[PATCH -next 2/2] arm64/mm: fix page table check compile error for CONFIG_PGTABLE_LEVELS=2

[Catalin Marinas]

On Tue, May 17, 2022 at 07:45:48AM +0000, Tong Tiangen wrote:
> If CONFIG_PGTABLE_LEVELS=2 and CONFIG_ARCH_SUPPORTS_PAGE_TABLE_CHECK=y,
> then we trigger a compile error:
> 
>   error: implicit declaration of function 'pte_user_accessible_page'
> 
> Move the definition of page table check helper out of branch
> CONFIG_PGTABLE_LEVELS > 2
> 
> Fixes: daf214c14dbe ("arm64/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
> Signed-off-by: Tong Tiangen <tongtiangen at huawei.com>

I'd drop the fixes tag here since the patch is queued in the mm tree and
AFAIK that one doesn't have stable git commit ids. Otherwise:

Acked-by: Catalin Marinas <catalin.marinas at arm.com>

(I cc'ed Andrew and linux-mm as Andrew queued the original patches)