1 files changed, 26 insertions, 0 deletions

diff --git a/include/asm-generic/uaccess-unaligned.h b/include/asm-generic/uaccess-unaligned.h
new file mode 100644
index 000000000000..67deb898f0c5
--- /dev/null
+++ b/include/asm-generic/uaccess-unaligned.h
@@ -0,0 +1,26 @@
+#ifndef __ASM_GENERIC_UACCESS_UNALIGNED_H
+#define __ASM_GENERIC_UACCESS_UNALIGNED_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_UNALIGNED_H */