[patch] softirq-2.4.6-C3

[Ingo Molnar]

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a number of softirq.c updates (the patch is still relative to -B4 and
includes all -C2 changes as well):

- do_softirq() does not have to keep irqs disabled when returning.

- in do_softirq(), disable_local_bh() can be done after checking for
  pending softirqs.

- the goto retry thing has no effect on gcc's code, so it's an unnecessery
  complication of the code.

- ditto the in_interrupt() check, no point in doing a goto, gcc optimizes
  this already.

do_softirq() is now a very compact and straightforward function.

	Ingo

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