1 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
new file mode 100644
index 0000000000..94d59dcc44
--- /dev/null
+++ b/include/linux/uaccess.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_UACCESS_H__
+#define __LINUX_UACCESS_H__
+
+#include <asm-generic/uaccess.h>
+
+
+/*
+ * Check at compile time that something is of a particular type.
+ * Always evaluates to 1 so you may use it easily in comparisons.
+ */
+#define typecheck(type,x) \
+({	type __dummy; \
+	typeof(x) __dummy2; \
+	(void)(&__dummy == &__dummy2); \
+	1; \
+})
+
+#define u64_to_user_ptr(x) (		\
+{					\
+	typecheck(u64, (x));		\
+	(void __user *)(uintptr_t)(x);	\
+}					\
+)
+
+static __always_inline unsigned long __must_check
+copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	return raw_copy_from_user(to, from, n);
+}
+
+static __always_inline unsigned long __must_check
+copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	return raw_copy_to_user(to, from, n);
+}
+
+#endif		/* __LINUX_UACCESS_H__ */