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>
void
update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
{
- struct ring_buffer *buf;
-
if (tr->stop_count)
return;
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);