f2fs: change the timing of f2fs_wait_on_page_writeback
some backing devices need pages to be stable during writeback. It doesn't
matter if
the page is completely overwritten or already uptodate, it needs to wait
before write.
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e4081fc..2692848e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1383,13 +1383,13 @@
f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi);
+ f2fs_wait_on_page_writeback(page, DATA);
+
if (len == PAGE_CACHE_SIZE)
goto out_update;
if (PageUptodate(page))
goto out_clear;
- f2fs_wait_on_page_writeback(page, DATA);
-
if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) {
unsigned start = pos & (PAGE_CACHE_SIZE - 1);
unsigned end = start + len;