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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2004 Red Hat UK Ltd.
3 *
4 * This file is released under the GPL.
5 */
6
7#ifndef DM_BIO_LIST_H
8#define DM_BIO_LIST_H
9
10#include <linux/bio.h>
11
12struct bio_list {
13 struct bio *head;
14 struct bio *tail;
15};
16
17static inline void bio_list_init(struct bio_list *bl)
18{
19 bl->head = bl->tail = NULL;
20}
21
22static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
23{
24 bio->bi_next = NULL;
25
26 if (bl->tail)
27 bl->tail->bi_next = bio;
28 else
29 bl->head = bio;
30
31 bl->tail = bio;
32}
33
34static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2)
35{
36 if (bl->tail)
37 bl->tail->bi_next = bl2->head;
38 else
39 bl->head = bl2->head;
40
41 bl->tail = bl2->tail;
42}
43
44static inline struct bio *bio_list_pop(struct bio_list *bl)
45{
46 struct bio *bio = bl->head;
47
48 if (bio) {
49 bl->head = bl->head->bi_next;
50 if (!bl->head)
51 bl->tail = NULL;
52
53 bio->bi_next = NULL;
54 }
55
56 return bio;
57}
58
59static inline struct bio *bio_list_get(struct bio_list *bl)
60{
61 struct bio *bio = bl->head;
62
63 bl->head = bl->tail = NULL;
64
65 return bio;
66}
67
68#endif