linux-kernel - Re: [PATCH 0/4] xtensa: fix build failure

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Date:	Wed, 9 Sep 2015 15:52:11 +0300
From:	Max Filippov <jcmvbkbc@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	Chris Zankel <chris@...kel.net>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@....de>,
	"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH 0/4] xtensa: fix build failure

On Wed, Sep 9, 2015 at 10:11 AM, Sudip Mukherjee
<sudipm.mukherjee@...il.com> wrote:
> On Tue, Sep 08, 2015 at 08:34:56PM +0300, Max Filippov wrote:
>> Sudip,
>>
>> On Tue, Sep 8, 2015 at 4:18 PM, Sudip Mukherjee
>> <sudipm.mukherjee@...il.com> wrote:
>> > While building with allmodconfig the build failed with different dma
>> > related errors. It turned out that the dma functions were moved to
>> > asm-generic/dma-mapping-common.h() and as a result we were getting the
>> > errors of "redefinition".
>> > This patch series will move the functions as required and at the end of
>> > the series, allmodconfig builds.
>>
>> I believe it's fixed in the -mm tree and will be merged soon,
>> see the thread at https://lkml.org/lkml/2015/8/26/118
>
> I guess its already merged in Linus tree now. I tested in the morning
> with Linus tree and allmodconfig worked. But next-20150909 still failed.

AFAICS it's not merged yet: arch/xtensa/include/dma-mapping.h still
has all functions deleted by patch in the mentioned thread.

> BTW, yesterday when I was testing few of the defconfigs were not
> working. Are they also being fixed?

There are many ways they can possibly fail, but mostly build errors are
caused by using wrong compiler. For more details please refer to
http://wiki.linux-xtensa.org/index.php/Linux_Kernel#Configuring_and_building_the_kernel

-- 
Thanks.
-- Max
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