diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index 43ad4e5..406ca97 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -142,6 +142,9 @@
 	: "cc");
 }
 
+/* write_can_lock - would write_trylock() succeed? */
+#define __raw_write_can_lock(x)		((x)->lock == 0x80000000)
+
 /*
  * Read locks are a bit more hairy:
  *  - Exclusively load the lock value.
@@ -198,4 +201,7 @@
 
 #define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
 
+/* read_can_lock - would read_trylock() succeed? */
+#define __raw_read_can_lock(x)		((x)->lock < 0x80000000)
+
 #endif /* __ASM_SPINLOCK_H */