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 ed360cf948da97051cb462ee9dccea17b2a2fdf4..d51de3029a5c495273647e207fa39f2f2df904d3 100644 (file)
--- 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;
 }