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>
13 lines
325 B
C
13 lines
325 B
C
#ifndef __ASM_MACH_GENERIC_KMALLOC_H
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#define __ASM_MACH_GENERIC_KMALLOC_H
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#ifndef CONFIG_DMA_COHERENT
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/*
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* Total overkill for most systems but need as a safe default.
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* Set this one if any device in the system might do non-coherent DMA.
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*/
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#define ARCH_DMA_MINALIGN 128
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#endif
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#endif /* __ASM_MACH_GENERIC_KMALLOC_H */
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