46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
.if n .pH ddi.rm/d3/gen/bp_mapout @(#)bp_mapout 43.11 of 3/25/93
|
|
.\" Copyright 1992, 1991 UNIX System Laboratories, Inc.
|
|
.TH bp_mapout D3
|
|
.IX "\f4bp_mapout\fP(D3)"
|
|
.SH NAME
|
|
\f4bp_mapout\f1 \- deallocate virtual address space for buffer page list
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.na
|
|
.ft 4
|
|
#include <sys/types.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/ddi.h>
|
|
.sp 0.4
|
|
void bp_mapout(struct buf_t *\f2bp\fP);
|
|
.ft 1
|
|
.ad
|
|
.fi
|
|
.SS Arguments
|
|
.RS 0
|
|
.IP "\f2bp\fP" 10n
|
|
Pointer to the buffer header structure.
|
|
.RE
|
|
.SH DESCRIPTION
|
|
The \f4bp_mapout\fP function deallocates the system virtual address space
|
|
associated with a buffer header page list.
|
|
.SS "Return Values"
|
|
None
|
|
.SH USAGE
|
|
The virtual address space must have been allocated by
|
|
a previous call to \f4bp_mapin\fP(D3).
|
|
Drivers should not reference any virtual addresses in the mapped range
|
|
after \f4bp_mapout\fP has been called.
|
|
.SS Level
|
|
Base or Interrupt.
|
|
.SS "Synchronization Constraints"
|
|
Does not sleep.
|
|
.P
|
|
Driver-defined basic locks, read/write locks, and sleep locks
|
|
may be held across calls to this function.
|
|
.SH REFERENCES
|
|
.na
|
|
\f4bp_mapin\fP(D3),
|
|
\f4buf\fP(D4)
|
|
.ad
|