Re: [PATCH v3 1/2] mm, swap: distinguish a malformed swap entry from a dying device

[David Hildenbrand (Arm)]

On 8/18/26 12:06, Breno Leitao wrote:
> get_swap_device() returns NULL for two different things: an entry whose
> type names no swap device or whose offset is past the end of one, and a
> device that swapoff is taking away. The first never becomes valid, the
> second does, and callers cannot tell them apart.
> 
> Return ERR_PTR(-EIO) for the two malformed cases and keep NULL for
> swapoff. copy_nonpresent_pte() already reports -EIO for an entry whose
> type names no device.
> 
> Callers bail out on failure either way, so switch them to
> IS_ERR_OR_NULL(), and let the two paths that drop the reference skip an
> error pointer. No functional change.
> 
> Reviewed-by: Barry Song <baohua@xxxxxxxxxx>
> Acked-by: Kairui Song <kasong@xxxxxxxxxxx>
> Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
> ---

Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

-- 
Cheers,

David