_raw_read_lock_irqsave
#define _raw_read_lock_irqsave(lock) __raw_read_lock_irqsave(lock)
#define _raw_read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags, shared)
noinline unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)