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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-08-11 05:03:22 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 19:59:21 +0400
commit4565f0170dfc849b3629c27d769db800467baa62 (patch)
treea2c70fb6f2f4826749b704ed83557623ca95bca5 /arch/x86
parenta6eb9fe105d5de0053b261148cee56c94b4720ca (diff)
downloadlinux-4565f0170dfc849b3629c27d769db800467baa62.tar.xz
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.h7
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)
{