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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
 Stephen Rothwell <sfr@canb.auug.org.au>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 linuxppc-dev@lists.ozlabs.org
Cc: Michael Neuling <mikey@neuling.org>, linux-next@vger.kernel.org,
 linux-kernel@vger.kernel.org
Subject: Re: linux-next: build failure after merge of the powerpc tree
In-Reply-To: <1452162650.5826.2.camel@ellerman.id.au>
References: <20160107191613.0228560b@canb.auug.org.au>
 <1452162650.5826.2.camel@ellerman.id.au>
Date: Wed, 13 Jan 2016 11:16:10 +0530
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Michael Ellerman <mpe@ellerman.id.au> writes:

> On Thu, 2016-01-07 at 19:16 +1100, Stephen Rothwell wrote:
>> Hi all,
>> 
>> After merging the powerpc tree, today's linux-next build (powerpc64
>> allnoconfig) failed like this:
>> 
>> arch/powerpc/mm/hash_utils_64.c: In function 'get_paca_psize':
>> arch/powerpc/mm/hash_utils_64.c:869:19: error: 'struct paca_struct' has no member named 'context'
>>   return get_paca()->context.user_psize;
>>                    ^
>> arch/powerpc/mm/hash_utils_64.c:870:1: error: control reaches end of non-void function [-Werror=return-type]
>>  }
>>  ^
>> 
>> Caused by commit
>> 
>>   2fc251a8dda5 ("powerpc: Copy only required pieces of the mm_context_t to the paca")
>
> Well that's rather embarrassing, for Mikey ;D
>
>> This build has CONFIG_PPC_MM_SLICES not set ...
>
> Ugh, but it would seem none of our defconfigs do :/

4K page size with hugetlb disabled will get that 

-aneesh