diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -44,6 +44,7 @@
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
 #include <linux/container_of.h>
+#include <linux/kstrtox.h>
 #include <linux/limits.h>
 #include <linux/math.h>
 #include <linux/minmax.h>
@@ -269,253 +270,6 @@
 
 #define _RET_IP_		__builtin_return_address(0)
 
-static inline unsigned long long
-simple_strtoull(const char *cp, char **endp, unsigned int base)
-{
-	return (strtouq(cp, endp, base));
-}
-
-static inline long long
-simple_strtoll(const char *cp, char **endp, unsigned int base)
-{
-	return (strtoq(cp, endp, base));
-}
-
-static inline unsigned long
-simple_strtoul(const char *cp, char **endp, unsigned int base)
-{
-	return (strtoul(cp, endp, base));
-}
-
-static inline long
-simple_strtol(const char *cp, char **endp, unsigned int base)
-{
-	return (strtol(cp, endp, base));
-}
-
-static inline int
-kstrtoul(const char *cp, unsigned int base, unsigned long *res)
-{
-	char *end;
-
-	*res = strtoul(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	return (0);
-}
-
-static inline int
-kstrtol(const char *cp, unsigned int base, long *res)
-{
-	char *end;
-
-	*res = strtol(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	return (0);
-}
-
-static inline int
-kstrtoint(const char *cp, unsigned int base, int *res)
-{
-	char *end;
-	long temp;
-
-	*res = temp = strtol(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	if (temp != (int)temp)
-		return (-ERANGE);
-	return (0);
-}
-
-static inline int
-kstrtouint(const char *cp, unsigned int base, unsigned int *res)
-{
-	char *end;
-	unsigned long temp;
-
-	*res = temp = strtoul(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	if (temp != (unsigned int)temp)
-		return (-ERANGE);
-	return (0);
-}
-
-static inline int
-kstrtou8(const char *cp, unsigned int base, u8 *res)
-{
-	char *end;
-	unsigned long temp;
-
-	*res = temp = strtoul(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	if (temp != (u8)temp)
-		return (-ERANGE);
-	return (0);
-}
-
-static inline int
-kstrtou16(const char *cp, unsigned int base, u16 *res)
-{
-	char *end;
-	unsigned long temp;
-
-	*res = temp = strtoul(cp, &end, base);
-
-	/* skip newline character, if any */
-	if (*end == '\n')
-		end++;
-	if (*cp == 0 || *end != 0)
-		return (-EINVAL);
-	if (temp != (u16)temp)
-		return (-ERANGE);
-	return (0);
-}
-
-static inline int
-kstrtou32(const char *cp, unsigned int base, u32 *res)
-{
-
-	return (kstrtouint(cp, base, res));
-}
-
-static inline int
-kstrtou64(const char *cp, unsigned int base, u64 *res)
-{
-       char *end;
-
-       *res = strtouq(cp, &end, base);
-
-       /* skip newline character, if any */
-       if (*end == '\n')
-               end++;
-       if (*cp == 0 || *end != 0)
-               return (-EINVAL);
-       return (0);
-}
-
-static inline int
-kstrtoull(const char *cp, unsigned int base, unsigned long long *res)
-{
-	return (kstrtou64(cp, base, (u64 *)res));
-}
-
-static inline int
-kstrtobool(const char *s, bool *res)
-{
-	int len;
-
-	if (s == NULL || (len = strlen(s)) == 0 || res == NULL)
-		return (-EINVAL);
-
-	/* skip newline character, if any */
-	if (s[len - 1] == '\n')
-		len--;
-
-	if (len == 1 && strchr("yY1", s[0]) != NULL)
-		*res = true;
-	else if (len == 1 && strchr("nN0", s[0]) != NULL)
-		*res = false;
-	else if (strncasecmp("on", s, len) == 0)
-		*res = true;
-	else if (strncasecmp("off", s, len) == 0)
-		*res = false;
-	else
-		return (-EINVAL);
-
