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caddr_t -> void *
PR/4269: Chris Demetriou: Add MS_* to msync()

.\"	$NetBSD: mprotect.2,v 1.7 1997/10/16 23:21:56 christos Exp $
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.\"	@(#)mprotect.2	8.1 (Berkeley) 6/9/93
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.Dd June 9, 1993
.Dt MPROTECT 2
.Os
.Sh NAME
.Nm mprotect
.Nd control the protection of pages
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <sys/mman.h>
.Ft int
.Fn mprotect "void *addr" "size_t len" "int prot"
.Sh DESCRIPTION
The
.Fn mprotect
system call
changes the specified pages to have protection
.Fa prot .
Not all implementations will guarantee protection on a page basis;
the granularity of protection changes may be as large as an entire region.
.Sh SEE ALSO
.Xr madvise 2 , 
.Xr mincore 2 , 
.Xr msync 2 ,
.Xr munmap 2
.Sh HISTORY
The
.Fn mprotect
function first appeared in 4.4BSD.