__GET_REQUEST(9)                          Block Devices                          __GET_REQUEST(9)



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*.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                          __GET_REQUEST(9)