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tracing: Check return value of tracing_init_dentry()

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commit ed6f1c996b upstream.

Check return value and bail out if it's NULL.

Link: http://lkml.kernel.org/r/1365553093-10180-2-git-send-email-namhyung@kernel.org

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namhyung Kim 2013-04-10 09:18:12 +09:00 committed by Greg Kroah-Hartman
parent 226c8ea60c
commit e1672f4e2c
3 changed files with 6 additions and 0 deletions
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2
kernel/trace/trace.c
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@ -4717,6 +4717,8 @@ static __init int tracer_init_debugfs(void)
trace_access_lock_init();
d_tracer = tracing_init_dentry();
if (!d_tracer)
return 0;
trace_create_file("tracing_enabled", 0644, d_tracer,
&global_trace, &tracing_ctrl_fops);

2
kernel/trace/trace_stack.c
View file

@ -433,6 +433,8 @@ static __init int stack_trace_init(void)
struct dentry *d_tracer;
d_tracer = tracing_init_dentry();
if (!d_tracer)
return 0;
trace_create_file("stack_max_size", 0644, d_tracer,
&max_stack_size, &stack_max_size_fops);

2
kernel/trace/trace_stat.c
View file

@ -307,6 +307,8 @@ static int tracing_stat_init(void)
struct dentry *d_tracing;
d_tracing = tracing_init_dentry();
if (!d_tracing)
return 0;
stat_dir = debugfs_create_dir("trace_stat", d_tracing);
if (!stat_dir)