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To: stable <stable@vger.kernel.org>,
	Sasha Levin <sasha.levin@oracle.com>
From: Guenter Roeck <linux@roeck-us.net>
Subject: Build error in 3.18.y-stable-queue (s390)
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Date: Tue, 22 Mar 2016 20:42:53 -0700
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Hi Sasha,

s390 builds in v3.18.y-stable-queue fail as follows.

./arch/s390/include/asm/mmu_context.h: In function 'init_new_context':
./arch/s390/include/asm/mmu_context.h:33:3: error: implicit declaration of function 'mm_inc_nr_pmds'

Culprit appears to be 's390/mm: four page table levels vs. fork'. It uses mm_inc_nr_pmds(),
which does not exist in v3.18.

I noticed that arm64:allmodconfig builds fail as well, but that is not a new problem and
only seen with gcc 5.2 (or at least not with gcc 4.9.1). I'll see if I can track this down.

Guenter