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Date:   Wed, 30 Aug 2017 16:41:28 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Christoph Hellwig <hch@....de>
Cc:     arve@...roid.com, riandrews@...roid.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/16] mm/nommu: switch do_mmap_private to kernel_read

On Wed, Aug 30, 2017 at 04:59:59PM +0200, Christoph Hellwig wrote:
> -		fpos = vma->vm_pgoff;
> -		fpos <<= PAGE_SHIFT;

> +		loff_t fpos = vma->vm_pgoff << PAGE_SHIFT;

Umm...  Are you sure it's OK on 32bit hosts?

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