linux-kernel - Re: [PATCH] watchdog: dw

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Message-ID: <CAHp75Vd28EChCHs0YTKrF_31OsEzJcgX8XFRwMmy9WGOeukTMg@mail.gmail.com>
Date:	Tue, 12 Apr 2016 21:17:43 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Wim Van Sebroeck <wim@...ana.be>,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kernel-testers@...r.kernel.org, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH] watchdog: dw_wdt: dont build for avr32

On Tue, Apr 12, 2016 at 9:01 PM, Guenter Roeck <linux@...ck-us.net> wrote:
> On Tue, Apr 12, 2016 at 05:58:20PM +0300, Andy Shevchenko wrote:
>> On Tue, Apr 12, 2016 at 4:39 PM, Sudip Mukherjee
>> <sudipm.mukherjee@...il.com> wrote:
>> > On Tuesday 12 April 2016 06:36 PM, Guenter Roeck wrote:
>> >>

> Sorry, I am missing something. do_div() should work fine with any 32 bit value
> as divisor, no matter what that value is. Why does it fail here ? And why does
> it work if I pass 0x1fffff as second parameter to do_div() directly ?

Perhaps compare assembly code in both cases?



-- 
With Best Regards,
Andy Shevchenko