Commit 73f36f9d authored by Paul E. McKenney's avatar Paul E. McKenney

rcu: Make expedited grace periods resolve stall-warning ties

Currently, if a grace period ends just as the stall-warning timeout
fires, an empty stall warning will be printed.  This is not helpful,
so this commit avoids these useless warnings by rechecking completion
after awakening in synchronize_sched_expedited_wait().
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent df5bd514
...@@ -3757,7 +3757,7 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp) ...@@ -3757,7 +3757,7 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp)
rsp->expedited_wq, rsp->expedited_wq,
sync_rcu_preempt_exp_done(rnp_root), sync_rcu_preempt_exp_done(rnp_root),
jiffies_stall); jiffies_stall);
if (ret > 0) if (ret > 0 || sync_rcu_preempt_exp_done(rnp_root))
return; return;
if (ret < 0) { if (ret < 0) {
/* Hit a signal, disable CPU stall warnings. */ /* Hit a signal, disable CPU stall warnings. */
......
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