Index: lib/libc/sys/mprotect.2
===================================================================
--- lib/libc/sys/mprotect.2
+++ lib/libc/sys/mprotect.2
@@ -28,7 +28,7 @@
 .\"	@(#)mprotect.2	8.1 (Berkeley) 6/9/93
 .\" $FreeBSD$
 .\"
-.Dd February 26, 2020
+.Dd June 11, 2021
 .Dt MPROTECT 2
 .Os
 .Sh NAME
@@ -46,14 +46,19 @@
 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.
-A region is the virtual address space defined by the start
-and end addresses of a
-.Vt "struct vm_map_entry" .
 .Pp
-Currently these protection bits are known,
-which can be combined, OR'd together:
+Some architectures support more than one page size.
+For mapping with page sizes larger than the default
+.Dv PAGE_SIZE ,
+the
+.Fa addr
+and
+.Fa len
+arguments must cover then entire page.
+.Pp
+The
+.Fa prot
+argument shall be the bitwise OR of one or more of the following values:
 .Pp
 .Bl -tag -width ".Dv PROT_WRITE" -compact
 .It Dv PROT_NONE
@@ -66,8 +71,11 @@
 The pages can be executed.
 .El
 .Pp
-In addition to these protection flags,
+In addition to these standard protection flags,
+the
 .Fx
+implementation of
+.Fn mprotect
 provides the ability to set the maximum protection of a region
 (which prevents
 .Nm