Interrupt handlers in recent kernel

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Hi,
   I read that, in recent kernels since 2.1 there is no differentiation
between fast and slow handlers, both are treated alike.

How do Interrupts handlers in recent kernels behave like ? like
fast(interrupts disabled) or like slow handlers(interrupts enabled) of
earlier kernels?.

Please clarify.

Thanks in advance,
Nirranjan.K


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