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[PATCH] device-mapper snapshot: bio_list fix

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bio_list_merge() should do nothing if the second list is empty - not oops.

Signed-off-by: Alasdair G Kergon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
[email protected] 2005-11-21 21:32:36 -08:00 • committed by Linus Torvalds
commit 233886dd32
1 changed files with 3 additions and 0 deletions
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3
drivers/md/dm-bio-list.h
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@ -33,6 +33,9 @@ static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2)
{
if (!bl2->head)
return;
if (bl->tail)
bl->tail->bi_next = bl2->head;
else