block: simplify and cleanup bvec pool handling

[karo-tx-linux.git] / include / linux / bio.h

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 9faebf7f9a33c04a73506e7e379432ce1cce93bf..141cfa95a185519f61c57b331c068d6e1958e091 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -44,18 +44,8 @@
 #define BIO_MAX_SIZE           (BIO_MAX_PAGES << PAGE_SHIFT)
 #define BIO_MAX_SECTORS                (BIO_MAX_SIZE >> 9)
 
-/*
- * upper 16 bits of bi_rw define the io priority of this bio
- */
-#define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS)
-#define bio_prio(bio)  ((bio)->bi_rw >> BIO_PRIO_SHIFT)
-#define bio_prio_valid(bio)    ioprio_valid(bio_prio(bio))
-
-#define bio_set_prio(bio, prio)                do {                    \
-       WARN_ON(prio >= (1 << IOPRIO_BITS));                    \
-       (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1);          \
-       (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT);     \
-} while (0)
+#define bio_prio(bio)                  (bio)->bi_ioprio
+#define bio_set_prio(bio, prio)                ((bio)->bi_ioprio = prio)
 
 /*
  * various member access, note that bio_data should of course not be used
@@ -106,18 +96,23 @@ static inline bool bio_has_data(struct bio *bio)
 {
        if (bio &&
            bio->bi_iter.bi_size &&
-           !(bio->bi_rw & REQ_DISCARD))
+           bio_op(bio) != REQ_OP_DISCARD)
                return true;
 
        return false;
 }
 
+static inline bool bio_no_advance_iter(struct bio *bio)
+{
+       return bio_op(bio) == REQ_OP_DISCARD || bio_op(bio) == REQ_OP_WRITE_SAME;
+}
+
 static inline bool bio_is_rw(struct bio *bio)
 {
        if (!bio_has_data(bio))
                return false;
 
-       if (bio->bi_rw & BIO_NO_ADVANCE_ITER_MASK)
+       if (bio_no_advance_iter(bio))
                return false;
 
        return true;
@@ -225,7 +220,7 @@ static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter,
 {
        iter->bi_sector += bytes >> 9;
 
-       if (bio->bi_rw & BIO_NO_ADVANCE_ITER_MASK)
+       if (bio_no_advance_iter(bio))
                iter->bi_size -= bytes;
        else
                bvec_iter_advance(bio->bi_io_vec, iter, bytes);
@@ -253,10 +248,10 @@ static inline unsigned bio_segments(struct bio *bio)
         * differently:
         */
 
-       if (bio->bi_rw & REQ_DISCARD)
+       if (bio_op(bio) == REQ_OP_DISCARD)
                return 1;
 
-       if (bio->bi_rw & REQ_WRITE_SAME)
+       if (bio_op(bio) == REQ_OP_WRITE_SAME)
                return 1;
 
        bio_for_each_segment(bv, bio, iter)
@@ -473,7 +468,7 @@ static inline void bio_io_error(struct bio *bio)
 struct request_queue;
 extern int bio_phys_segments(struct request_queue *, struct bio *);
 
-extern int submit_bio_wait(int rw, struct bio *bio);
+extern int submit_bio_wait(struct bio *bio);
 extern void bio_advance(struct bio *, unsigned);
 
 extern void bio_init(struct bio *);
@@ -720,8 +715,6 @@ static inline void bio_inc_remaining(struct bio *bio)
  * and the bvec_slabs[].
  */
 #define BIO_POOL_SIZE 2
-#define BIOVEC_NR_POOLS 6
-#define BIOVEC_MAX_IDX (BIOVEC_NR_POOLS - 1)
 
 struct bio_set {
        struct kmem_cache *bio_slab;