On Thu, 07 Oct 2021 23:54:23 PDT (-0700), boqun.feng@gmail.com wrote:

On Fri, Oct 08, 2021 at 04:30:37PM +1100, Michael Ellerman wrote:

quoted

Boqun Feng [off-list ref] writes:

quoted

(Add linux-arch in Cc list)

Architecture maintainers, this patch is about strengthening our memory
model a little bit, your inputs (confirmation, ack/nack, etc.) are
appreciated.

Hi Boqun,

I don't feel like I'm really qualified to give an ack here, you and the
other memory model folk know this stuff much better than me.

But I have reviewed it and it matches my understanding of how our
barriers work, so it looks OK to me.

Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)

I'm basically in the same spot.  I think I said something to that effect 
somewhere in the thread, but I'm not sure if it got picked up so

Acked-by: Palmer Dabbelt <redacted> (RISC-V)

(I don't feel comfortable reviewing it so I'm acking it, not sure if I'm 
just backwards about what all this means though ;)).

IIUC this change will mean the RISC-V port is broken, but I'm happy to 
fix it.  Were you guys trying to target this for 5.16?