rt/locking: allow recursive local_trylock()

required for following networking patch which does recursive try-lock.
While at it, add the !RT version of it because it did not yet exist.

Cc: stable-rt@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed