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| GET_REQUEST(9) | Block Devices | GET_REQUEST(9) |
NAME¶
get_request - get a free request
SYNOPSIS¶
struct request * get_request(struct request_queue * q, unsigned int op, struct bio * bio, gfp_t gfp_mask);
ARGUMENTS¶
q
request_queue to allocate request from
op
operation and flags
bio
bio to allocate request for (can be NULL)
gfp_mask
allocation mask
DESCRIPTION¶
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*.
COPYRIGHT¶
| March 2017 | Kernel Hackers Manual 4.10 |