Re: [PATCH v5 04/27] x86/fpu/xstate: Add XSAVES system states for shadow stack

On Thu, Nov 08, 2018 at 02:01:42PM -0800, Andy Lutomirski wrote:

quoted

quoted

They both seem like bugs, perhaps.  As I understand it, __packed
removes padding, but it also forces the compiler to expect the fields
to be unaligned even if they are actually aligned.

How is that? Andy, mind to point where you get that this
attribute forces compiler to make such assumption?

It's from memory.  But gcc seems to agree with me I compiled this:

Indeed, thanks!