[PATCH 3/8] writeback: use WRITE_BG for kupdate and background writeback

[Jens Axboe]

If we're doing background type writes, then use the appropriate
write command for that.

Signed-off-by: Jens Axboe <ax...@fb.com>
---
 include/linux/writeback.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index e1fc25172397..7fb80c78f159 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -104,6 +104,8 @@ static inline int wbc_to_write_flags(struct 
writeback_control *wbc)
 {
        if (wbc->sync_mode == WB_SYNC_ALL)
                return WRITE_SYNC;
+       else if (wbc->for_kupdate || wbc->for_background)
+               return WRITE_BG;
 
        return WRITE;
 }
-- 
2.7.4