[SCSI] aacraid: add SCSI SYNCHONIZE_CACHE range checking

[pandora-kernel.git] / drivers / md / dm-bio-list.h

diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h
index bbf4615..16ee3b0 100644 (file)
--- a/drivers/md/dm-bio-list.h
+++ b/drivers/md/dm-bio-list.h
@@ -14,11 +14,35 @@ struct bio_list {
        struct bio *tail;
 };
 
+static inline int bio_list_empty(const struct bio_list *bl)
+{
+       return bl->head == NULL;
+}
+
+#define BIO_LIST_INIT { .head = NULL, .tail = NULL }
+
+#define BIO_LIST(bl) \
+       struct bio_list bl = BIO_LIST_INIT
+
 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;
@@ -44,6 +68,20 @@ static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2)
        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;