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-rw-r--r--include/asm-generic/uaccess.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
new file mode 100644
index 00000000000..549cb3a1640
--- /dev/null
+++ b/include/asm-generic/uaccess.h
@@ -0,0 +1,26 @@
+#ifndef _ASM_GENERIC_UACCESS_H_
+#define _ASM_GENERIC_UACCESS_H_
+
+/*
+ * This macro should be used instead of __get_user() when accessing
+ * values at locations that are not known to be aligned.
+ */
+#define __get_user_unaligned(x, ptr) \
+({ \
+ __typeof__ (*(ptr)) __x; \
+ __copy_from_user(&__x, (ptr), sizeof(*(ptr))) ? -EFAULT : 0; \
+ (x) = __x; \
+})
+
+
+/*
+ * This macro should be used instead of __put_user() when accessing
+ * values at locations that are not known to be aligned.
+ */
+#define __put_user_unaligned(x, ptr) \
+({ \
+ __typeof__ (*(ptr)) __x = (x); \
+ __copy_to_user((ptr), &__x, sizeof(*(ptr))) ? -EFAULT : 0; \
+})
+
+#endif /* _ASM_GENERIC_UACCESS_H */