#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_page.h> void
vm_page_protect (vm_page_t mem int prot);
DESCRIPTION
The
vm_page_protect ();
function lowers a page's protection.
The protection is never raised by this function; therefore, if the page is
already at
VM_PROT_NONE
the function does nothing.
Its arguments are:
Fa mem
The page whose protection is lowered.
Fa prot
The protection the page should be reduced to.
If
VM_PROT_NONE
is specified, then the
PG_WRITABLE
and
PG_MAPPED
flags are cleared and the pmap_page's protection is set to
VM_PROT_NONE
If
VM_PROT_READ
is specified, then the
PG_WRITABLE
flag is cleared and the pmap_page's protection is set to
VM_PROT_READ
Higher protection requests are ignored.
AUTHORS
This manual page was written by
An Chad David Aq davidc@acns.ab.ca .
