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[PATCH v6 21/23] powerpc: Simplify test in __dma_sync()

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  [PATCH v6 21/23] powerpc: Simplify test in __dma_sync() Christophe Leroy <christophe.leroy@c-s.fr> - 2016-02-04 11:40 +0100

#1326628 — [PATCH v6 21/23] powerpc: Simplify test in __dma_sync()

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 <christophe.leroy@c-s.fr>
---
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

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