From 5088c53a88cc4853d822e710dee8fad2b6fd29af Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@mev.co.uk>
Date: Mon, 11 May 2009 10:15:12 +0000
Subject: [PATCH] Add strict_strtoX() compatibilty functions for kernel <
 2.6.25. Reported by labrat <tvrkng -at- gmail -dot- com>.

---
 include/linux/kernel.h | 97 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 46f78af1..693a71c1 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -31,4 +31,101 @@
 
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+/* Add missing strict_strtox functions. */
+#include <linux/string.h>
+#include <linux/errno.h>
+
+static inline int comedi_strict_strtoul(const char *cp, unsigned int base,
+	unsigned long *res)
+{
+	char *tail;
+	unsigned long val;
+	size_t len;
+
+	*res = 0;
+	len = strlen(cp);
+	if (len == 0)
+		return -EINVAL;
+
+	val = simple_strtoul(cp, &tail, base);
+	if (tail == cp)
+		return -EINVAL;
+	if ((*tail == '\0') ||
+		((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+		*res = val;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+#undef strict_strtoul
+#define strict_strtoul(cp, base, res) comedi_strict_strtoul(cp, base, res)
+
+static inline int comedi_strict_strtol(const char *cp, unsigned int base,
+	long *res)
+{
+	int ret;
+	if (*cp == '-') {
+		ret = comedi_strict_strtoul(cp + 1, base, (unsigned long *)res);
+		if (!ret)
+			*res = -(*res);
+	} else {
+		ret = comedi_strict_strtoul(cp, base, (unsigned long *)res);
+	}
+
+	return ret;
+}
+
+#undef strict_strtol
+#define strict_strtol(cp, base, res) comedi_strict_strtoul(cp, base, res)
+
+static inline int comedi_strict_strtoull(const char *cp, unsigned int base,
+	unsigned long long *res)
+{
+	char *tail;
+	unsigned long long val;
+	size_t len;
+
+	*res = 0;
+	len = strlen(cp);
+	if (len == 0)
+		return -EINVAL;
+
+	val = simple_strtoull(cp, &tail, base);
+	if (tail == cp)
+		return -EINVAL;
+	if ((*tail == '\0') ||
+		((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+		*res = val;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+#undef strict_strtoull
+#define strict_strtoull(cp, base, res) comedi_strict_strtoul(cp, base, res)
+
+static inline int comedi_strict_strtoll(const char *cp, unsigned int base,
+	long long *res)
+{
+	int ret;
+	if (*cp == '-') {
+		ret = comedi_strict_strtoull(cp + 1, base, (unsigned long long *)res);
+		if (!ret)
+			*res = -(*res);
+	} else {
+		ret = comedi_strict_strtoull(cp, base, (unsigned long long *)res);
+	}
+
+	return ret;
+}
+
+#undef strict_strtoll
+#define strict_strtoll(cp, base, res) comedi_strict_strtoul(cp, base, res)
+
+#endif
+
 #endif // _KERNEL_COMPAT_H
-- 
2.26.2