Commit c8ca1aa7 authored Nov 30, 2018 by Paul E. McKenney

srcu: Check for invalid idx argument in srcu_read_unlock()



The current SRCU implementation has an idx argument of zero or one,
and never anything else.  This commit therefore adds a WARN_ON_ONCE()
to complain if this restriction is violated.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

parent 7a968bb2

include/linux/srcu.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -223,6 +223,7 @@ srcu_read_lock_notrace(struct srcu_struct *ssp) __acquires(ssp)
		static inline void srcu_read_unlock(struct srcu_struct *ssp, int idx)
		__releases(ssp)
		{
		WARN_ON_ONCE(idx & ~0x1);
		rcu_lock_release(&(ssp)->dep_map);
		__srcu_read_unlock(ssp, idx);
		}