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block: get rid of bio_rw and READA

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These two are confusing leftover of the old world order, combining
values of the REQ_OP_ and REQ_ namespaces.  For callers that don't
special case we mostly just replace bi_rw with bio_data_dir or
op_is_write, except for the few cases where a switch over the REQ_OP_
values makes more sense.  Any check for READA is replaced with an
explicit check for REQ_RAHEAD.  Also remove the READA alias for
REQ_RAHEAD.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2016-07-19 11:28:41 +02:00
committed by Jens Axboe
parent 3f40bf2c89
commit 70246286e9
26 changed files with 95 additions and 96 deletions
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8
drivers/md/dm-raid1.c
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@@ -528,7 +528,7 @@ static void read_callback(unsigned long error, void *context)
DMWARN_LIMIT("Read failure on mirror device %s. "
"Trying alternative device.",
m->dev->name);
queue_bio(m->ms, bio, bio_rw(bio));
queue_bio(m->ms, bio, bio_data_dir(bio));
return;
}
@@ -1193,7 +1193,7 @@ static void mirror_dtr(struct dm_target *ti)
*/
static int mirror_map(struct dm_target *ti, struct bio *bio)
{
int r, rw = bio_rw(bio);
int r, rw = bio_data_dir(bio);
struct mirror *m;
struct mirror_set *ms = ti->private;
struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh);
@@ -1217,7 +1217,7 @@ static int mirror_map(struct dm_target *ti, struct bio *bio)
* If region is not in-sync queue the bio.
*/
if (!r || (r == -EWOULDBLOCK)) {
if (rw == READA)
if (bio->bi_rw & REQ_RAHEAD)
return -EWOULDBLOCK;
queue_bio(ms, bio, rw);
@@ -1242,7 +1242,7 @@ static int mirror_map(struct dm_target *ti, struct bio *bio)
static int mirror_end_io(struct dm_target *ti, struct bio *bio, int error)
{
int rw = bio_rw(bio);
int rw = bio_data_dir(bio);
struct mirror_set *ms = (struct mirror_set *) ti->private;
struct mirror *m = NULL;
struct dm_bio_details *bd = NULL;