From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri, 31 Jan 2014 01:06:30 +0000 (-0800)
Subject: rcutorture: Add diagnostic for unscheduled system shutdown
X-Git-Tag: firefly_0821_release~176^2~4237^2~1^2^2~25
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fac480efcba6a9f0aea91947f151fd569538b0af;p=firefly-linux-kernel-4.4.55.git

rcutorture: Add diagnostic for unscheduled system shutdown

Currently, rcutorture can terminate via rmmod, via self-shutdown,
via something else shutting the system down, or of course the usual
catastrophic termination.  The first two get flagged, so this commit adds
a message for the third.  For the fourth, your warranty is void as always.

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

diff --git a/kernel/torture.c b/kernel/torture.c
index ed360cf948da..d51de3029a5c 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -438,10 +438,12 @@ static int torture_shutdown_notify(struct notifier_block *unused1,
 				   unsigned long unused2, void *unused3)
 {
 	mutex_lock(&fullstop_mutex);
-	if (fullstop == FULLSTOP_DONTSTOP)
+	if (fullstop == FULLSTOP_DONTSTOP) {
+		VERBOSE_TOROUT_STRING("Unscheduled system shutdown detected");
 		fullstop = FULLSTOP_SHUTDOWN;
-	else
+	} else {
 		pr_warn("Concurrent rmmod and shutdown illegal!\n");
+	}
 	mutex_unlock(&fullstop_mutex);
 	return NOTIFY_DONE;
 }