Commit 3594216f authored by Neeraj Upadhyay's avatar Neeraj Upadhyay Committed by Greg Kroah-Hartman

rcu: Fix up pending cbs check in rcu_prepare_for_idle

commit 135bd1a2 upstream.

The pending-callbacks check in rcu_prepare_for_idle() is backwards.
It should accelerate if there are pending callbacks, but the check
rather uselessly accelerates only if there are no callbacks.  This commit
therefore inverts this check.

Fixes: 15fecf89 ("srcu: Abstract multi-tail callback list handling")
Signed-off-by: default avatarNeeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a371abb2
......@@ -1507,7 +1507,7 @@ static void rcu_prepare_for_idle(void)
rdtp->last_accelerate = jiffies;
for_each_rcu_flavor(rsp) {
rdp = this_cpu_ptr(rsp->rda);
if (rcu_segcblist_pend_cbs(&rdp->cblist))
if (!rcu_segcblist_pend_cbs(&rdp->cblist))
continue;
rnp = rdp->mynode;
raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */
......
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