linux-kernel - Re: linux-next: build failure after merge of the access

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Message-ID: <5484C3B9.2030909@de.ibm.com>
Date:	Sun, 07 Dec 2014 22:16:41 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: build failure after merge of the access_once tree

Am 07.12.2014 um 21:57 schrieb Christian Borntraeger:
> Am 05.12.2014 um 11:32 schrieb Stephen Rothwell:
>> Hi Christian,
>>
>> After merging the access_once tree, today's linux-next build (x86_64
>> allmodconfig) failed like this:
>>
>> In file included from include/linux/compiler.h:189:0,
>>                  from include/uapi/linux/stddef.h:1,
>>                  from include/linux/stddef.h:4,
>>                  from include/uapi/linux/posix_types.h:4,
>>                  from include/linux/fdtable.h:8,
>>                  from security/apparmor/domain.c:16:
>> include/linux/types.h:14:9: error: unknown type name '__kernel_fd_set'
>>  typedef __kernel_fd_set  fd_set;
>>          ^
>>
>> And many more :-(
>>
>> Presumably caused by commit b06f66134856 ("kernel: Provide READ_ONCE
>> and ASSIGN_ONCE") which added types.h into compiler.h, but I am not
>> sure.  It could be an interaction with something else in linux-next, of
>> course.
>>
>> I have dropped the access_once tree for today, sorry.
>>
> 
> Interesting, I double checked with defconfig and cross compilation. But yes, using allmodconfig fails.
> I have changed that to uapi/linux/types.h and __u<xx>. This seems to fix it as it only adds a small set of types.
> 
> Can you re-add?
> 
> Christian
> 

I also did an additional check and merged this tree with linux-next/master. This introduced a new problem.
The fix is simple, see patch. But I am not sure how to add that to next (via my tree), since this change is only in next.

Christian

View attachment "0001-x86-xen-p2m-Replace-ACCESS_ONCE-with-READ_ONCE.patch" of type "text/x-patch" (1114 bytes)