LOCK_PTR_REG      316 include/asm-x86/spinlock.h 		     ::LOCK_PTR_REG (rw) : "memory");
LOCK_PTR_REG      325 include/asm-x86/spinlock.h 		     ::LOCK_PTR_REG (rw), "i" (RW_LOCK_BIAS) : "memory");