lkml.org 
[lkml]   [2016]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 21/23] powerpc: Simplify test in __dma_sync()
Date
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
v8: 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
\
 
 \ /
  Last update: 2016-02-09 17:41    [W:0.084 / U:1.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site