summaryrefslogtreecommitdiffstats
path: root/include/trace
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-03-03 17:50:18 -0800
committerIngo Molnar <mingo@elte.hu>2010-03-04 12:07:35 +0100
commit8d53dd546f36073e0d29b0cfc24c665db301e3e7 (patch)
tree1cd2582e669fe2ff580ddc707705e5efb18251de /include/trace
parent99ee4ca746dda71326db7645463b4075ac1d665c (diff)
downloadlinux-stable-8d53dd546f36073e0d29b0cfc24c665db301e3e7.tar.gz
linux-stable-8d53dd546f36073e0d29b0cfc24c665db301e3e7.tar.bz2
linux-stable-8d53dd546f36073e0d29b0cfc24c665db301e3e7.zip
rcu, ftrace: Fix RCU lockdep splat in ftrace_perf_buf_prepare()
Change the pair of rcu_dereference() calls in ftrace_perf_buf_prepare() to rcu_dereference_sched(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1267667418-32233-3-git-send-email-paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/ftrace.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 0804cd594803..601ad7744247 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -699,9 +699,9 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
* __cpu = smp_processor_id();
*
* if (in_nmi())
- * trace_buf = rcu_dereference(perf_trace_buf_nmi);
+ * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
* else
- * trace_buf = rcu_dereference(perf_trace_buf);
+ * trace_buf = rcu_dereference_sched(perf_trace_buf);
*
* if (!trace_buf)
* goto end;