Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy()

From: Andy Lutomirski
Date: Fri Jan 08 2016 - 20:49:54 EST

On Jan 8, 2016 4:19 PM, "Tony Luck" <tony.luck@xxxxxxxxx> wrote:
> Make use of the EXTABLE_FAULT exception table entries. This routine
> returns a structure to indicate the result of the copy:

Perhaps this is silly, but could we make this feature depend on ERMS
and thus make the code a lot simpler?

Also, what's the sfence for? You don't seem to be using any
non-temporal operations.