tree 6dc9ca3bf077bf58352fe67e8adb4d4b304baba1
parent 620678244bc7b83287e2e283ed4fe6b959e94b7d
author Julien Brunel <brunel@diku.dk> 1222291342 -0500
committer Eric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com> 1222291342 -0500

9p: use an IS_ERR test rather than a NULL test

In case of error, the function p9_client_walk returns an ERR pointer, but
never returns a NULL pointer.  So a NULL test that comes after an IS_ERR
test should be deleted.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@match_bad_null_test@
expression x, E;
statement S1,S2;
@@
x = p9_client_walk(...)
... when != x = E
*  if (x != NULL)
S1 else S2
// </smpl>

Signed-off-by: Julien Brunel <brunel@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>