Backport of a 2.6.x USB driver to 2.4.32 - help needed

[Heiko Gerstung <heiko.gerstung@meinberg.de>]

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 ...

Long Version (tm):
I have problems backporting a USB driver from 2.6.15.x to 2.4.32 and I
am at a total loss because I am not really a device driver hacker and it
seems that the original author/maintainer is currently very busy and has
no chance to support me in this case (although his support so far was
excellent!).

I still fight with the driver for Realtek 8150 based USB-to-Ethernet
products (drivers/usb/net/rtl8150.c in 2.6.x kernels,
/drivers/usb/rtl8150.c in the 2.4 kernel tree).

Under 2.4.32 this driver crashes (kernel panic) when I try to enslave a
network interface handled by it, with a 2.6 kernel there is no such
problem. Unfortunately I cannot go ahead with a 2.6 kernel at the
moment, because it lacks a properly running PPS support.

I therefore backported the 2.6.x driver to compile cleanly under 2.4.32
and it still crashes when I try to enslave such an interface in miimon
mode. I think there is a difference in the way the bonding module checks
 the MII link status of the device. The maintainer of the driver
modified a few things for me in order to address this problem ("it
happens because get/set_registers() are called with no process
context"), but he was only able to modify the 2.6.x driver for me.

I started to backport the modified version, but it seems that I ran into
dependency hell because I get the following two missing functions
reported when I try to compile the backported module:

rtl8150.c: In Funktion »rtl8150_get_settings«:
rtl8150.c:790: Warnung: implicit declaration of function `in_atomic'
rtl8150.c: In Funktion »rtl8150_thread«:
rtl8150.c:857: Warnung: implicit declaration of function
`schedule_timeout_uninterruptible'

Now I would need help in finding a way to substitute the two missing
functions in a 2.4 kernel environment and I desperately hope that
someone sees my dilemma and can help me somehow...

Anyway, thank you for spending the time to at least read this post (and
thanks a lot if you could spend a few cycles on thinking about a
possible solution!).

Kind regards,
Heiko



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