Re: [PATCH 1/1] x86: Change mov $0, %reg with xor %reg, %reg

[Kanna Scarlet]

On 8/5/22 4:42 PM, Joerg Roedel wrote:
> On Fri, Aug 05, 2022 at 09:26:02AM +0000, David Laight wrote:
> > Use "xor %rax,%rax" instead of "xor %eax,%eax" to save
> > the 'reg' prefix.
>
> Also, some places explicitly use the mov variant to zero a register
> without touching rflags. Please be careful to not change those.

thank you for reminder, i will check again to make myself more sure
the patch doesn't break this %rflags dependency situation

Regards,
--
Kanna Scarlet