char oldval; 
int oldval; 
static inline int __raw_spin_trylock(raw_spinlock_t *lock){	char oldval;	__asm__ __volatile__(		"xchgb %b0,%1"		:"=q" (oldval), "=m" (lock->slock)		:"0" (0) : "memory");	return oldval > 0;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/485832a5d928facd82f1525270d9f048da2063a1/spinlock.h/clean/include/asm-x86_64/spinlock.h