-	return (0);
-}
-
-static inline int
-kstrtobool_from_user(const char __user *s, size_t count, bool *res)
-{
-	char buf[8] = {};
-
-	if (count > (sizeof(buf) - 1))
-		count = (sizeof(buf) - 1);
-
-	if (copy_from_user(buf, s, count))
-		return (-EFAULT);
-
-	return (kstrtobool(buf, res));
-}
-
-static inline int
-kstrtoint_from_user(const char __user *s, size_t count, unsigned int base,
-    int *p)
-{
-	char buf[36] = {};
-
-	if (count > (sizeof(buf) - 1))
-		count = (sizeof(buf) - 1);
-
-	if (copy_from_user(buf, s, count))
-		return (-EFAULT);
-
-	return (kstrtoint(buf, base, p));
-}
-
-static inline int
-kstrtouint_from_user(const char __user *s, size_t count, unsigned int base,
-    unsigned int *p)
-{
-	char buf[36] = {};
-
-	if (count > (sizeof(buf) - 1))
-		count = (sizeof(buf) - 1);
-
-	if (copy_from_user(buf, s, count))
-		return (-EFAULT);
-
-	return (kstrtouint(buf, base, p));
-}
-
-static inline int
-kstrtou32_from_user(const char __user *s, size_t count, unsigned int base,
-    unsigned int *p)
-{
-
-	return (kstrtouint_from_user(s, count, base, p));
-}
-
-static inline int
-kstrtou8_from_user(const char __user *s, size_t count, unsigned int base,
-    u8 *p)
-{
-	char buf[8] = {};
-
-	if (count > (sizeof(buf) - 1))
-		count = (sizeof(buf) - 1);
-
-	if (copy_from_user(buf, s, count))
-		return (-EFAULT);
-
-	return (kstrtou8(buf, base, p));
-}
-
 #define offsetofend(t, m)	\
         (offsetof(t, m) + sizeof((((t *)0)->m)))
 
diff --git a/sys/compat/linuxkpi/common/include/linux/kstrtox.h b/sys/compat/linuxkpi/common/include/linux/kstrtox.h
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/kstrtox.h
@@ -0,0 +1,310 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2017-2018 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ * Copyright (c) 2018 Johannes Lundberg <johalun0@gmail.com>
+ * Copyright (c) 2020-2022 The FreeBSD Foundation
+ * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
+ *
+ * Portions of this software were developed by Bjoern A. Zeeb and
+ * Emmanuel Vadot under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 unmodified, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifndef	_LINUXKPI_LINUX_KSTRTOX_H_
+#define	_LINUXKPI_LINUX_KSTRTOX_H_
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/libkern.h>
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+#include <asm/uaccess.h>
+
+static inline unsigned long long
+simple_strtoull(const char *cp, char **endp, unsigned int base)
+{
+	return (strtouq(cp, endp, base));
+}
+
+static inline long long
+simple_strtoll(const char *cp, char **endp, unsigned int base)
+{
+	return (strtoq(cp, endp, base));
+}
+
+static inline unsigned long
+simple_strtoul(const char *cp, char **endp, unsigned int base)
+{
+	return (strtoul(cp, endp, base));
+}
+
+static inline long
+simple_strtol(const char *cp, char **endp, unsigned int base)
+{
+	return (strtol(cp, endp, base));
+}
+
+static inline int
+kstrtoul(const char *cp, unsigned int base, unsigned long *res)
+{
+	char *end;
+
+	*res = strtoul(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	return (0);
+}
+
+static inline int
+kstrtol(const char *cp, unsigned int base, long *res)
+{
+	char *end;
+
+	*res = strtol(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	return (0);
+}
+
+static inline int
+kstrtoint(const char *cp, unsigned int base, int *res)
+{
+	char *end;
+	long temp;
+
+	*res = temp = strtol(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	if (temp != (int)temp)
