Small markup fixes.

lib/libc/sys/mmap.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mmap.2,v 1.52 2018/05/02 16:00:20 christos Exp $
+.\"	$NetBSD: mmap.2,v 1.53 2019/06/19 20:20:52 uwe Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -68,7 +68,7 @@ If
 is zero, an address will be selected by the system.
 The actual starting address of the region is returned.
 A successful
-.Fa mmap
+.Nm
 deletes any previous mapping in the allocated address range.
 .Pp
 The protections (region accessibility) are specified in the
@@ -184,7 +184,9 @@ specified.
 If the specified address cannot be used,
 .Nm mmap
 will fail.
-If MAP_FIXED is specified,
+If
+.Dv MAP_FIXED
+is specified,
 .Fa addr
 must be a multiple of the pagesize.
 Use of this option is discouraged.
@@ -225,7 +227,7 @@ had not been specified.
 If
 .Fa addr
 is
-.Fa NULL ,
+.Dv NULL ,
 this flag is ignored and the system will select a mapping address.
 .It Dv MAP_WIRED
 Lock the mapped region into memory as with
@@ -270,7 +272,7 @@ is set to indicate the error.
 The symbol
 .Dv MAP_FAILED
 is defined in the header
-.Ao Pa sys/mman.h Ac .
+.In sys/mman.h .
 No successful return from
 .Fn mmap
 will return the value
@@ -300,7 +302,7 @@ parameters and
 .Fa fd
 was not open for writing.
 .Pp
-PAX mprotect restrictions prohibit the requested protection.
+PaX mprotect restrictions prohibit the requested protection.
 .It Bq Er EBADF
 .Fa fd
 is not a valid open file descriptor.
@@ -318,7 +320,8 @@ was specified and the
 parameter was not page aligned or was outside of the
 valid address range for a process.
 .Pp
-.Dv MAP_ANON was specified and
+.Dv MAP_ANON
+was specified and
 .Fa fd
 was not \-1.
 .It Bq Er ENODEV

lib/libc/sys/mprotect.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mprotect.2,v 1.26 2017/05/14 12:30:37 wiz Exp $
+.\"	$NetBSD: mprotect.2,v 1.27 2019/06/19 20:28:36 uwe Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -43,7 +43,7 @@
 .Fn mprotect "void *addr" "size_t len" "int prot"
 .Sh DESCRIPTION
 The
-.Fn mprotect
+.Nm
 system call
 changes the specified pages to have protection
 .Fa prot .
@@ -56,7 +56,7 @@ argument by
 .Tn OR Ns 'ing
 the following values:
 .Pp
-.Bl -tag -width MAP_FIXEDX -offset indent
+.Bl -tag -width "Dv MAP_WRITE" -offset indent
 .It Dv PROT_EXEC
 Pages may be executed.
 .It Dv PROT_READ
@@ -87,7 +87,7 @@ The new protection is less restrictive than the protection originally
 set with
 .Xr mmap 2 .
 .Pp
-PAX mprotect restrictions prohibit the requested protection.
+PaX mprotect restrictions prohibit the requested protection.
 .It Bq Er EINVAL
 An invalid memory range, or invalid parameters were provided.
 .It Bq Er ENOMEM
@@ -101,6 +101,6 @@ A resource shortage occurred while internally calling
 .Xr munmap 2
 .Sh HISTORY
 The
-.Fn mprotect
+.Nm
 function first appeared in
 .Bx 4.4 .