linux-kernel - [PATCH 1/12] arch/arm: Correct size given to memset

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Date:	Wed, 9 Dec 2009 20:22:26 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	Sascha Hauer <kernel@...gutronix.de>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 1/12] arch/arm: Correct size given to memset

From: Julia Lawall <julia@...u.dk>

Memset should be given the size of the structure, not the size of the pointer.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T *x;
expression E;
@@

memset(x, E, sizeof(
+ *
 x))
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 arch/arm/plat-mxc/dma-mx1-mx2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/arch/arm/plat-mxc/dma-mx1-mx2.c b/arch/arm/plat-mxc/dma-mx1-mx2.c
--- a/arch/arm/plat-mxc/dma-mx1-mx2.c
+++ b/arch/arm/plat-mxc/dma-mx1-mx2.c
@@ -694,7 +694,7 @@ int imx_dma_request(int channel, const c
 		local_irq_restore(flags);
 		return -EBUSY;
 	}
-	memset(imxdma, 0, sizeof(imxdma));
+	memset(imxdma, 0, sizeof(*imxdma));
 	imxdma->name = name;
 	local_irq_restore(flags); /* request_irq() can block */
 
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