backported from 3.6.20

http://bugs.gentoo.org/153494

--- include/reiserfs_fs.h
+++ include/reiserfs_fs.h
@@ -38,14 +38,22 @@
 # define extern_inline
 #endif
 
-#include <asm/unaligned.h>
-
 #ifndef get_unaligned
-#if defined(__ppc__) || defined(ppc) || defined(__ppc) || \
-    defined(__PPC) || defined(powerpc) || defined(__powerpc__)
-#	define get_unaligned(ptr)	(*(ptr))
-#	define put_unaligned(val,ptr)	((void)(*(ptr) = (val)))
+#define get_unaligned(ptr)                              \
+({                                                      \
+        __typeof__(*(ptr)) __tmp;                       \
+        memcpy(&__tmp, (ptr), sizeof(*(ptr)));      \
+        __tmp;                                          \
+})
 #endif
+
+#ifndef put_unaligned
+#define put_unaligned(val, ptr)                         \
+({                                                      \
+        __typeof__(*(ptr)) __tmp = (val);               \
+        memcpy((ptr), &__tmp, sizeof(*(ptr)));      \
+        (void)0;                                        \
+})
 #endif
 
 #define get_leXX(xx,p,field)	(le##xx##_to_cpu ((p)->field))