[PATCH v3 21/23] powerpc: Simplify test in __dma_sync()
From: Christophe Leroy <hidden>
Date: 2015-11-17 14:13:08
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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 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);
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2.1.0