Fwd: where is the request_irq in 2.6.30?

[loody <miloody@xxxxxxxxx>]

Dear all:
Where tracing the kernel, 2.6.30, I cannot find "request_irq", which
is previous devined in kernel/irq/manage.c.
I see there is a new function request_threaded_irq seems to replace
request_irq if I config CONFIG_GENERIC_HARDIRQS.
But I see other device driver still use request_irq to register their interrupt.
Would anyone tell me where the function lacated and what is the
difference and why between request_irq and request_threaded_irq?
Thanks in advance,
miloody

#ifdef CONFIG_GENERIC_HARDIRQS
extern int __must_check
request_threaded_irq(unsigned int irq, irq_handler_t handler,
                    irq_handler_t thread_fn,
                    unsigned long flags, const char *name, void *dev);

static inline int __must_check
request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
           const char *name, void *dev)
{
       return request_threaded_irq(irq, handler, NULL, flags, name, dev);
}

extern void exit_irq_thread(void);
#else


extern int __must_check
request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
           const char *name, void *dev);

/*
 * Special function to avoid ifdeffery in kernel/irq/devres.c which
 * gets magically built by GENERIC_HARDIRQS=n architectures (sparc,
 * m68k). I really love these $@%#!* obvious Makefile references:
 * ../../../kernel/irq/devres.o
 */
static inline int __must_check
request_threaded_irq(unsigned int irq, irq_handler_t handler,
                    irq_handler_t thread_fn,
                    unsigned long flags, const char *name, void *dev)
{
       return request_irq(irq, handler, flags, name, dev);
}

static inline void exit_irq_thread(void) { }
#endif

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