--- zzzz-none-000/linux-2.6.32.61/include/linux/compiler.h	2013-06-10 09:43:48.000000000 +0000
+++ ar10-7272-687/linux-2.6.32.61/include/linux/compiler.h	2014-08-12 13:03:17.000000000 +0000
@@ -15,6 +15,12 @@
 # define __acquire(x)	__context__(x,1)
 # define __release(x)	__context__(x,-1)
 # define __cond_lock(x,c)	((c) ? ({ __acquire(x); 1; }) : 0)
+# define __percpu   __attribute__((noderef, address_space(3)))
+#ifdef CONFIG_SPARSE_RCU_POINTER
+# define __rcu      __attribute__((noderef, address_space(4)))
+#else
+# define __rcu
+#endif
 extern void __chk_user_ptr(const volatile void __user *);
 extern void __chk_io_ptr(const volatile void __iomem *);
 #else
@@ -32,6 +38,8 @@
 # define __acquire(x) (void)0
 # define __release(x) (void)0
 # define __cond_lock(x,c) (c)
+# define __percpu
+# define __rcu
 #endif
 
 #ifdef __KERNEL__
@@ -141,7 +149,11 @@
 
 /* Optimization barrier */
 #ifndef barrier
+# ifdef CONFIG_MIPS
+# define barrier()   __sync_synchronize()
+# else
 # define barrier() __memory_barrier()
+# endif
 #endif
 
 #ifndef RELOC_HIDE