block: move bio list helpers into bio.h

It's used by DM and MD and generally useful, so move the bio list
helpers into bio.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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 @@
-/*
- * Copyright (C) 2004 Red Hat UK Ltd.
- *
- * This file is released under the GPL.
- */
-
-#ifndef DM_BIO_LIST_H
-#define DM_BIO_LIST_H
-
-#include <linux/bio.h>
-
-#ifdef CONFIG_BLOCK
-
-struct bio_list {
-        struct bio *head;
-        struct bio *tail;
-};
-
-static inline int bio_list_empty(const struct bio_list *bl)
-{
-        return bl->head == NULL;
-}
-
-static inline void bio_list_init(struct bio_list *bl)
-{
-        bl->head = bl->tail = NULL;
-}
-
-#define bio_list_for_each(bio, bl) \
-        for (bio = (bl)->head; bio; bio = bio->bi_next)
-
-static inline unsigned bio_list_size(const struct bio_list *bl)
-{
-        unsigned sz = 0;
-        struct bio *bio;
-
-        bio_list_for_each(bio, bl)
-                sz++;
-
-        return sz;
-}
-
-static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
-{
-        bio->bi_next = NULL;
-
-        if (bl->tail)
-                bl->tail->bi_next = bio;
-        else
-                bl->head = 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)
-                return;
-
-        if (bl->tail)
-                bl->tail->bi_next = bl2->head;
-        else
-                bl->head = bl2->head;
-
-        bl->tail = bl2->tail;
-}
-
-static inline void bio_list_merge_head(struct bio_list *bl,
-                                       struct bio_list *bl2)
-{
-        if (!bl2->head)
-                return;
-
-        if (bl->head)
-                bl2->tail->bi_next = bl->head;
-        else
-                bl->tail = bl2->tail;
-
-        bl->head = bl2->head;
-}
-
-static inline struct bio *bio_list_pop(struct bio_list *bl)
-{
-        struct bio *bio = bl->head;
-
-        if (bio) {
-                bl->head = bl->head->bi_next;
-                if (!bl->head)
-                        bl->tail = NULL;
-
-                bio->bi_next = NULL;
-        }
-
-        return bio;
-}
-
-static inline struct bio *bio_list_get(struct bio_list *bl)
-{
-        struct bio *bio = bl->head;
-
-        bl->head = bl->tail = NULL;
-
-        return bio;
-}
-
-#endif /* CONFIG_BLOCK */
-#endif