Commit cfca9279 authored Jun 25, 2012 by Paul E. McKenney Committed by Paul E. McKenney Jul 06, 2012

rcu: Introduce check for callback list/count mismatch



The recent bug that introduced the RCU callback list/count mismatch
showed the need for a diagnostic to check for this, which this commit
adds.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

parent cf01537e

kernel/rcutree.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1612,6 +1612,7 @@ static void rcu_do_batch(struct rcu_state rsp, struct rcu_data rdp)
		rdp->n_force_qs_snap = rsp->n_force_qs;
		} else if (rdp->qlen < rdp->qlen_last_fqs_check - qhimark)
		rdp->qlen_last_fqs_check = rdp->qlen;
		WARN_ON_ONCE((rdp->nxtlist == NULL) != (rdp->qlen == 0));

		local_irq_restore(flags);