linux-kernel - Re: [PATCH] drivers: Let several drivers depends on HAS_IOMEM for 'devm_ioremap

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Date:	Thu, 17 Jul 2014 19:20:11 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	Thierry Reding <thierry.reding@...il.com>,
	Arnd Bergmann <arnd@...db.de>
CC:	Guenter Roeck <linux@...ck-us.net>,
	Richard Weinberger <richard@....at>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	dmitry.torokhov@...il.com, linux-iio@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>, teg@...m.no,
	Lennox Wu <lennox.wu@...il.com>, Marek Vasut <marex@...x.de>,
	Liqin Chen <liqin.linux@...il.com>, msalter@...hat.com,
	linux-pwm@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-watchdog@...r.kernel.org, linux-input@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	knaack.h@....de, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Mischa.Jonker@...opsys.com, jic23@...nel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Liqin Chen <liqin.linux@...il.com>,
	Lennox Wu <lennox.wu@...il.com>
Subject: Re: [PATCH] drivers: Let several drivers depends on HAS_IOMEM for
 'devm_ioremap_resource'



On 07/17/2014 06:55 PM, Thierry Reding wrote:
> On Thu, Jul 17, 2014 at 12:33:32PM +0200, Arnd Bergmann wrote:
>> On Thursday 17 July 2014 11:56:58 Thierry Reding wrote:
>>> On Thu, Jul 17, 2014 at 11:20:36AM +0200, Arnd Bergmann wrote:
>>> [...]
>>>>                       score should set HAS_IOMEM and doesn't
>>>> even have public compilers
>>>
>>> This begs an interesting question. Should it be made a requirement to
>>> have publicly available compilers for new architectures so that they can
>>> at least be compile-tested? Preferably this would of course be in source
>>> form so that there aren't any dependencies on the distribution.
>>
>> The question has come up a few times. I wouldn't mandate that the port
>> has an upstream gcc (you've got to start mainlining one of them first
>> after all), but having compilers available for download should probably be
>> required. It's hard to ask for a particular quality of that gcc port
>> though, or to expect it to stay available online.
>>
>> Where did you find the gcc port for score?
> 
> It's upstream, though marked obsolete and to be removed in the next
> release... =)
> 

For me, I get the latest gcc version and binutils source code, and fix 2
bugs (one for gas, which always generate core dump, the other for gcc
c-decl, fix it together with the other gcc members).

And I only finish compiling raw cross-compiler (--without-headers),
after make some patches, can let score pass allmodconfig.

At present, it seems the score cross-compiler still contents some issue
which I shall try to analyse (it is about link symbols), and maybe need
communicate with gcc/binutils members.


At present, the related score maintainers are still active in upstream
kernel, so we also need the related maintainers' ideas and suggestions.


Thanks
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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