From: Julia Lawall <julia@diku.dk>
Date: Fri, 9 Jan 2009 10:22:22 +0000 (+0000)
Subject: net/bridge/netfilter: move a dereference below a NULL test
X-Git-Tag: v2.6.29-rc2~105^2~23
X-Git-Url: http://ftp.safe.ca/?a=commitdiff_plain;h=f3d8b2e467da7a9237a45248ff03b56b6a7c3df7;p=safe%2Fjmp%2Flinux-2.6

net/bridge/netfilter: move a dereference below a NULL test

In each case, if the NULL test is necessary, then the dereference should be
moved below the NULL test.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@

- T i = E->fld;
+ T i;
  ... when != E
      when != i
  if (E == NULL) S
+ i = E->fld;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index fa108c4..8a8743d 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -85,12 +85,13 @@ static inline int ebt_do_match (struct ebt_entry_match *m,
 static inline int ebt_dev_check(char *entry, const struct net_device *device)
 {
 	int i = 0;
-	const char *devname = device->name;
+	const char *devname;
 
 	if (*entry == '\0')
 		return 0;
 	if (!device)
 		return 1;
+	devname = device->name;
 	/* 1 is the wildcard token */
 	while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i])
 		i++;