From 309f77ad9bea057d55b04580b5a711e9e3727e83 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Mon, 25 Oct 2010 15:01:12 +0900 Subject: [PATCH] fs/buffer.c: call __block_write_begin() if we have page If we have the appropriate page already, call __block_write_begin() directly instead of releasing and regrabbing it inside of block_write_begin(). Signed-off-by: Namhyung Kim Signed-off-by: Al Viro --- fs/buffer.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 74566c6f67b1..d895d9fd5b71 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2458,11 +2458,10 @@ int nobh_write_begin(struct address_space *mapping, *fsdata = NULL; if (page_has_buffers(page)) { - unlock_page(page); - page_cache_release(page); - *pagep = NULL; - return block_write_begin(mapping, pos, len, flags, pagep, - get_block); + ret = __block_write_begin(page, pos, len, get_block); + if (unlikely(ret)) + goto out_release; + return ret; } if (PageMappedToDisk(page)) -- 2.30.2