wait_on_irq race condition? (and solution??)

I've run into problems with 'wait_on_irq' where global_irq_count was 1,
but neither had anything in local_irq_count.

I think the race condition that Linus found that we ignore might actually
matter..

Anway, I made our irq.c look more like x86's, and it seems to have solved
the problem on my MTX so far.

Should I commit this to 2_4_devel?

--
Troy Benjegerdes | master of mispeeling | 'da hozer' |  hozer@drgw.net
-----"If this message isn't misspelled, I didn't write it" -- Me -----
"Why do musicians compose symphonies and poets write poems? They do it
because life wouldn't have any meaning for them if they didn't. That's
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