get_request9
Get a free request
Usage
struct request * get_request(struct request_queue * q, int op, int op_flags, struct bio * bio, gfp_t gfp_mask);
Arguments
q
request_queue to allocate request from
op
REQ_OP_READ/REQ_OP_WRITE
op_flags
rq_flag_bits
bio
bio to allocate request for (can be NULL)
gfp_mask
allocation mask
Overview
Get a free request from q. If __GFP_DIRECT_RECLAIM is set in gfp_mask, this function keeps retrying under memory pressure and fails iff q is dead.
Must be called with q->queue_lock held and, Returns ERR_PTR on failure, with q->queue_lock held. Returns request pointer on success, with q->queue_lock *not held*.
Releases
3 releases since Debian 7 (Wheezy); the text changed 2 times.