[for-next][PATCH 2/9] tracing: Use pr_warn_once instead of open coded implementation

Steven Rostedt
2013-03-16T03:32:17Z

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From: "zhangwei(Jovi)" <jovi.zhangwei@huawei.com>

Use pr_warn_once, instead of making an open coded implementation.

Link: http://lkml.kernel.org/r/513D8419.20400@huawei.com

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 7f0e7fa..bba1ba9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5205,8 +5205,6 @@ static inline int register_snapshot_cmd(void) { return 0; }

struct dentry *tracing_init_dentry_tr(struct trace_array *tr)
{
- static int once;
-
if (tr->dir)
return tr->dir;

@@ -5216,11 +5214,8 @@ struct dentry *tracing_init_dentry_tr(struct trace_array *tr)
if (tr->flags & TRACE_ARRAY_FL_GLOBAL)
tr->dir = debugfs_create_dir("tracing", NULL);

- if (!tr->dir && !once) {
- once = 1;
- pr_warning("Could not create debugfs directory 'tracing'\n");
- return NULL;
- }
+ if (!tr->dir)
+ pr_warn_once("Could not create debugfs directory 'tracing'\n");

return tr->dir;
}