diff options
Diffstat (limited to 'drivers/md/dm-bio-list.h')
-rw-r--r-- | drivers/md/dm-bio-list.h | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h deleted file mode 100644 index 345098b4ca77..000000000000 --- a/drivers/md/dm-bio-list.h +++ /dev/null | |||
@@ -1,117 +0,0 @@ | |||
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 | |||
12 | #ifdef CONFIG_BLOCK | ||
13 | |||
14 | struct bio_list { | ||
15 | struct bio *head; | ||
16 | struct bio *tail; | ||
17 | }; | ||
18 | |||
19 | static inline int bio_list_empty(const struct bio_list *bl) | ||
20 | { | ||
21 | return bl->head == NULL; | ||
22 | } | ||
23 | |||
24 | static inline void bio_list_init(struct bio_list *bl) | ||
25 | { | ||
26 | bl->head = bl->tail = NULL; | ||
27 | } | ||
28 | |||
29 | #define bio_list_for_each(bio, bl) \ | ||
30 | for (bio = (bl)->head; bio; bio = bio->bi_next) | ||
31 | |||
32 | static inline unsigned bio_list_size(const struct bio_list *bl) | ||
33 | { | ||
34 | unsigned sz = 0; | ||
35 | struct bio *bio; | ||
36 | |||
37 | bio_list_for_each(bio, bl) | ||
38 | sz++; | ||
39 | |||
40 | return sz; | ||
41 | } | ||
42 | |||
43 | static inline void bio_list_add(struct bio_list *bl, struct bio *bio) | ||
44 | { | ||
45 | bio->bi_next = NULL; | ||
46 | |||
47 | if (bl->tail) | ||
48 | bl->tail->bi_next = bio; | ||
49 | else | ||
50 | bl->head = bio; | ||
51 | |||
52 | bl->tail = bio; | ||
53 | } | ||
54 | |||
55 | static inline void bio_list_add_head(struct bio_list *bl, struct bio *bio) | ||
56 | { | ||
57 | bio->bi_next = bl->head; | ||
58 | |||
59 | bl->head = bio; | ||
60 | |||
61 | if (!bl->tail) | ||
62 | bl->tail = bio; | ||
63 | } | ||
64 | |||
65 | static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2) | ||
66 | { | ||
67 | if (!bl2->head) | ||
68 | return; | ||
69 | |||
70 | if (bl->tail) | ||
71 | bl->tail->bi_next = bl2->head; | ||
72 | else | ||
73 | bl->head = bl2->head; | ||
74 | |||
75 | bl->tail = bl2->tail; | ||
76 | } | ||
77 | |||
78 | static inline void bio_list_merge_head(struct bio_list *bl, | ||
79 | struct bio_list *bl2) | ||
80 | { | ||
81 | if (!bl2->head) | ||
82 | return; | ||
83 | |||
84 | if (bl->head) | ||
85 | bl2->tail->bi_next = bl->head; | ||
86 | else | ||
87 | bl->tail = bl2->tail; | ||
88 | |||
89 | bl->head = bl2->head; | ||
90 | } | ||
91 | |||
92 | static inline struct bio *bio_list_pop(struct bio_list *bl) | ||
93 | { | ||
94 | struct bio *bio = bl->head; | ||
95 | |||
96 | if (bio) { | ||
97 | bl->head = bl->head->bi_next; | ||
98 | if (!bl->head) | ||
99 | bl->tail = NULL; | ||
100 | |||
101 | bio->bi_next = NULL; | ||
102 | } | ||
103 | |||
104 | return bio; | ||
105 | } | ||
106 | |||
107 | static inline struct bio *bio_list_get(struct bio_list *bl) | ||
108 | { | ||
109 | struct bio *bio = bl->head; | ||
110 | |||
111 | bl->head = bl->tail = NULL; | ||
112 | |||
113 | return bio; | ||
114 | } | ||
115 | |||
116 | #endif /* CONFIG_BLOCK */ | ||
117 | #endif | ||