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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-01-31 16:46:34 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-02-21 09:06:09 -0800
commit7129d383d9f46eb8276bee5fb46df63f09a70130 (patch)
treee2570ffb2f2146d2b6a87ff3505e9c9d824c3a6c /kernel/rcutorture.c
parent236fefafe5d3d34b78ed2ccf5510909716112326 (diff)
downloadlinux-7129d383d9f46eb8276bee5fb46df63f09a70130.tar.bz2
rcu: Trace only after NULL-pointer check
Fix a bonehead error introduced when adding event tracing to rcutorture. Move the traces to follow the NULL-pointer checks. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutorture.c')
-rw-r--r--kernel/rcutorture.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 5cfa23be43bd..ed1c72bd9c09 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -1000,12 +1000,12 @@ static void rcu_torture_timer(unsigned long unused)
rcu_read_lock_bh_held() ||
rcu_read_lock_sched_held() ||
srcu_read_lock_held(&srcu_ctl));
- do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu);
if (p == NULL) {
/* Leave because rcu_torture_writer is not yet underway */
cur_ops->readunlock(idx);
return;
}
+ do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu);
if (p->rtort_mbtest == 0)
atomic_inc(&n_rcu_torture_mberror);
spin_lock(&rand_lock);
@@ -1063,13 +1063,13 @@ rcu_torture_reader(void *arg)
rcu_read_lock_bh_held() ||
rcu_read_lock_sched_held() ||
srcu_read_lock_held(&srcu_ctl));
- do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu);
if (p == NULL) {
/* Wait for rcu_torture_writer to get underway */
cur_ops->readunlock(idx);
schedule_timeout_interruptible(HZ);
continue;
}
+ do_trace_rcu_torture_read(cur_ops->name, &p->rtort_rcu);
if (p->rtort_mbtest == 0)
atomic_inc(&n_rcu_torture_mberror);
cur_ops->read_delay(&rand);