diff options
| -rw-r--r-- | kernel/trace/ring_buffer.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 424129eb20a4..03ed52b67db3 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1290,9 +1290,8 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer, rb_event_set_padding(event); } - if (tail <= BUF_PAGE_SIZE) - /* Set the write back to the previous setting */ - local_set(&tail_page->write, tail); + /* Set the write back to the previous setting */ + local_sub(length, &tail_page->write); /* * If this was a commit entry that failed, @@ -1311,8 +1310,7 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer, out_reset: /* reset write */ - if (tail <= BUF_PAGE_SIZE) - local_set(&tail_page->write, tail); + local_sub(length, &tail_page->write); if (likely(lock_taken)) __raw_spin_unlock(&cpu_buffer->lock); |