Name
__get_request —
get a free request
Synopsis
struct request * __get_request ( | struct request_list * rl, |
| int op, |
| int op_flags, |
| struct bio * bio, |
| gfp_t gfp_mask) ; |
Arguments
rl
request list to allocate 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
Description
Get a free request from q
. This function may fail under memory
pressure or if 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*.