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Groups > linux.kernel > #1230482
| From | Christophe Leroy <christophe.leroy@c-s.fr> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 23/25] powerpc: Simplify test in __dma_sync() |
| Date | 2015-09-22 19:00 +0200 |
| Message-ID | <qbz5a-2KT-59@gated-at.bofh.it> (permalink) |
| References | <qbz57-2KT-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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> --- New in v2 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v2 23/25] powerpc: Simplify test in __dma_sync() Christophe Leroy <christophe.leroy@c-s.fr> - 2015-09-22 19:00 +0200
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