Jeff Garzik <[EMAIL PROTECTED]> writes: > commit 008b5fcf3c1d8456005de26ddd4256b1369225e8 > Author: Jeff Garzik <[EMAIL PROTECTED]> > Date: Fri Oct 19 00:45:51 2007 -0400 > > [IRQ ARG REMOVAL] core interrupt delivery infrastructure updates > > include/asm-generic/irq_regs.h | 25 +++++++++++++++++++++++++ > include/linux/interrupt.h | 4 ++-- > kernel/irq/handle.c | 5 +++-- > kernel/irq/manage.c | 4 ++-- > kernel/irq/spurious.c | 3 ++- > lib/irq_regs.c | 5 +++++ > 6 files changed, 39 insertions(+), 7 deletions(-) > > 008b5fcf3c1d8456005de26ddd4256b1369225e8 > diff --git a/include/asm-generic/irq_regs.h b/include/asm-generic/irq_regs.h > index 5ae1d07..1d99ef4 100644 > --- a/include/asm-generic/irq_regs.h > +++ b/include/asm-generic/irq_regs.h > @@ -34,4 +34,29 @@ static inline struct pt_regs *set_irq_regs(struct pt_regs > *new_regs) > return old_regs; > } > > +DECLARE_PER_CPU(unsigned int, __irqfunc_irqs); > + > +static inline unsigned int get_irqfunc_irq(void) > +{ > + return __get_cpu_var(__irqfunc_irqs); > +} > + > +#if 0 > +static inline unsigned int set_irqfunc_irq(unsigned int new_irq) > +{ > + unsigned int old_irq, *pirq = &__get_cpu_var(__irqfunc_irqs); > + > + old_irq = *pirq; > + *pirq = new_irq; > + return old_irq; > +} > +#else > +static inline void set_irqfunc_irq(unsigned int new_irq) > +{ > + int *pirq = &__get_cpu_var(__irqfunc_irqs); > + > + *pirq = new_irq; > +} > +#endif
Please look at handle_IRQ_event. Local irqs are enabled so irq recursion can happen. So not handling old_irq is a big nasty bug. Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/