[PATCH 5/6] ocfs2: Wait for page writeback to provide stable pages

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When stable pages are required, we have to wait if the page is just
going to disk and we want to modify it. Add proper callback to
ocfs2_grab_pages_for_write().

CC: ocfs2-devel@xxxxxxxxxxxxxx
CC: Joel Becker <jlbec@xxxxxxxxxxxx>
CC: Mark Fasheh <mfasheh@xxxxxxxx>
From: Jan Kara <jack@xxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/ocfs2/aops.c |    1 +
 1 file changed, 1 insertion(+)


diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 6577432..9796330 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1194,6 +1194,7 @@ static int ocfs2_grab_pages_for_write(struct address_space *mapping,
 				goto out;
 			}
 		}
+		wait_for_stable_page(wc->w_pages[i]);
 
 		if (index == target_index)
 			wc->w_target_page = wc->w_pages[i];

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