scsi: dma-mapping: always provide dma_get_cache_alignment

commit 860dd4424f344400b491b212ee4acb3a358ba9d9 upstream.

Provide the dummy version of dma_get_cache_alignment that always returns
1 even if CONFIG_HAS_DMA is not set, so that drivers and subsystems can
use it without ifdefs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
[bwh: Backported to 3.2: Also delete the conflicting declaration in
 <asm-generic/dma-mapping-broken.h>]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/include/asm-generic/dma-mapping-broken.h b/include/asm-generic/dma-mapping-broken.h
index ccf7b4f..12ec4b1 100644 (file)
--- a/include/asm-generic/dma-mapping-broken.h
+++ b/include/asm-generic/dma-mapping-broken.h
@@ -69,9 +69,6 @@ dma_supported(struct device *dev, u64 mask);
 extern int
 dma_set_mask(struct device *dev, u64 mask);
 
-extern int
-dma_get_cache_alignment(void);
-
 extern void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
               enum dma_data_direction direction);

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index e13117c..4b46319 100644 (file)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -130,7 +130,6 @@ static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
        return ret;
 }
 
-#ifdef CONFIG_HAS_DMA
 static inline int dma_get_cache_alignment(void)
 {
 #ifdef ARCH_DMA_MINALIGN
@@ -138,7 +137,6 @@ static inline int dma_get_cache_alignment(void)
 #endif
        return 1;
 }
-#endif
 
 /* flags for the coherent memory api */
 #define        DMA_MEMORY_MAP                  0x01