Re: [PATCH 08/16] mm/nommu: switch do_mmap_private to kernel_read

[Al Viro]

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?