linux-kernel - Re: next-20150716 build: 4 failures 88 warnings (next-20150716)

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Message-ID: <20150716134152.GJ4039@sirena.org.uk>
Date:	Thu, 16 Jul 2015 14:41:52 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Toshi Kani <toshi.kani@...com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Cc:	kernel-build-reports@...ts.linaro.org,
	linaro-kernel@...ts.linaro.org, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: next-20150716 build: 4 failures 88 warnings (next-20150716)

On Thu, Jul 16, 2015 at 11:05:11AM +0100, Build bot for Mark Brown wrote:

Today's linux-next fails to build an arm64 allnoconfig due to "mm: make
GUP handle pfn mapping unless FOLL_GET is requested" which causes:

> 	arm64-allnoconfig
> ../mm/gup.c:51:4: error: implicit declaration of function 'update_mmu_cache' [-Werror=implicit-function-declaration]

The update_mmu_cache() function is defined unconditionally in
asm/tlbflush.h so there is presumably some path of conditional
inclusions which causes it not to get declared in an allnoconfig - I
didn't chase that down yet.

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