From 414b42553f9cdfce4982ff1de0007b3dfc78f80a Mon Sep 17 00:00:00 2001
From: Steven Rostedt <rostedt@goodmis.org>
Date: Mon, 12 May 2008 21:20:56 +0200
Subject: [PATCH] --- yaml --- r: 100507 b: refs/heads/master c:
 30afdcb1de0a37a2086145a82ca3febebe47d019 h: refs/heads/master i:   100505:
 d80b181073064995f70dd200206c686d046f3990   100503:
 aabed4192936acd46129f5b9c5db480af321d9cf v: v3

---
 [refs]                              |  2 +-
 trunk/kernel/trace/trace_selftest.c | 10 +++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index 9beb978dea7b..e7fb4ed30cb2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d15f57f23eaba975309a153b23699cd0c0236974
+refs/heads/master: 30afdcb1de0a37a2086145a82ca3febebe47d019
diff --git a/trunk/kernel/trace/trace_selftest.c b/trunk/kernel/trace/trace_selftest.c
index 83e55a2000cc..395274e783b3 100644
--- a/trunk/kernel/trace/trace_selftest.c
+++ b/trunk/kernel/trace/trace_selftest.c
@@ -82,10 +82,12 @@ trace_test_buffer_cpu(struct trace_array *tr, struct trace_array_cpu *data)
  */
 static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
 {
-	unsigned long cnt = 0;
-	int cpu;
-	int ret = 0;
+	unsigned long flags, cnt = 0;
+	int cpu, ret = 0;
 
+	/* Don't allow flipping of max traces now */
+	raw_local_irq_save(flags);
+	__raw_spin_lock(&ftrace_max_lock);
 	for_each_possible_cpu(cpu) {
 		if (!head_page(tr->data[cpu]))
 			continue;
@@ -96,6 +98,8 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
 		if (ret)
 			break;
 	}
+	__raw_spin_unlock(&ftrace_max_lock);
+	raw_local_irq_restore(flags);
 
 	if (count)
 		*count = cnt;