blk_queue_prep_rq(9) [suse man page]

BLK_QUEUE_PREP_RQ(9)						   Block Devices					      BLK_QUEUE_PREP_RQ(9)

NAME

       blk_queue_prep_rq - set a prepare_request function for queue

SYNOPSIS

       void blk_queue_prep_rq(struct request_queue * q, prep_rq_fn * pfn);

ARGUMENTS

       q
	   queue

       pfn
	   prepare_request function

DESCRIPTION

       It's possible for a queue to register a prepare_request callback which is invoked before the request is handed to the request_fn. The goal
       of the function is to prepare a request for I/O, it can be used to build a cdb from the request data for instance.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010						      BLK_QUEUE_PREP_RQ(9)

mq_close(2)							System Calls Manual						       mq_close(2)

NAME

       mq_close - close a message queue descriptor

SYNOPSIS

DESCRIPTION

       The  system  call  removes  the	association  between  the  message queue descriptor, mqdes, and a message queue. Use of this message queue
       descriptor by the process, after a successful return from this and until this descriptor is returned by a subsequent  will  result  in  the
       failure of message queue system calls, with set to

       If  the	process  has a registered notification request with the message queue associated with this mqdes, the registration is canceled and
       the queue becomes available for another process to register a notification request.

       If the message queue has been unlinked and mqdes is the only existing open descriptor for the queue, the queue is destroyed.

       To use this function, link in the realtime library by specifying on the compiler or linker command line.

RETURN VALUE

       returns the following values:

	      Successful completion.

	      Failure.
		   is set to indicate the error.

ERRORS

       If fails, is set to one of the following values:

	      mqdes	     is not a valid message queue descriptor.

	      is not supported by the implementation.

SEE ALSO

       mq_open(2), mq_unlink(2), mq_notify(2).

STANDARDS CONFORMANCE

																       mq_close(2)