1 files changed, 23 insertions, 1 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 23d29b39f71e..d0eb659fa733 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -300,6 +300,29 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv)
                 bv->bv_len = iter.bi_bvec_done;
 }
 
+static inline unsigned bio_pages_all(struct bio *bio)
+{
+        WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
+        return bio->bi_vcnt;
+}
+
+static inline struct bio_vec *bio_first_bvec_all(struct bio *bio)
+{
+        WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
+        return bio->bi_io_vec;
+}
+
+static inline struct page *bio_first_page_all(struct bio *bio)
+{
+        return bio_first_bvec_all(bio)->bv_page;
+}
+
+static inline struct bio_vec *bio_last_bvec_all(struct bio *bio)
+{
+        WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
+        return &bio->bi_io_vec[bio->bi_vcnt - 1];
+}
+
 enum bip_flags {
         BIP_BLOCK_INTEGRITY     = 1 << 0, /* block layer owns integrity data */
         BIP_MAPPED_INTEGRITY    = 1 << 1, /* ref tag has been remapped */
@@ -477,7 +500,6 @@ static inline void bio_flush_dcache_pages(struct bio *bi)
 #endif
 
 extern void bio_copy_data(struct bio *dst, struct bio *src);
-extern int bio_alloc_pages(struct bio *bio, gfp_t gfp);
 extern void bio_free_pages(struct bio *bio);
 
 extern struct bio *bio_copy_user_iov(struct request_queue *,