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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-08-01 16:06:02 -0400 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-08-01 16:06:02 -0400 |
| commit | 978defee11a5d54f8f546e79867d2aab1b50606b (patch) | |
| tree | 1cafefa160f1cfb9a397a7526860a9088ea48ac0 /kernel/trace | |
| parent | 82fbc8c48adffd73297e7edbd7266a89d00cc52f (diff) | |
| download | linux-0-day-978defee11a5d54f8f546e79867d2aab1b50606b.tar.gz linux-0-day-978defee11a5d54f8f546e79867d2aab1b50606b.tar.xz | |
tracing: Do a WARN_ON() if start_thread() in hwlat is called when thread exists
The start function of the hwlat tracer should never be called when the hwlat
thread already exists. If it is called, do a WARN_ON().
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_hwlat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c index 2d9d36dd5fe77..688e48be7bb51 100644 --- a/kernel/trace/trace_hwlat.c +++ b/kernel/trace/trace_hwlat.c @@ -354,7 +354,7 @@ static int start_kthread(struct trace_array *tr) struct task_struct *kthread; int next_cpu; - if (hwlat_kthread) + if (WARN_ON(hwlat_kthread)) return 0; /* Just pick the first CPU on first iteration */ |