab.h')
-rw-r--r-- | include/linux/slab.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 646a639a4aae..573c809c33d9 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h | |||
@@ -133,12 +133,22 @@ unsigned int kmem_cache_size(struct kmem_cache *); | |||
133 | #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_HIGH) | 133 | #define KMALLOC_MAX_SIZE (1UL << KMALLOC_SHIFT_HIGH) |
134 | #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_HIGH - PAGE_SHIFT) | 134 | #define KMALLOC_MAX_ORDER (KMALLOC_SHIFT_HIGH - PAGE_SHIFT) |
135 | 135 | ||
136 | /* | ||
137 | * Some archs want to perform DMA into kmalloc caches and need a guaranteed | ||
138 | * alignment larger than the alignment of a 64-bit integer. | ||
139 | * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that. | ||
140 | */ | ||
136 | #ifdef ARCH_DMA_MINALIGN | 141 | #ifdef ARCH_DMA_MINALIGN |
137 | #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN | 142 | #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN |
138 | #else | 143 | #else |
139 | #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) | 144 | #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long) |
140 | #endif | 145 | #endif |
141 | 146 | ||
147 | /* | ||
148 | * Setting ARCH_SLAB_MINALIGN in arch headers allows a different alignment. | ||
149 | * Intended for arches that get misalignment faults even for 64 bit integer | ||
150 | * aligned buffers. | ||
151 | */ | ||
142 | #ifndef ARCH_SLAB_MINALIGN | 152 | #ifndef ARCH_SLAB_MINALIGN |
143 | #define ARCH_SLAB_MINALIGN __alignof__(unsigned long long) | 153 | #define ARCH_SLAB_MINALIGN __alignof__(unsigned long long) |
144 | #endif | 154 | #endif |