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Message-ID: <Pine.LNX.4.64.0907301607550.8734@ask.diku.dk>
Date: Thu, 30 Jul 2009 16:08:34 +0200 (CEST)
From: Julia Lawall <julia@...u.dk>
To: jdike@...toit.com, user-mode-linux-devel@...ts.sourceforge.net,
user-mode-linux-user@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 2/5] fs/hppfs: Add kmalloc NULL tests
From: Julia Lawall <julia@...u.dk>
Test the result of kmalloc using a ! test, as most commonly done elsewhere,
rather than a test on 0.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression *x;
identifier f;
constant char *C;
@@
x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
when != x != NULL
when != (x || ...)
(
kfree(x)
|
f(...,C,...,x,...)
|
*f(...,x,...)
|
*x->f
)
// </smpl>
Signed-off-by: Julia Lawall <julia@...u.dk>
---
fs/hppfs/hppfs.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..b705a3c 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -385,7 +385,7 @@ static struct hppfs_data *hppfs_get_data(int fd, int filter,
break;
new = kmalloc(sizeof(*data), GFP_KERNEL);
- if (new == 0) {
+ if (!new) {
printk(KERN_ERR "hppfs_get_data : data allocation "
"failed\n");
err = -ENOMEM;
--
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