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Commit 1ba9c5e6 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rtnetlink: Update now-misleading smp_read_barrier_depends() comment 



Now that READ_ONCE() implies smp_read_barrier_depends(), update the
rtnl_dereference() header comment accordingly.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Vladislav Yasevich <vyasevic@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
parent 137f61f6

include/linux/rtnetlink.h

+1 −2
Original line number Original line Diff line number Diff line
@@ -70,8 +70,7 @@ static inline bool lockdep_rtnl_is_held(void) 
 * @p: The pointer to read, prior to dereferencing

 * @p: The pointer to read, prior to dereferencing

 *

 *

 * Return the value of the specified RCU-protected pointer, but omit

 * Return the value of the specified RCU-protected pointer, but omit

 * both the smp_read_barrier_depends() and the READ_ONCE(), because

 * the READ_ONCE(), because caller holds RTNL.

 * caller holds RTNL.

 */

 */

#define rtnl_dereference(p)					\

#define rtnl_dereference(p)					\

	rcu_dereference_protected(p, lockdep_rtnl_is_held())

	rcu_dereference_protected(p, lockdep_rtnl_is_held())