Btrfs: use the new helper wbc_to_write_flags

This updates btrfs to use the helper wbc_to_write_flags which has been
applied in ext4/xfs/f2fs/block.

Please note that, with this, btrfs's dirty pages written by a
writeback job will carry the flag REQ_BACKGROUND, which is currently
used by writeback-throttle to determine whether it should go to get a
request or wait.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d17783d..4ead6da 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3471,8 +3471,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
        unsigned int write_flags = 0;
        unsigned long nr_written = 0;
 
-       if (wbc->sync_mode == WB_SYNC_ALL)
-               write_flags = REQ_SYNC;
+       write_flags = wbc_to_write_flags(wbc);
 
        trace___extent_writepage(page, inode, wbc);
 
@@ -3718,7 +3717,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
        unsigned long i, num_pages;
        unsigned long bio_flags = 0;
        unsigned long start, end;
-       unsigned int write_flags = (epd->sync_io ? REQ_SYNC : 0) | REQ_META;
+       unsigned int write_flags = wbc_to_write_flags(wbc) | REQ_META;
        int ret = 0;
 
        clear_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags);