Index: head/sys/sys/ctype.h
===================================================================
--- head/sys/sys/ctype.h	(revision 345498)
+++ head/sys/sys/ctype.h	(revision 345499)
@@ -1,59 +1,105 @@
 /*-
  * SPDX-License-Identifier: BSD-3-Clause
  *
  * Copyright (c) 1982, 1988, 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  * (c) UNIX System Laboratories, Inc.
  * All or some portions of this file are derived from material licensed
  * to the University of California by American Telephone and Telegraph
  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  * the permission of UNIX System Laboratories, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  * $FreeBSD$
  */
 
 #ifndef _SYS_CTYPE_H_
 #define	_SYS_CTYPE_H_
 
 #ifdef _KERNEL
 
-#define isspace(c)	((c) == ' ' || ((c) >= '\t' && (c) <= '\r'))
-#define isascii(c)	(((c) & ~0x7f) == 0)
-#define isupper(c)	((c) >= 'A' && (c) <= 'Z')
-#define islower(c)	((c) >= 'a' && (c) <= 'z')
-#define isalpha(c)	(isupper(c) || islower(c))
-#define isdigit(c)	((c) >= '0' && (c) <= '9')
-#define isxdigit(c)	(isdigit(c) \
-			  || ((c) >= 'A' && (c) <= 'F') \
-			  || ((c) >= 'a' && (c) <= 'f'))
-#define isprint(c)	((c) >= ' ' && (c) <= '~')
+static __inline int
+isspace(int c)
+{
+	return (c == ' ' || (c >= '\t' && c <= '\r'));
+}
 
-#define toupper(c)	((c) - 0x20 * (((c) >= 'a') && ((c) <= 'z')))
-#define tolower(c)	((c) + 0x20 * (((c) >= 'A') && ((c) <= 'Z')))
+static __inline int
+isascii(int c)
+{
+	return ((c & ~0x7f) == 0);
+}
+
+static __inline int
+isupper(int c)
+{
+	return (c >= 'A' && c <= 'Z');
+}
+
+static __inline int
+islower(int c)
+{
+	return (c >= 'a' && c <= 'z');
+}
+
+static __inline int
+isalpha(int c)
+{
+	return (isupper(c) || islower(c));
+}
+
+static __inline int
+isdigit(int c)
+{
+	return (c >= '0' && c <= '9');
+}
+
+static __inline int
+isxdigit(int c)
+{
+	return (isdigit(c) || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'));
+}
+
+static __inline int
+isprint(int c)
+{
+	return (c >= ' ' && c <= '~');
+}
+
+static __inline int
+toupper(int c)
+{
+	return (c - 0x20 * ((c >= 'a') && (c <= 'z')));
+}
+
+static __inline int
+tolower(int c)
+{
+	return (c + 0x20 * ((c >= 'A') && (c <= 'Z')));
+}
 
 #endif
 #endif /* !_SYS_CTYPE_H_ */