linux-kernel - [PATCH] dmaengine: use kmem_cache_zalloc instead of kmem_cache

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Date:	Mon, 27 Aug 2012 12:40:42 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	vinod.koul@...el.com, djbw@...com
Cc:	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: use kmem_cache_zalloc instead of kmem_cache_alloc/memset

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Using kmem_cache_zalloc() instead of kmem_cache_alloc() and memset().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/dma/ioat/dma_v2.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 8689576..b9d6678 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -434,12 +434,11 @@ static struct ioat_ring_ent *ioat2_alloc_ring_ent(struct dma_chan *chan, gfp_t f
 		return NULL;
 	memset(hw, 0, sizeof(*hw));
 
-	desc = kmem_cache_alloc(ioat2_cache, flags);
+	desc = kmem_cache_zalloc(ioat2_cache, flags);
 	if (!desc) {
 		pci_pool_free(dma->dma_pool, hw, phys);
 		return NULL;
 	}
-	memset(desc, 0, sizeof(*desc));
 
 	dma_async_tx_descriptor_init(&desc->txd, chan);
 	desc->txd.tx_submit = ioat2_tx_submit_unlock;

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