linux-kernel - [PATCH 2/12] arch/xtensa: Correct size given to memset

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Message-ID: <Pine.LNX.4.64.0912092022260.1870@ask.diku.dk>
Date:	Wed, 9 Dec 2009 20:22:49 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	Chris Zankel <chris@...kel.net>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 2/12] arch/xtensa: 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/xtensa/kernel/process.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -277,7 +277,7 @@ void xtensa_elf_core_copy_regs (xtensa_g
 
 	/* Don't leak any random bits. */
 
-	memset(elfregs, 0, sizeof (elfregs));
+	memset(elfregs, 0, sizeof(*elfregs));
 
 	/* Note:  PS.EXCM is not set while user task is running; its
 	 * being set in regs->ps is for exception handling convenience.
--
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