signal: Cleanup flush_sigqueue_mask()

Mop up the stale return value comment and add a lockdep check instead of
commenting on the locking requirement.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/all/20241001083835.374933959@linutronix.de
This commit is contained in:
Thomas Gleixner 2024-10-01 10:42:02 +02:00
commit a76e1bbe87