a6eb9fe105
Now each architecture has the own dma_get_cache_alignment implementation. dma_get_cache_alignment returns the minimum DMA alignment. Architectures define it as ARCH_KMALLOC_MINALIGN (it's used to make sure that malloc'ed buffer is DMA-safe; the buffer doesn't share a cache with the others). So we can unify dma_get_cache_alignment implementations. This patch: dma_get_cache_alignment() needs to know if an architecture defines ARCH_KMALLOC_MINALIGN or not (needs to know if architecture has DMA alignment restriction). However, slab.h define ARCH_KMALLOC_MINALIGN if architectures doesn't define it. Let's rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN. ARCH_KMALLOC_MINALIGN is used only in the internals of slab/slob/slub (except for crypto). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#ifndef __LINUX_SLOB_DEF_H
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#define __LINUX_SLOB_DEF_H
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#ifdef ARCH_DMA_MINALIGN
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#define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN
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#else
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#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long)
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#endif
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#ifndef ARCH_SLAB_MINALIGN
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#define ARCH_SLAB_MINALIGN __alignof__(unsigned long)
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#endif
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void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
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static __always_inline void *kmem_cache_alloc(struct kmem_cache *cachep,
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gfp_t flags)
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{
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return kmem_cache_alloc_node(cachep, flags, -1);
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}
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void *__kmalloc_node(size_t size, gfp_t flags, int node);
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static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
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{
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return __kmalloc_node(size, flags, node);
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}
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/**
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* kmalloc - allocate memory
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* @size: how many bytes of memory are required.
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* @flags: the type of memory to allocate (see kcalloc).
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*
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* kmalloc is the normal method of allocating memory
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* in the kernel.
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*/
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static __always_inline void *kmalloc(size_t size, gfp_t flags)
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{
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return __kmalloc_node(size, flags, -1);
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}
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static __always_inline void *__kmalloc(size_t size, gfp_t flags)
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{
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return kmalloc(size, flags);
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}
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#endif /* __LINUX_SLOB_DEF_H */
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