How can I decide whether my code is running in interrupt context or not?

[Yong Fan]

Thanks your warm reply.
I see.

Thanks
Yongfan

-----Original Message-----
From: John Baldwin [mailto:jhb at freebsd.org]
Sent: Monday, March 19, 2012 7:24 AM
To: freebsd-drivers at freebsd.org
Cc: Yong Fan; drivers at FreeBSD.org
Subject: Re: How can I decide whether my code is running in interrupt context or not?

On Thursday, March 15, 2012 10:06:13 pm Yong Fan wrote:
> Hi all,
>
> In Linux, I can use in_interrupt() function.
> FreeBSD has such a similar kernel function for drivers?

Hmm, we do not, though the only part of your driver that can run in primary
interrupt context is an interrupt filter.  If you mean interrupt-thread
context (i.e. when sleeping is not permitted), then that would apply to your
normal interrupt handler and any callout routines that you have.

--
John Baldwin

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