From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sudip Mukherjee <sudipm.mukherjee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH] watchdog: dw_wdt: dont build for avr32
Date: Tue, 12 Apr 2016 19:09:28 +0530
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References: <1460440303-20640-1-git-send-email-sudipm.mukherjee@gmail.com> <570CF2CB.2050200@roeck-us.net>
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To: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>, Wim Van Sebroeck <wim-IQzOog9fTRqzQB+pC5nmwQ@public.gmane.org>, Haavard Skinnemoen <hskinnemoen-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Hans-Christian Egtvedt <egtvedt-BrfabpQBY5qlHtIdYg32fQ@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

On Tuesday 12 April 2016 06:36 PM, Guenter Roeck wrote:
> On 04/11/2016 10:51 PM, Sudip Mukherjee wrote:
>> The build of avr32 allmodconfig fails with the error:
>> ERROR: "__avr32_udiv64" [drivers/watchdog/kempld_wdt.ko] undefined!
>>
> This means there is a direct 64 bit divide operation in the driver,
> which we should identify and fix.

yes, there is.

in function: kempld_wdt_set_stage_timeout()
remainder = do_div(stage_timeout64, prescaler);

Any idea how to fix it?

regards
sudip