[tip:tracing/core] tracing: Fix minor bugs for __unregister_ftrace_function_probe

[tip-bot for Atsushi Tsuji <a-tsuji@bk.jp.nec.com>]

Commit-ID:  b36461da2a0389149d7f88f3cbc05a30d1db9faa
Gitweb:     http://git.kernel.org/tip/b36461da2a0389149d7f88f3cbc05a30d1db9faa
Author:     Atsushi Tsuji <a-tsuji@bk.jp.nec.com>
AuthorDate: Tue, 15 Sep 2009 19:06:30 +0900
Committer:  Steven Rostedt <rostedt@goodmis.org>
CommitDate: Wed, 16 Sep 2009 09:08:54 -0400

tracing: Fix minor bugs for __unregister_ftrace_function_probe

Fix the condition of strcmp for "*".
Also fix NULL pointer dereference when glob is NULL.

Signed-off-by: Atsushi Tsuji <a-tsuji@bk.jp.nec.com>
LKML-Reference: <4AAF6726.5090905@bk.jp.nec.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>


---
 kernel/trace/ftrace.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 8b23d56..f7ab7fc 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2062,9 +2062,9 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 	int i, len = 0;
 	char *search;
 
-	if (glob && (strcmp(glob, "*") || !strlen(glob)))
+	if (glob && (strcmp(glob, "*") == 0 || !strlen(glob)))
 		glob = NULL;
-	else {
+	else if (glob) {
 		int not;
 
 		type = ftrace_setup_glob(glob, strlen(glob), &search, &not);