On 05/01/2024 4:09 pm, Tamas K Lengyel wrote:
> On Fri, Jan 5, 2024 at 2:34 AM Jan Beulich <jbeul...@suse.com> wrote:
>> On 04.01.2024 18:13, Tamas K Lengyel wrote:
>>> Fix warning:
>>> (XEN) UBSAN: Undefined behaviour in arch/x86/cpu/mwait-idle.c:1300:44
>>> (XEN) left shift of 15 by 28 places cannot be represented in type 'int'
>>>
>>> Signed-off-by: Tamas K Lengyel <tamas.leng...@intel.com>
>>> Fixes: 5a211704e88 ("mwait-idle: prevent SKL-H boot failure when C8+C9+C10
>>> enabled")
>> No matter that I appreciate the change, I think this wants fixing by a
>> patch to the (Linux) original, which we'd then import (like we do for
>> other changes, including the one referenced by the Fixes: tag).
> Feel free to submit it to other projects if the same issue applies to
> them. I only ran into this with Xen and can only test it with Xen.
Linux is affected by this, but a fix to Linux won't apply to Xen because
Xen already diverged from Linux in this function.
~Andrew
