Name
get_request —
get a free request
Synopsis
struct request * fsfuncget_request ( | struct request_queue * q, |
| | int rw_flags, |
| | struct bio * bio, |
| | gfp_t gfp_mask); |
Arguments
q
request_queue to allocate request from
rw_flags
RW and SYNC flags
bio
bio to allocate request for (can be NULL)
gfp_mask
allocation mask
Description
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*.