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block: add proper helpers for elevator_type module refcount management

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Make sure we have helpers for all relevant module refcount operations on
the elevator_type in elevator.h, and use them.  Move the call to the get
helper in blk_mq_elv_switch_none a bit so that it is obvious with a less
verbose comment.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20221020064819.1469928-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2022-10-20 08:48:16 +02:00
committed by Jens Axboe
parent 671fae5e51
commit dd6f7f17bf
3 changed files with 19 additions and 16 deletions
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15
block/elevator.h
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@@ -84,6 +84,21 @@ struct elevator_type
struct list_head list;
};
static inline bool elevator_tryget(struct elevator_type *e)
{
return try_module_get(e->elevator_owner);
}
static inline void __elevator_get(struct elevator_type *e)
{
__module_get(e->elevator_owner);
}
static inline void elevator_put(struct elevator_type *e)
{
module_put(e->elevator_owner);
}
#define ELV_HASH_BITS 6
void elv_rqhash_del(struct request_queue *q, struct request *rq);