diff --git a/include/linux/string.h b/include/linux/string.h
new file mode 100644
index 0000000..861e672
--- /dev/null
+++ b/include/linux/string.h
@@ -0,0 +1,139 @@
+#ifndef _LINUX_STRING_H_
+#define _LINUX_STRING_H_
+
+
+#ifndef __KERNEL__
+#include <string.h>
+#else
+
+#include <linux/compiler.h>	
+#include <linux/types.h>	
+#include <linux/stddef.h>	
+#include <stdarg.h>
+
+extern char *strndup_user(const char __user *, long);
+extern void *memdup_user(const void __user *, size_t);
+
+#include <asm/string.h>
+
+#ifndef __HAVE_ARCH_STRCPY
+extern char * strcpy(char *,const char *);
+#endif
+#ifndef __HAVE_ARCH_STRNCPY
+extern char * strncpy(char *,const char *, __kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRLCPY
+size_t strlcpy(char *, const char *, size_t);
+#endif
+#ifndef __HAVE_ARCH_STRCAT
+extern char * strcat(char *, const char *);
+#endif
+#ifndef __HAVE_ARCH_STRNCAT
+extern char * strncat(char *, const char *, __kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRLCAT
+extern size_t strlcat(char *, const char *, __kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRCMP
+extern int strcmp(const char *,const char *);
+#endif
+#ifndef __HAVE_ARCH_STRNCMP
+extern int strncmp(const char *,const char *,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRNICMP
+extern int strnicmp(const char *, const char *, __kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRCASECMP
+extern int strcasecmp(const char *s1, const char *s2);
+#endif
+#ifndef __HAVE_ARCH_STRNCASECMP
+extern int strncasecmp(const char *s1, const char *s2, size_t n);
+#endif
+#ifndef __HAVE_ARCH_STRCHR
+extern char * strchr(const char *,int);
+#endif
+#ifndef __HAVE_ARCH_STRNCHR
+extern char * strnchr(const char *, size_t, int);
+#endif
+#ifndef __HAVE_ARCH_STRRCHR
+extern char * strrchr(const char *,int);
+#endif
+extern char * __must_check skip_spaces(const char *);
+
+extern char *strim(char *);
+
+static inline __must_check char *strstrip(char *str)
+{
+	return strim(str);
+}
+
+#ifndef __HAVE_ARCH_STRSTR
+extern char * strstr(const char *, const char *);
+#endif
+#ifndef __HAVE_ARCH_STRNSTR
+extern char * strnstr(const char *, const char *, size_t);
+#endif
+#ifndef __HAVE_ARCH_STRLEN
+extern __kernel_size_t strlen(const char *);
+#endif
+#ifndef __HAVE_ARCH_STRNLEN
+extern __kernel_size_t strnlen(const char *,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_STRPBRK
+extern char * strpbrk(const char *,const char *);
+#endif
+#ifndef __HAVE_ARCH_STRSEP
+extern char * strsep(char **,const char *);
+#endif
+#ifndef __HAVE_ARCH_STRSPN
+extern __kernel_size_t strspn(const char *,const char *);
+#endif
+#ifndef __HAVE_ARCH_STRCSPN
+extern __kernel_size_t strcspn(const char *,const char *);
+#endif
+
+#ifndef __HAVE_ARCH_MEMSET
+extern void * memset(void *,int,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_MEMCPY
+extern void * memcpy(void *,const void *,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_MEMMOVE
+extern void * memmove(void *,const void *,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_MEMSCAN
+extern void * memscan(void *,int,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_MEMCMP
+extern int memcmp(const void *,const void *,__kernel_size_t);
+#endif
+#ifndef __HAVE_ARCH_MEMCHR
+extern void * memchr(const void *,int,__kernel_size_t);
+#endif
+void *memchr_inv(const void *s, int c, size_t n);
+
+extern char *kstrdup(const char *s, gfp_t gfp);
+extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
+extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
+
+extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
+extern void argv_free(char **argv);
+
+extern bool sysfs_streq(const char *s1, const char *s2);
+extern int strtobool(const char *s, bool *res);
+
+#ifdef CONFIG_BINARY_PRINTF
+int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
+int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
+int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
+#endif
+
+extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
+			const void *from, size_t available);
+
+static inline bool strstarts(const char *str, const char *prefix)
+{
+	return strncmp(str, prefix, strlen(prefix)) == 0;
+}
+#endif
+#endif