# \[PATCH v6 21/23\] powerpc: Simplify test in \_\_dma\_sync()

- From: Christophe Leroy \<hidden\>
- Date: 2016-02-04 10:35:09 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2016/02/4677807
- Thread: https://ratatoskr.run/linuxppc-dev/2016/02/4677847/t.md

```text
This simplification helps the compiler. We now have only one test
instead of two, so it reduces the number of branches.

Signed-off-by: Christophe Leroy <redacted>
---
v2: new
v3: no change
v4: no change
v5: no change
v6: no change

 arch/powerpc/mm/dma-noncoherent.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c
index 169aba4..2dc74e5 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -327,7 +327,7 @@ void __dma_sync(void *vaddr, size_t size, int direction)
 		 * invalidate only when cache-line aligned otherwise there is
 		 * the potential for discarding uncommitted data from the cache
 		 */
-		if ((start & (L1_CACHE_BYTES - 1)) || (size & (L1_CACHE_BYTES - 1)))
+		if ((start | end) & (L1_CACHE_BYTES - 1))
 			flush_dcache_range(start, end);
 		else
 			invalidate_dcache_range(start, end);
-- 
2.1.0
```