[PATCH] Fix typo in x86_64 __build_write_lock_const assembly

Based on __build_read_lock_const, this looked like a bug.

[ Indeed. Maybe nobody uses this version? Worth fixing up anyway ]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

include/asm-x86_64/rwlock.h

@@ -64,7 +64,7 @@
 		     ::"a" (rw) : "memory")
 
 #define __build_write_lock_const(rw, helper) \
-	asm volatile(LOCK "subl $" RW_LOCK_BIAS_STR ",(%0)\n\t" \
+	asm volatile(LOCK "subl $" RW_LOCK_BIAS_STR ",%0\n\t" \
 		     "jnz 2f\n" \
 		     "1:\n" \
 		    LOCK_SECTION_START("") \