Re: 2.6.7-rc2 mismatched preempt count in arch/i386/kernel/irq.c

[Nick Piggin]

Keith Owens wrote:
> 2.6.7-rc2 (and earlier) arch/i386/kernel/irq.c::do_IRQ() calls
> irq_exit() which expands into preempt_enable_no_resched(), amongst
> others.  With CONFIG_PREEMPT=y, preempt_enable_no_resched() does
> dec_preempt_count().  Where is the corresponding inc_preempt_count?
> AFAICT the use of preempt_enable_no_resched() is unbalanced.

If preempt is enabled, IRQ_EXIT_OFFSET is HARDIRQ_OFFSET-1.

I believe that is where the preempt_enable_no_resched is balanced.
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