Re: [PATCH v2 1/2] arm64: Fix kernel address detection of __is_lm_address()

From: Vincenzo Frascino
Date: Thu Jan 21 2021 - 12:41:25 EST

On 1/21/21 4:02 PM, Vincenzo Frascino wrote:
>> I think it'd be worth checking, if we're going to use this in common
>> code.
> Ok, I will run some tests and let you know.

I checked on x86_64 and ppc64 (they both have KASAN implementation):

I added the following:

printk("%s: %d\n", __func__, virt_addr_valid(0));

in x86_64: sounds/last.c
in pp64: arch/powerpc/kernel/setup-common.c

and in both the cases the output is 0 (false) when the same in arm64 is 1
(true). Therefore I think we should proceed with the change.