help on lost interrupt

[Rajendra Prasad]

Hi,

I was looking the source code of linux for ppc. In the interrupt
handling
there is a concept of lost_interrupt and do_lost_interrupt. I could not
understand why this is required and how it is managed on linux.

Is it something like interrupt is recognized by isr but not serviced by
the 
drivers and interrupt is left as disabled?

regards
Rajendra Prasad
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