linux-kernel - Re: [PATCH] mm/mmap.c: silence variable 'new

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Message-ID: <20190724143445.ezii7bwbbxxxtu2k@black.fi.intel.com>
Date:   Wed, 24 Jul 2019 17:34:46 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     akpm@...ux-foundation.org, mhocko@...e.com, vbabka@...e.cz,
        yang.shi@...ux.alibaba.com, jannh@...gle.com, walken@...gle.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm/mmap.c: silence variable 'new_start' set but not used

On Wed, Jul 24, 2019 at 02:07:39PM +0000, YueHaibing wrote:
> 'new_start' is used in is_hugepage_only_range(),
> which do nothing in some arch. gcc will warning:

Make is_hugepage_only_range() reference the variable on such archs:

#define is_hugepage_only_range(mm, addr, len)   ((void) addr, 0)

-- 
 Kirill A. Shutemov