Thanks! This is good to know. This means if I use it inside of
spinlock_irqsave() outside an interrupt, it will tell me not to context
switch .... Need to look at this.
Jeff
Tigran Aivazian wrote:
>
> 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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