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btrfs: use btrfsic_submit_bio instead of submit_bio in write_dev_flush 

Although this bio has no data attached, it will reach this condition
(bio->bi_opf & REQ_PREFLUSH) and then update the flush_gen of dev_state
in __btrfsic_submit_bio. So we should still submit it through integrity
checker. Otherwise, the integrity checker will throw the following warning
when I mount a newly created btrfs filesystem.

[10264.755497] btrfs: attempt to write superblock which references block M @29523968 (sdb1/1111654400/0) which is not flushed out of disk's write cache (block flush_gen=1, dev->flush_gen=0)!
[10264.755498] btrfs: attempt to write superblock which references block M @29523968 (sdb1/37912576/0) which is not flushed out of disk's write cache (block flush_gen=1, dev->flush_gen=0)!

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Lu Fengqi 2017-08-18 16:38:07 +08:00 committed by David Sterba
parent 72610b1b40
commit 43a0111103
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/disk-io.c
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@ -3517,7 +3517,7 @@ static void write_dev_flush(struct btrfs_device *device)
init_completion(&device->flush_wait);
bio->bi_private = &device->flush_wait;
submit_bio(bio);
btrfsic_submit_bio(bio);
device->flush_bio_sent = 1;
}