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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-06-29 14:34:59 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2016-08-22 09:30:26 -0700
commit908d2c1fd156d414008e1b7e1fb5a7716e013231 (patch)
treed809541bf135fd933a30bf05a326ee3318023846 /kernel/rcu
parent8b355e3bc1408be238ae4695fb6318ae502cae8e (diff)
downloadlinux-908d2c1fd156d414008e1b7e1fb5a7716e013231.tar.bz2
rcu: Stop disabling expedited RCU CPU stall warnings
Now that RCU expedited grace periods are always driven by a workqueue, there is no need to account for signal reception, and thus no need to disable expedited RCU CPU stall warnings due to signal reception. This commit therefore removes the signal-reception checks, leaving a WARN_ON() to catch possible future bugs. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree_exp.h7
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 97f5ffe42b58..3a647eb96f23 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -427,12 +427,7 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp)
jiffies_stall);
if (ret > 0 || sync_rcu_preempt_exp_done(rnp_root))
return;
- if (ret < 0) {
- /* Hit a signal, disable CPU stall warnings. */
- swait_event(rsp->expedited_wq,
- sync_rcu_preempt_exp_done(rnp_root));
- return;
- }
+ WARN_ON(ret < 0); /* workqueues should not be signaled. */
pr_err("INFO: %s detected expedited stalls on CPUs/tasks: {",
rsp->name);
ndetected = 0;