Commit 27153acb authored Feb 11, 2015 by Alexander Gordeev Committed by Paul E. McKenney Feb 26, 2015

rcu: Remove unnecessary condition check in rcu_qsctr_help()



When the ->curtail and ->donetail pointers differ, ->rcucblist
always points to the beginning of the current list and thus
cannot be NULL. Therefore, the check ->rcucblist != NULL is
redundant and this commit removes it.

Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent c517d838

kernel/rcu/tiny.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -103,8 +103,7 @@ EXPORT_SYMBOL(__rcu_is_watching);
		static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
		{
		RCU_TRACE(reset_cpu_stall_ticks(rcp));
		if (rcp->rcucblist != NULL &&
		rcp->donetail != rcp->curtail) {
		if (rcp->donetail != rcp->curtail) {
		rcp->donetail = rcp->curtail;
		return 1;
		}