Re: [PATCH mm-unstable v1 04/26] arm/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE

["Russell King (Oracle)" <linux@xxxxxxxxxxxxxxx>]

On Fri, Jan 13, 2023 at 06:10:04PM +0100, David Hildenbrand wrote:
> Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
> offset. This reduces the maximum swap space per file to 64 GiB (was 128
> GiB).
> 
> While at it drop the PTE_TYPE_FAULT from __swp_entry_to_pte() which is
> defined to be 0 and is rather confusing because we should be dealing
> with "Linux PTEs" not "hardware PTEs". Also, properly mask the type in
> __swp_entry().
> 
> Cc: Russell King <linux@xxxxxxxxxxxxxxx>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Reviewed-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>

Thanks.

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