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block: Change the type of req_op() and bio_op() into enum req_op

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Improve static type checking by changing the type of the value returned by
req_op() and bio_op() from unsigned int into enum req_op. Insert
'default: break;' in switch statements on the enum req_op type to prevent
that the compiler warns about these switch statements.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220714180729.1065367-5-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2022-07-14 11:06:30 -07:00 committed by Jens Axboe
parent 86947df3a9
commit 2d9b02be73
5 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/blk-merge.c
View File

@ -405,6 +405,8 @@ unsigned int blk_recalc_rq_segments(struct request *rq)
return 1;
case REQ_OP_WRITE_ZEROES:
return 0;
default:
break;
}
rq_for_each_bvec(bv, rq, iter)

2
drivers/block/paride/pd.c
View File

@ -501,6 +501,8 @@ static enum action do_pd_io_start(void)
return do_pd_read_start();
else
return do_pd_write_start();
default:
break;
}
return Fail;
}

2
drivers/md/dm.c
View File

@ -1542,6 +1542,8 @@ static blk_status_t __process_abnormal_io(struct clone_info *ci,
case REQ_OP_WRITE_ZEROES:
num_bios = ti->num_write_zeroes_bios;
break;
default:
break;
}
/*

6
include/linux/blk-mq.h
View File

@ -198,8 +198,10 @@ struct request {
void *end_io_data;
};
#define req_op(req) \
((req)->cmd_flags & REQ_OP_MASK)
static inline enum req_op req_op(const struct request *req)
{
return req->cmd_flags & REQ_OP_MASK;
}
static inline bool blk_rq_is_passthrough(struct request *rq)
{

6
include/linux/blk_types.h
View File

@ -463,8 +463,10 @@ enum stat_group {
NR_STAT_GROUPS
};
#define bio_op(bio) \
((bio)->bi_opf & REQ_OP_MASK)
static inline enum req_op bio_op(const struct bio *bio)
{
return bio->bi_opf & REQ_OP_MASK;
}
/* obsolete, don't use in new code */
static inline void bio_set_op_attrs(struct bio *bio, unsigned op,