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rcutorture: Fix rcu_torture_cbflood() for callback-free RCU 

The rcu_torture_cbflood() function correctly checks for flavors of
RCU that lack analogs to call_rcu() and rcu_barrier(), but in that
case it fails to terminate correctly.  In fact, it terminates so
incorrectly that segfaults can result.  This commit therefore causes
rcu_torture_cbflood() to do the proper wait-for-stop procedure.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2015-06-22 18:11:31 -07:00
parent e8e255f719
commit 3a0af33341
1 changed files with 2 additions and 3 deletions
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5
kernel/rcu/rcutorture.c
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@ -823,9 +823,7 @@ rcu_torture_cbflood(void *arg)
}
if (err) {
VERBOSE_TOROUT_STRING("rcu_torture_cbflood disabled: Bad args or OOM");
while (!torture_must_stop())
schedule_timeout_interruptible(HZ);
return 0;
goto wait_for_stop;
}
VERBOSE_TOROUT_STRING("rcu_torture_cbflood task started");
do {
@ -844,6 +842,7 @@ rcu_torture_cbflood(void *arg)
stutter_wait("rcu_torture_cbflood");
} while (!torture_must_stop());
vfree(rhp);
wait_for_stop:
torture_kthread_stopping("rcu_torture_cbflood");
return 0;
}