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block: factor out chained bio completion 

Factor common code between bio_chain_endio and bio_endio into a common
helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2016-03-11 17:34:51 +01:00 committed by Jens Axboe
parent af3e3a5259
commit 38f8baae89
1 changed files with 8 additions and 8 deletions
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16
block/bio.c
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@ -296,14 +296,19 @@ void bio_reset(struct bio *bio)
}
EXPORT_SYMBOL(bio_reset);
static void bio_chain_endio(struct bio *bio)
static struct bio *__bio_chain_endio(struct bio *bio)
{
struct bio *parent = bio->bi_private;
if (!parent->bi_error)
parent->bi_error = bio->bi_error;
bio_endio(parent);
bio_put(bio);
return parent;
}
static void bio_chain_endio(struct bio *bio)
{
bio_endio(__bio_chain_endio(bio));
}
/*
@ -1753,12 +1758,7 @@ void bio_endio(struct bio *bio)
* pointers also disables gcc's sibling call optimization.
*/
if (bio->bi_end_io == bio_chain_endio) {
struct bio *parent = bio->bi_private;
if (!parent->bi_error)
parent->bi_error = bio->bi_error;
bio_put(bio);
bio = parent;
bio = __bio_chain_endio(bio);
} else {
if (bio->bi_end_io)
bio->bi_end_io(bio);