From 8f3d8ba20e67991b531e9c0227dcd1f99271a32c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 7 Apr 2009 19:55:13 +0200 Subject: 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 Acked-by: Alasdair G Kergon Signed-off-by: Jens Axboe --- drivers/md/dm-bio-list.h | 117 ----------------------------------------------- 1 file changed, 117 deletions(-) delete mode 100644 drivers/md/dm-bio-list.h (limited to 'drivers/md/dm-bio-list.h') diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h deleted file mode 100644 index 345098b4ca7..00000000000 --- 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 - -#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 -- cgit v1.2.3