Please apply commit 0828137e8f16 ("powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()") to v4.14.y, v4.19.y, v5.4.y, v5.7.y

[Michael Ellerman]

Greg KH <gregkh at linuxfoundation.org> writes:
> On Tue, Aug 25, 2020 at 07:44:08PM -0300, Thadeu Lima de Souza Cascardo wrote:
>> After commit 912c0a7f2b5daa3cbb2bc10f303981e493de73bd ("powerpc/64s: Save FSCR
>> to init_task.thread.fscr after feature init"), which has been applied to the
>> referred branches, when userspace sets the user DSCR MSR, it won't be inherited
>> or restored during context switch, because the facility unavailable interrupt
>> won't trigger.
>> 
>> Applying 0828137e8f16721842468e33df0460044a0c588b ("powerpc/64s: Don't init
>> FSCR_DSCR in __init_FSCR()") will fix it.

Oops, thanks for catching it.

Acked-by: Michael Ellerman <mpe at ellerman.id.au>


> Now queued up, thanks.

Thanks.

cheers