Re: [PATCH 3/3] mm/memory-failure: Cast index to loff_t before shifting it

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On Mon, Dec 18, 2023 at 01:58:37PM +0000, Matthew Wilcox (Oracle) wrote:
> On 32-bit systems, we'll lose the top bits of index because arithmetic
> will be performed in unsigned long instead of unsigned long long.  This
> affects files over 4GB in size.
> 
> Fixes: 6100e34b2526 ("mm, memory_failure: Teach memory_failure() about dev_pagemap pages")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>




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