__get_request (9)

struct request * __get_request(struct request_list * rl, int rw_flags, struct bio * bio, gfp_t gfp_mask);

rl

request list to allocate from

rw_flags

RW and SYNC flags

bio

bio to allocate request for (can be NULL)

gfp_mask

allocation mask

Get a free request from q. This function may fail under memory pressure or if q is dead.

Must be callled with q->queue_lock held and, Returns NULL on failure, with q->queue_lock held. Returns !NULL on success, with q->queue_lock *not held*.