Messages in this thread Patch in this message | | | Date | Thu, 29 Oct 2015 03:07:59 -0400 | From | Steven Rostedt <> | Subject | [for-next][PATCH 5/5] tracing: Fix sparse RCU warning |
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From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
p_start() and p_stop() are seq_file functions that match. Teach sparse to know that rcu_read_lock_sched() that is taken by p_start() is released by p_stop.
Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- kernel/trace/trace_events.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 2b7fccd499c6..fb0261e90acc 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -938,6 +938,7 @@ static void t_stop(struct seq_file *m, void *p) } static void *p_start(struct seq_file *m, loff_t *pos) + __acquires(RCU) { struct trace_pid_list *pid_list; struct trace_array *tr = m->private; @@ -960,6 +961,7 @@ static void *p_start(struct seq_file *m, loff_t *pos) } static void p_stop(struct seq_file *m, void *p) + __releases(RCU) { rcu_read_unlock_sched(); mutex_unlock(&event_mutex); -- 2.6.1
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