linux-kernel - Is there a primitive to atomically release a spinlock and go to sleep?

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Message-ID: <AANLkTimZnUEM6FFbgw==K3w6hURAgsAO8uRh5W1v6f_j@mail.gmail.com>
Date:	Wed, 1 Sep 2010 20:04:24 -0500
From:	David Nicol <davidnicol@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Is there a primitive to atomically release a spinlock and go to sleep?

I'm trying to do something involving multiple kthreads in an ioctl
handler, and I want to avoid the
race condition between the third and fourth steps of

    acquire mutex
    add &self to a list of threads which will get awakened by
something else that is also aware of this list
    release mutex
    go to sleep

Is there a standard atomic go-to-sleep function that takes as a
parameter a pointer to  spinlock to release after its state is set to
TASK_INTERRUPTIBLE?
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