diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index cc228f4..ca59e4f 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -762,5 +762,30 @@
 #undef __copy_from_user_overflow
 #undef __copy_to_user_overflow
 
+/*
+ * The "unsafe" user accesses aren't really "unsafe", but the naming
+ * is a big fat warning: you have to not only do the access_ok()
+ * checking before using them, but you have to surround them with the
+ * user_access_begin/end() pair.
+ */
+#define user_access_begin()	__uaccess_begin()
+#define user_access_end()	__uaccess_end()
+
+#define unsafe_put_user(x, ptr)						\
+({										\
+	int __pu_err;								\
+	__put_user_size((x), (ptr), sizeof(*(ptr)), __pu_err, -EFAULT);		\
+	__builtin_expect(__pu_err, 0);						\
+})
+
+#define unsafe_get_user(x, ptr)						\
+({										\
+	int __gu_err;								\
+	unsigned long __gu_val;							\
+	__get_user_size(__gu_val, (ptr), sizeof(*(ptr)), __gu_err, -EFAULT);	\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;				\
+	__builtin_expect(__gu_err, 0);						\
+})
+
 #endif /* _ASM_X86_UACCESS_H */
 
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 558129a..3495578 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -111,4 +111,11 @@
 #define probe_kernel_address(addr, retval)		\
 	probe_kernel_read(&retval, addr, sizeof(retval))
 
+#ifndef user_access_begin
+#define user_access_begin() do { } while (0)
+#define user_access_end() do { } while (0)
+#define unsafe_get_user(x, ptr) __get_user(x, ptr)
+#define unsafe_put_user(x, ptr) __put_user(x, ptr)
+#endif
+
 #endif		/* __LINUX_UACCESS_H__ */