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Subject[RESEND PATCH] fs/buffer.c: exit if already confirmed page has dirty and writeback buffers
Stop the loop of iterating bh if we have confirmed page
has dirty and writeback buffers.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
---
fs/buffer.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 6024877..519cc5c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -112,7 +112,7 @@ void buffer_check_dirty_writeback(struct page *page,
*dirty = true;

bh = bh->b_this_page;
- } while (bh != head);
+ } while ((bh != head) && !(*writeback && *dirty));
}
EXPORT_SYMBOL(buffer_check_dirty_writeback);

--
1.7.7


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