[PATCH][GIT PULL] perf: Fix check at end of event search

[Steven Rostedt <rostedt@goodmis.org>]

Ingo,

I just notice that I had this patch laying around and never pushed it
out. I first had it in my ftrace branches but then realized that it was
a perf change. I moved it there, but got distracted and unfortunately,
forgot about it. I rebased it to the latest tip/perf/core.

The change is within a #ifdef CONFIG_PERF_EVENTS

Please pull the latest tip/perf/core tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
tip/perf/core


Dan Carpenter (1):
      perf: Fix check at end of event search

----
 kernel/trace/trace_events_filter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---------------------------
commit d9f599e1e6d019968b35d2dc63074b9e8964fa69
Author: Dan Carpenter <error27@gmail.com>
Date:   Sat Mar 20 17:39:11 2010 +0300

    perf: Fix check at end of event search
    
    The original code doesn't work because "call" is never NULL there.
    
    Signed-off-by: Dan Carpenter <error27@gmail.com>
    LKML-Reference: <20100320143911.GF5331@bicker>
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 88c0b6d..58092d8 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1398,7 +1398,7 @@ int ftrace_profile_set_filter(struct perf_event *event, int event_id,
 	}
 
 	err = -EINVAL;
-	if (!call)
+	if (&call->list == &ftrace_events)
 		goto out_unlock;
 
 	err = -EEXIST;