On 09/08/2014 03:17 PM, One Thousand Gnomes wrote:

quoted

quoted

I think the whole "removing Alpha EV5" support is basically bonkers. Just
use set_bit in the tty layer. Alpha will continue to work as well as it
always has done and you won't design out support for any future processor
that turns out not to do byte aligned stores.

Alan

Is *that* what we are talking about?  I was added to this conversation
in the middle where it had already generalized, so I had no idea.

	-hpa

Yes there are some flags in the tty layer that are vulnerable to this
(although they've been vulnerable to it and missing a lock since last
century with no known ill effects).

That observation cuts both ways; I'm willing to leave it vulnerable with
'no known ill effects' on the Alpha.