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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/ia64
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/ia64')
-rw-r--r--arch/ia64/include/asm/dma-mapping.h2
-rw-r--r--arch/ia64/kernel/setup.c6
2 files changed, 0 insertions, 8 deletions
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 7d09a09cdaad..8d52deed3750 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -86,8 +86,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
return daddr;
}
-extern int dma_get_cache_alignment(void);
-
static inline void
dma_cache_sync (struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 41ae6a596b50..8fb958abf8d0 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -98,12 +98,6 @@ static struct resource bss_resource = {
unsigned long ia64_max_cacheline_size;
-int dma_get_cache_alignment(void)
-{
- return ia64_max_cacheline_size;
-}
-EXPORT_SYMBOL(dma_get_cache_alignment);
-
unsigned long ia64_iobase; /* virtual address for I/O accesses */
EXPORT_SYMBOL(ia64_iobase);
struct io_space io_space[MAX_IO_SPACES];