linux-kernel - Re: [PATCH] blackfin: include: asm: pgtable: Define dummy pgprot

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Date:	Sun, 5 Apr 2015 06:54:58 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Richard Weinberger <richard@....at>
CC:	realmz6@...il.com,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"adi-buildroot-devel@...ts.sourceforge.net" 
	<adi-buildroot-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH] blackfin: include: asm: pgtable: Define dummy pgprot_writecombine

On 4/5/15 06:04, Richard Weinberger wrote:
> Am 05.04.2015 um 00:02 schrieb Chen Gang:
>> On 4/4/15 06:50, Richard Weinberger wrote:
>>> This looks fishy as blackfin's pgtable.h already includes asm-generic/pgtable.h.
>>> So, copy&pasting pgprot_writecombine shouldn't be needed.
>>>
>>
>> pgprot_writecombine in asm-generic/pgtable.h needs MMU, but allmodconfig
>> for blackfin is NOMMU.
>>
>> So, I still suggest to add dummy one in blackfin (although for me, asm-
>> generic/pgtable.h may need improvement -- welcome other members for it).
> 
> Sounds still fishy as you "introduced" allmodconfig...
> 

The related allmodconfig config file is in attchment, at least we can
treate it as a random config -- put it as .config to root source code,
then make menuconfig and exit, .config has no changes in next-20150401.

It can still generate this issue (after bypass gcc issues):


Thanks.
-- 
Chen Gang

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

View attachment "config_gchen" of type "text/plain" (140268 bytes)