Provided by: freebsd-manpages_7.0-2_all
vm_page_protect - lower a page’s protection
vm_page_protect(vm_page_t mem, int prot);
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.
This manual page was written by Chad David 〈email@example.com〉.