centos man page for __get_request

__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 rw_flags, struct bio * bio, gfp_t gfp_mask);

ARGUMENTS
       rl
	   request list to allocate 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*.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  __GET_REQUEST(9)