Re: [PATCH] mm/mmap.c: silence variable 'new_start' set but not used

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To: YueHaibing <yuehaibing@xxxxxxxxxx>
Subject: Re: [PATCH] mm/mmap.c: silence variable 'new_start' set but not used
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Date: Wed, 24 Jul 2019 17:34:46 +0300
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, mhocko@xxxxxxxx, vbabka@xxxxxxx, yang.shi@xxxxxxxxxxxxxxxxx, jannh@xxxxxxxxxx, walken@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20190724140739.59532-1-yuehaibing@huawei.com>
References: <20190724140739.59532-1-yuehaibing@huawei.com>
User-agent: NeoMutt/20170714-126-deb55f (1.8.3)

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

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  - From: YueHaibing

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