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authorMikulas Patocka <mpatocka@redhat.com>2009-04-02 19:55:36 +0100
committerAlasdair G Kergon <agk@redhat.com>2009-04-02 19:55:36 +0100
commit99c75e3130cff0c869c657ee97fb4a68958eeffc (patch)
treecd3aaee7a0aeab15a3cc345046ef2020e62f21cd /drivers/md/dm-bio-list.h
parenta32079ce17899192a7b98a42753be467605a8b2f (diff)
dm: bio list add bio_list_add_head
Introduce a function that adds a bio to the head of the list for use by the patch that will support barriers. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-bio-list.h')
-rw-r--r--drivers/md/dm-bio-list.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h
index d4509be0fe6..345098b4ca7 100644
--- a/drivers/md/dm-bio-list.h
+++ b/drivers/md/dm-bio-list.h
@@ -52,6 +52,16 @@ static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
bl->tail = bio;
}
+static inline void bio_list_add_head(struct bio_list *bl, struct bio *bio)
+{
+ bio->bi_next = bl->head;
+
+ bl->head = bio;
+
+ if (!bl->tail)
+ bl->tail = bio;
+}
+
static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2)
{
if (!bl2->head)