2 * Copyright (C) 2004 Red Hat UK Ltd.
4 * This file is released under the GPL.
10 #include <linux/bio.h>
11 #include <linux/prefetch.h>
18 static inline int bio_list_empty(const struct bio_list
*bl
)
20 return bl
->head
== NULL
;
23 #define BIO_LIST_INIT { .head = NULL, .tail = NULL }
25 #define BIO_LIST(bl) \
26 struct bio_list bl = BIO_LIST_INIT
28 static inline void bio_list_init(struct bio_list
*bl
)
30 bl
->head
= bl
->tail
= NULL
;
33 #define bio_list_for_each(bio, bl) \
34 for (bio = (bl)->head; bio && ({ prefetch(bio->bi_next); 1; }); \
37 static inline unsigned bio_list_size(const struct bio_list
*bl
)
42 bio_list_for_each(bio
, bl
)
48 static inline void bio_list_add(struct bio_list
*bl
, struct bio
*bio
)
53 bl
->tail
->bi_next
= bio
;
60 static inline void bio_list_merge(struct bio_list
*bl
, struct bio_list
*bl2
)
66 bl
->tail
->bi_next
= bl2
->head
;
73 static inline void bio_list_merge_head(struct bio_list
*bl
,
80 bl2
->tail
->bi_next
= bl
->head
;
87 static inline struct bio
*bio_list_pop(struct bio_list
*bl
)
89 struct bio
*bio
= bl
->head
;
92 bl
->head
= bl
->head
->bi_next
;
102 static inline struct bio
*bio_list_get(struct bio_list
*bl
)
104 struct bio
*bio
= bl
->head
;
106 bl
->head
= bl
->tail
= NULL
;