On Fri, 11 Aug 2000, Linus Torvalds wrote:
> On Fri, 11 Aug 2000, Jeff V. Merkey wrote:
> >
> > Is there a counter of some type in Linux I could check to detect this
> > easily?
>
> It's called
>
> in_interrupt()
>
> in Linux - it's not a single counter, as hard interrupts and soft
> interrupts are counted separately, but it gives you the information you
> want (whether you're in an interrupt or not).
with one documented "gotcha", though - it returns false positive if you
have interrupts disabled. According to Rusty Russel's Unreliable Guide to
Locking, page 7.
Regards,
Tigran
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