Re: [PATCH v2 4/6] mm: drop HIGHPTE support altogether

[Mike Rapoport <rppt@kernel.org>]

On Thu, Nov 12, 2026 at 12:25:26PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> With both x86 and arm having dropped CONFIG_HIGHPTE support, no
> architecture is left using it, so remove the remnants in common code.
> 
> It is likely that further cleanups are possible in the page table
> code but those are not obvious from the config options.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  include/linux/hugetlb.h | 5 +----
>  include/linux/mm.h      | 1 -
>  include/linux/pgtable.h | 9 ---------
>  3 files changed, 1 insertion(+), 14 deletions(-)

With this and arm HIGHPTE patches applied there are still a few leftovers:

$ git grep  HIGHPTE
arch/arm/configs/vt8500_v6_v7_defconfig:CONFIG_HIGHPTE=y
mm/memory.c:     * Dumping the PTE would be nice, but it's tricky with CONFIG_HIGHPTE,
mm/pgtable-generic.c: * kmapped if necessary (when CONFIG_HIGHPTE), and locked against concurrent
mm/userfaultfd.c:        * index ordering when CONFIG_HIGHPTE is enabled. We mapped dst_pte

Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

-- 
Sincerely yours,
Mike.