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 <namhyung@xxxxxxxxx>
---
fs/buffer.c | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index 7f0b9b0..d4b3ada 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2466,11 +2466,10 @@ 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))
+ *pagep = NULL;
+ return ret;
}
if (PageMappedToDisk(page))
--
1.7.0.4
--
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