linux-kernel - How to check whether executing in atomic context?

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Message-ID: <f22d86810910132336r1d6f6363qa983b355676dc413@mail.gmail.com>
Date:	Tue, 13 Oct 2009 23:36:01 -0700
From:	"Leonidas ." <leonidas137@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: How to check whether executing in atomic context?

Hi List,

I am working on a profiler kind of module, the exported apis of my
module can be
called from process context and interrupt context as well. Depending on the
context I am called in, I need to call sleepable/nonsleepable variants
of my internal
bookkeeping functions.

I am aware of in_interrupt() call which can be used to check current
context and take action
accordingly.

Is there any api which can help figure out whether we are executing
while hold a spinlock? I.e
an api which can help figure out sleepable/nonsleepable context? If it
is not there, what can
be done for writing the same? Any pointers will be helpful.

-Leo.
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