From: Fan Li <fanofcode.li@samsung.com>
Date: Tue, 4 Aug 2015 05:27:51 +0000 (+0800)
Subject: f2fs: change the timing of f2fs_wait_on_page_writeback
X-Git-Tag: v4.3-rc1~91^2~43
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5768dcdd7f7675f9540e648428c8a1cd7208a0fe;p=karo-tx-linux.git

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 e4081fc91012..2692848e7f75 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1383,13 +1383,13 @@ put_next:
 	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;