+		return (-ERANGE);
+	return (0);
+}
+
+static inline int
+kstrtouint(const char *cp, unsigned int base, unsigned int *res)
+{
+	char *end;
+	unsigned long temp;
+
+	*res = temp = strtoul(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	if (temp != (unsigned int)temp)
+		return (-ERANGE);
+	return (0);
+}
+
+static inline int
+kstrtou8(const char *cp, unsigned int base, u8 *res)
+{
+	char *end;
+	unsigned long temp;
+
+	*res = temp = strtoul(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	if (temp != (u8)temp)
+		return (-ERANGE);
+	return (0);
+}
+
+static inline int
+kstrtou16(const char *cp, unsigned int base, u16 *res)
+{
+	char *end;
+	unsigned long temp;
+
+	*res = temp = strtoul(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	if (temp != (u16)temp)
+		return (-ERANGE);
+	return (0);
+}
+
+static inline int
+kstrtou32(const char *cp, unsigned int base, u32 *res)
+{
+
+	return (kstrtouint(cp, base, res));
+}
+
+static inline int
+kstrtos64(const char *cp, unsigned int base, s64 *res)
+{
+	char *end;
+
+	*res = strtoq(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	return (0);
+}
+
+static inline int
+kstrtou64(const char *cp, unsigned int base, u64 *res)
+{
+	char *end;
+
+	*res = strtouq(cp, &end, base);
+
+	/* skip newline character, if any */
+	if (*end == '\n')
+		end++;
+	if (*cp == 0 || *end != 0)
+		return (-EINVAL);
+	return (0);
+}
+
+static inline int
+kstrtoull(const char *cp, unsigned int base, unsigned long long *res)
+{
+	return (kstrtou64(cp, base, (u64 *)res));
+}
+
+static inline int
+kstrtobool(const char *s, bool *res)
+{
+	int len;
+
+	if (s == NULL || (len = strlen(s)) == 0 || res == NULL)
+		return (-EINVAL);
+
+	/* skip newline character, if any */
+	if (s[len - 1] == '\n')
+		len--;
+
+	if (len == 1 && strchr("yY1", s[0]) != NULL)
+		*res = true;
+	else if (len == 1 && strchr("nN0", s[0]) != NULL)
+		*res = false;
+	else if (strncasecmp("on", s, len) == 0)
+		*res = true;
+	else if (strncasecmp("off", s, len) == 0)
+		*res = false;
+	else
+		return (-EINVAL);
+
+	return (0);
+}
+
+static inline int
+kstrtobool_from_user(const char __user *s, size_t count, bool *res)
+{
+	char buf[8] = {};
+
+	if (count > (sizeof(buf) - 1))
+		count = (sizeof(buf) - 1);
+
+	if (copy_from_user(buf, s, count))
+		return (-EFAULT);
+
+	return (kstrtobool(buf, res));
+}
+
+static inline int
+kstrtoint_from_user(const char __user *s, size_t count, unsigned int base,
+    int *p)
+{
+	char buf[36] = {};
+
+	if (count > (sizeof(buf) - 1))
+		count = (sizeof(buf) - 1);
+
+	if (copy_from_user(buf, s, count))
+		return (-EFAULT);
+
+	return (kstrtoint(buf, base, p));
+}
+
+static inline int
+kstrtouint_from_user(const char __user *s, size_t count, unsigned int base,
+    unsigned int *p)
+{
+	char buf[36] = {};
+
+	if (count > (sizeof(buf) - 1))
+		count = (sizeof(buf) - 1);
+
+	if (copy_from_user(buf, s, count))
+		return (-EFAULT);
+
+	return (kstrtouint(buf, base, p));
+}
+
+static inline int
+kstrtou32_from_user(const char __user *s, size_t count, unsigned int base,
+    unsigned int *p)
+{
+
+	return (kstrtouint_from_user(s, count, base, p));
+}
+
+static inline int
+kstrtou8_from_user(const char __user *s, size_t count, unsigned int base,
+    u8 *p)
+{
+	char buf[8] = {};
+
+	if (count > (sizeof(buf) - 1))
+		count = (sizeof(buf) - 1);
+
+	if (copy_from_user(buf, s, count))
+		return (-EFAULT);
+
+	return (kstrtou8(buf, base, p));
+}
+
+#endif	/* _LINUXKPI_LINUX_KSTRTOX_H_ */