Re: [PATCH 2/4] powerpc/mm: map shared vmemmap tail pages as read-only

On Mon, Oct 19, 2026 at 05:08:28PM +0800, Muchun Song wrote:

PowerPC radix uses an architecture-specific vmemmap population path for
shared tail mappings, so it does not inherit the read-only protection added
to the common path.

Protect these mappings as well so illegal writes fault instead of
corrupting metadata shared by multiple tail pages.

Signed-off-by: Muchun Song <redacted>
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Nothing jumped out at me, feel free to add:

Reviewed-by: Lance Yang <lance.yang@linux.dev>