Re: [PATCH v3 03/13] x86/mm: Remove kernel_unmap_pages_in_pgd() and efi_cleanup_page_tables()

[Matt Fleming]

On Mon, 20 Jun, at 04:43:33PM, Andy Lutomirski wrote:
> kernel_unmap_pages_in_pgd() is dangerous: if a pgd entry in
> init_mm.pgd were to be cleared, callers would need to ensure that
> the pgd entry hadn't been propagated to any other pgd.
> 
> Its only caller was efi_cleanup_page_tables(), and that, in turn,
> was unused, so just delete both functions.  This leaves a couple of
> other helpers unused, so delete them, too.
> 
> Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-efi@xxxxxxxxxxxxxxx
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
> ---
>  arch/x86/include/asm/efi.h           |  1 -
>  arch/x86/include/asm/pgtable_types.h |  2 --
>  arch/x86/mm/pageattr.c               | 28 ----------------------------
>  arch/x86/platform/efi/efi.c          |  2 --
>  arch/x86/platform/efi/efi_32.c       |  3 ---
>  arch/x86/platform/efi/efi_64.c       |  5 -----
>  6 files changed, 41 deletions(-)

Looks fine.

Reviewed-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>