do { } while(0) is not a good imitation of function returning void;
use ((void)0) instead.
Signed-off-by: Al Viro <[email protected]>
---
include/asm-alpha/dma-mapping.h | 6 +++---
include/asm-powerpc/dma-mapping.h | 12 ++++++------
2 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/asm-alpha/dma-mapping.h b/include/asm-alpha/dma-mapping.h
index 1919d72..75a1aff 100644
--- a/include/asm-alpha/dma-mapping.h
+++ b/include/asm-alpha/dma-mapping.h
@@ -41,9 +41,9 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
#define dma_map_single(dev, va, size, dir) virt_to_phys(va)
#define dma_map_page(dev, page, off, size, dir) (page_to_pa(page) + off)
-#define dma_unmap_single(dev, addr, size, dir) do { } while (0)
-#define dma_unmap_page(dev, addr, size, dir) do { } while (0)
-#define dma_unmap_sg(dev, sg, nents, dir) do { } while (0)
+#define dma_unmap_single(dev, addr, size, dir) ((void)0)
+#define dma_unmap_page(dev, addr, size, dir) ((void)0)
+#define dma_unmap_sg(dev, sg, nents, dir) ((void)0)
#define dma_mapping_error(addr) (0)
diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h
index 7c7de87..a19a6f1 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -37,9 +37,9 @@ extern void __dma_sync_page(struct page *page, unsigned long offset,
*/
#define __dma_alloc_coherent(gfp, size, handle) NULL
-#define __dma_free_coherent(size, addr) do { } while (0)
-#define __dma_sync(addr, size, rw) do { } while (0)
-#define __dma_sync_page(pg, off, sz, rw) do { } while (0)
+#define __dma_free_coherent(size, addr) ((void)0)
+#define __dma_sync(addr, size, rw) ((void)0)
+#define __dma_sync_page(pg, off, sz, rw) ((void)0)
#endif /* ! CONFIG_NOT_COHERENT_CACHE */
@@ -251,7 +251,7 @@ dma_map_single(struct device *dev, void *ptr, size_t size,
}
/* We do nothing. */
-#define dma_unmap_single(dev, addr, size, dir) do { } while (0)
+#define dma_unmap_single(dev, addr, size, dir) ((void)0)
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
@@ -266,7 +266,7 @@ dma_map_page(struct device *dev, struct page *page,
}
/* We do nothing. */
-#define dma_unmap_page(dev, handle, size, dir) do { } while (0)
+#define dma_unmap_page(dev, handle, size, dir) ((void)0)
static inline int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
@@ -286,7 +286,7 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
}
/* We don't do anything here. */
-#define dma_unmap_sg(dev, sg, nents, dir) do { } while (0)
+#define dma_unmap_sg(dev, sg, nents, dir) ((void)0)
#endif /* CONFIG_PPC64 */
--
1.5.0-rc2.GIT