trace: set max latency variable to zero on default

[safe/jmp/linux-2.6] / kernel / trace / ring_buffer.c

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 1d65263..9c1e73d 100644 (file)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1025,12 +1025,8 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
                }
 
                if (next_page == head_page) {
-                       if (!(buffer->flags & RB_FL_OVERWRITE)) {
-                               /* reset write */
-                               if (tail <= BUF_PAGE_SIZE)
-                                       local_set(&tail_page->write, tail);
+                       if (!(buffer->flags & RB_FL_OVERWRITE))
                                goto out_unlock;
-                       }
 
                        /* tail_page has not moved yet? */
                        if (tail_page == cpu_buffer->tail_page) {
@@ -1105,6 +1101,10 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
        return event;
 
  out_unlock:
+       /* reset write */
+       if (tail <= BUF_PAGE_SIZE)
+               local_set(&tail_page->write, tail);
+
        __raw_spin_unlock(&cpu_buffer->lock);
        local_irq_restore(flags);
        return NULL;