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Message-ID: <29495f1d0606061130s5451db8r102c7e1e75981994@mail.gmail.com>
Date: Tue, 6 Jun 2006 11:30:51 -0700
From: "Nish Aravamudan" <nish.aravamudan@gmail.com>
To: "Jesper Juhl" <jesper.juhl@gmail.com>
Subject: Re: Backport of a 2.6.x USB driver to 2.4.32 - help needed
Cc: "Heiko Gerstung" <heiko.gerstung@meinberg.de>,
       linux-kernel@vger.kernel.org
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On 6/6/06, Jesper Juhl <jesper.juhl@gmail.com> wrote:
> On 06/06/06, Heiko Gerstung <heiko.gerstung@meinberg.de> wrote:
> > Hi!
> >
> > Short Version (tm): I try to backport a USB driver (rtl8150.c) from
> > 2.6.15.x to 2.4.32 and have no idea how to substitue two functions:
> > in_atomic() and schedule_timeout_uninterruptible() ... I really would
> > appreciate any help, because I am no kernel hacker at all ...
> >
> in_atomic() is used to test if the kernel is in a state where sleeping
> is allowed or not. The 2.4.x kernel is not preemptive and has quite
> coarse grained SMP support (the BKL "Big Kernel Lock"), it didin't
> need in_atomic() in the same way as 2.6.x does.
>
> schedule_timeout_uninterruptible() is used to sleep on a wait-queue,
> which 2.4.x does not have.

schedule_timeout_uninterruptible(timeout_value) is just a wrapper for

set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(timeout_value);

Maybe you were thinking of sleep_on*()?

Thanks,
Nish