From: Mikulas Patocka <mpatocka@redhat.com>
Date: Thu, 2 Apr 2009 18:55:36 +0000 (+0100)
Subject: dm: bio list add bio_list_add_head
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=99c75e3130cff0c869c657ee97fb4a68958eeffc;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h
index d4509be0fe67..345098b4ca77 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)