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block: optimize blk_queue_zoned_model for !CONFIG_BLK_DEV_ZONED 

Always return BLK_ZONED_NONE if zoned device support is not enabled.
This allows various compiler optimizations including the dead code
elimination that we so like for avoiding ifdefs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Christoph Hellwig 2020-08-20 09:56:58 +02:00
parent 1401fcc4e3
commit 6fcd669514
1 changed files with 3 additions and 1 deletions
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4
include/linux/blkdev.h
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@ -692,7 +692,9 @@ static inline bool queue_is_mq(struct request_queue *q)
static inline enum blk_zoned_model
blk_queue_zoned_model(struct request_queue *q)
{
return q->limits.zoned;
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED))
return q->limits.zoned;
return BLK_ZONED_NONE;
}
static inline bool blk_queue_is_zoned(struct request_queue *q)