Re: [PATCH] mm: remove kern_addr_valid() completely

[Heiko Carstens]

On Tue, Oct 18, 2022 at 03:40:14PM +0800, Kefeng Wang wrote:
> Most architectures(except arm64/x86/sparc) simply return 1 for
> kern_addr_valid(), which is only used in read_kcore(), and it
> calls copy_from_kernel_nofault() which could check whether the
> address is a valid kernel address, so no need kern_addr_valid(),
> let's remove unneeded kern_addr_valid() completely.
> 
> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
> ---
...
>  arch/s390/include/asm/pgtable.h           |  2 -

For s390:
Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx>