diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_selftest.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c index 83e55a2000c..395274e783b 100644 --- a/kernel/trace/trace_selftest.c +++ b/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; |