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VM_PAGE_PROTECT (9) | Kernel routines | Unix Manual Pages | :man

NAME

vm_page_protect - "lower a page’s protection"

CONTENTS

Synopsis
Description
Authors

SYNOPSIS


.In sys/param.h
.In vm/vm.h
.In 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:

mem The page whose protection is lowered.
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 .

July 14, 2001 VM_PAGE_PROTECT (9)
shtml">manServer 1.07 from vm_page_protect.9 using doc macros.


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