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Groups > linux.kernel > #1705112

[PATCH] rcu: Fix up pending cbs check in rcu_prepare_for_idle

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Pending cbs check in rcu_prepare_for_idle is inversed
in the sense that, it should accelerate if there are
pending cbs; but, the check does the opposite. So,
fix it.

Fixes: 15fecf89e46a ("srcu: Abstract multi-tail callback list handling")
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
---
 kernel/rcu/tree_plugin.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 908b309..b8f51df 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1493,7 +1493,7 @@ 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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member of the Code Aurora Forum, hosted by The Linux Foundation

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[PATCH] rcu: Fix up pending cbs check in rcu_prepare_for_idle Neeraj Upadhyay <neeraju@codeaurora.org> - 2017-08-07 08:00 +0200
  Re: [PATCH] rcu: Fix up pending cbs check in rcu_prepare_for_idle "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-08-07 14:50 +0200
    Re: [PATCH] rcu: Fix up pending cbs check in rcu_prepare_for_idle Neeraj Upadhyay <neeraju@codeaurora.org> - 2017-08-07 16:10 +0200
      Re: [PATCH] rcu: Fix up pending cbs check in rcu_prepare_for_idle "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-08-07 16:20 +0200

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