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block: Introduce blk_get_request_flags()

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A side effect of this patch is that the GFP mask that is passed to
several allocation functions in the legacy block layer is changed
from GFP_KERNEL into __GFP_DIRECT_RECLAIM.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Martin Steigerwald <martin@lichtvoll.de>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2017-11-09 10:49:54 -08:00 • committed by Jens Axboe
parent 055f6e18e0
commit 6a15674d1e
2 changed files with 38 additions and 15 deletions
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3
include/linux/blkdev.h
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@ -927,6 +927,9 @@ extern void blk_rq_init(struct request_queue *q, struct request *rq);
extern void blk_init_request_from_bio(struct request *req, struct bio *bio);
extern void blk_put_request(struct request *);
extern void __blk_put_request(struct request_queue *, struct request *);
extern struct request *blk_get_request_flags(struct request_queue *,
unsigned int op,
unsigned int flags);
extern struct request *blk_get_request(struct request_queue *, unsigned int op,
gfp_t gfp_mask);
extern void blk_requeue_request(struct request_queue *, struct request *);