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Date: Thu, 5 Apr 2018 04:23:57 -0700
From: Matthew Wilcox <willy@infradead.org>
To: Jia He <hejianet@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>,
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        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Jia He <jia.he@hxt-semitech.com>
Subject: Re: [PATCH v7 1/5] mm: page_alloc: remain memblock_next_valid_pfn()
 on arm and arm64
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On Thu, Apr 05, 2018 at 01:04:34AM -0700, Jia He wrote:
>  create mode 100644 include/linux/arm96_common.h

'arm96_common'?!  No.  Just no.

The right way to share common code is to create a header file (or use
an existing one), either in asm-generic or linux, with a #ifdef CONFIG_foo
block and then 'select foo' in the arm Kconfig files.  That allows this
common code to be shared, maybe with powerpc or x86 or ... in the future.