UPSTREAM: PCI: rockchip: Provide captured slot power limit and scale

[firefly-linux-kernel-4.4.55.git] / include / linux / bio.h

diff --git a/include/linux/bio.h b/include/linux/bio.h
index b9b6e046b52ea5b9f783b69274fbdd6ac8fe5d23..42e4e3cbb001951dd7a52dfd4b0b0857db4f93bf 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -310,6 +310,38 @@ static inline void bio_clear_flag(struct bio *bio, unsigned int bit)
        bio->bi_flags &= ~(1U << bit);
 }
 
+static inline void bio_get_first_bvec(struct bio *bio, struct bio_vec *bv)
+{
+       *bv = bio_iovec(bio);
+}
+
+static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv)
+{
+       struct bvec_iter iter = bio->bi_iter;
+       int idx;
+
+       if (unlikely(!bio_multiple_segments(bio))) {
+               *bv = bio_iovec(bio);
+               return;
+       }
+
+       bio_advance_iter(bio, &iter, iter.bi_size);
+
+       if (!iter.bi_bvec_done)
+               idx = iter.bi_idx - 1;
+       else    /* in the middle of bvec */
+               idx = iter.bi_idx;
+
+       *bv = bio->bi_io_vec[idx];
+
+       /*
+        * iter.bi_bvec_done records actual length of the last bvec
+        * if this bio ends in the middle of one io vector
+        */
+       if (iter.bi_bvec_done)
+               bv->bv_len = iter.bi_bvec_done;
+}
+
 enum bip_flags {
        BIP_BLOCK_INTEGRITY     = 1 << 0, /* block layer owns integrity data */
        BIP_MAPPED_INTEGRITY    = 1 << 1, /* ref tag has been remapped */
@@ -495,11 +527,14 @@ extern unsigned int bvec_nr_vecs(unsigned short idx);
 int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
 int bio_associate_current(struct bio *bio);
 void bio_disassociate_task(struct bio *bio);
+void bio_clone_blkcg_association(struct bio *dst, struct bio *src);
 #else  /* CONFIG_BLK_CGROUP */
 static inline int bio_associate_blkcg(struct bio *bio,
                        struct cgroup_subsys_state *blkcg_css) { return 0; }
 static inline int bio_associate_current(struct bio *bio) { return -ENOENT; }
 static inline void bio_disassociate_task(struct bio *bio) { }
+static inline void bio_clone_blkcg_association(struct bio *dst,
+                       struct bio *src) { }
 #endif /* CONFIG_BLK_CGROUP */
 
 #ifdef CONFIG_HIGHMEM