diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-02-09 18:53:16 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-06-21 21:12:43 +0200 |
| commit | 08ae88f8104f486fd4103854119169f3e55dbc4c (patch) | |
| tree | 8b85d4520b0e6ec6249a104365dc3a885dfa09b8 | |
| parent | softirq: Reorder trace_softirqs_on to prevent lockdep splat (diff) | |
| download | linux-08ae88f8104f486fd4103854119169f3e55dbc4c.tar.xz linux-08ae88f8104f486fd4103854119169f3e55dbc4c.zip | |
tracing: Use swap macro in update_max_tr
Make use of the swap macro and remove unnecessary variable _buf_.
This makes the code easier to read and maintain. Also, reduces the
stack usage.
This code was detected with the help of Coccinelle.
Link: http://lkml.kernel.org/r/20180209175316.GA18720@embeddedgus
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/trace.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index c9336e98ac59..a0079b4c7a49 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1360,8 +1360,6 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) { - struct ring_buffer *buf; - if (tr->stop_count) return; @@ -1375,9 +1373,7 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) arch_spin_lock(&tr->max_lock); - buf = tr->trace_buffer.buffer; - tr->trace_buffer.buffer = tr->max_buffer.buffer; - tr->max_buffer.buffer = buf; + swap(tr->trace_buffer.buffer, tr->max_buffer.buffer); __update_max_tr(tr, tsk, cpu); arch_spin_unlock(&tr->max_lock); |