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.TH "BLK_QUEUE_PREP_RQ" "" "06 October 2005" "" ""

.SH NAME
blk_queue_prep_rq \- set a prepare_request function for queue
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
void blk_queue_prep_rq  (request_queue_t * \fIq\fB, prep_rq_fn * \fIpfn\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIq\fB\fR
queue
.TP
\fB\fIpfn\fB\fR
prepare_request function
.SH "DESCRIPTION"
.PP
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.