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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-08-10 18:03:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-11 08:59:21 -0700 |
| commit | 4565f0170dfc849b3629c27d769db800467baa62 (patch) | |
| tree | a2c70fb6f2f4826749b704ed83557623ca95bca5 /arch/x86 | |
| parent | a6eb9fe105d5de0053b261148cee56c94b4720ca (diff) | |
| download | linux-4565f0170dfc849b3629c27d769db800467baa62.tar.gz | |
dma-mapping: unify dma_get_cache_alignment implementations
dma_get_cache_alignment returns the minimum DMA alignment. Architectures defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN). So we can unify dma_get_cache_alignment implementations. Note that some architectures implement dma_get_cache_alignment wrongly. dma_get_cache_alignment() should return the minimum DMA alignment. So fully-coherent architectures should return 1. This patch also fixes this issue. 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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/dma-mapping.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index ac91eed21061..f9c67e83f648 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -87,13 +87,6 @@ dma_cache_sync(struct device *dev, void *vaddr, size_t size, flush_write_buffers(); } -static inline int dma_get_cache_alignment(void) -{ - /* no easy way to get cache size on all x86, so return the - * maximum possible, to be safe */ - return boot_cpu_data.x86_clflush_size; -} - static inline unsigned long dma_alloc_coherent_mask(struct device *dev, gfp_t gfp) { |