Commit 43b62ce3 authored by Mike Christie's avatar Mike Christie Committed by Jens Axboe
Browse files

block: move bio io prio to a new field



In the next patch, we move drop the compat code and make
the op a separate value that is hidden in bi_rw. To give
the op and rq bits flags room to grow this moves prio to
its own field.
Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 8e45c6f8
......@@ -47,18 +47,8 @@
#define bio_op(bio) (op_from_rq_bits((bio)->bi_rw))
#define bio_set_op_attrs(bio, op, flags) ((bio)->bi_rw |= (op | flags))
/*
* 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
......
......@@ -48,9 +48,8 @@ struct bio {
struct block_device *bi_bdev;
unsigned int bi_flags; /* status, command, etc */
int bi_error;
unsigned long bi_rw; /* bottom bits READ/WRITE,
* top bits priority
*/
unsigned long bi_rw; /* READ/WRITE */
unsigned short bi_ioprio;
struct bvec_iter bi_iter;
......
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