diff options
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index d82ef4fd545c..dce12a0efdea 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1395,6 +1395,26 @@ int submit_bio_wait(struct bio *bio) } EXPORT_SYMBOL(submit_bio_wait); +static void bio_wait_end_io(struct bio *bio) +{ + complete(bio->bi_private); + bio_put(bio); +} + +/* + * bio_await_chain - ends @bio and waits for every chained bio to complete + */ +void bio_await_chain(struct bio *bio) +{ + DECLARE_COMPLETION_ONSTACK_MAP(done, + bio->bi_bdev->bd_disk->lockdep_map); + + bio->bi_private = &done; + bio->bi_end_io = bio_wait_end_io; + bio_endio(bio); + blk_wait_io(&done); +} + void __bio_advance(struct bio *bio, unsigned bytes) { if (bio_integrity(bio)) |