The double `do' is duplicated in the comment, remove one.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
---
 fs/pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/pipe.c b/fs/pipe.c
index 74ae9fafd25a..f4a070b12519 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -579,7 +579,7 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
 	__pipe_unlock(pipe);
 
 	/*
-	 * If we do do a wakeup event, we do a 'sync' wakeup, because we
+	 * If we do a wakeup event, we do a 'sync' wakeup, because we
 	 * want the reader to start processing things asap, rather than
 	 * leave the data pending.
 	 *
-- 
2.36.1