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-rw-r--r--kernel/trace/ring_buffer.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 424129eb20a..03ed52b67db 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);