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authorAkinobu Mita <akinobu.mita@gmail.com>2012-10-28 00:49:33 +0900
committerVinod Koul <vinod.koul@intel.com>2013-01-07 22:04:56 -0800
commit2c88ae90939c2ef8ae80b07713b898c577b81598 (patch)
treefc4ea2caa03fb7443c0951a7a16dbef71ba51f5c /crypto
parent1ba151cdf5ac120fc829ee6524fefedc6828947f (diff)
downloadvexpress-lsk-2c88ae90939c2ef8ae80b07713b898c577b81598.tar.gz
async_tx: use memchr_inv
Use memchr_inv() to check the specified page is filled with zero. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <djbw@fb.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/async_tx/async_xor.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 154cc84381c..8ade0a0481c 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -230,9 +230,7 @@ EXPORT_SYMBOL_GPL(async_xor);
static int page_is_zero(struct page *p, unsigned int offset, size_t len)
{
- char *a = page_address(p) + offset;
- return ((*(u32 *) a) == 0 &&
- memcmp(a, a + 4, len - 4) == 0);
+ return !memchr_inv(page_address(p) + offset, 0, len);
}
static inline struct dma_chan *