[PATCH] mm: remove kern_addr_valid() completely

[Catalin Marinas]

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 at huawei.com>

For arm64:

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