Re: [PATCH] x86/shstk: Move arch detail comment out of core mm

On Thu, Jul 06, 2023 at 04:32:48PM -0700, Rick Edgecombe wrote:

The comment around VM_SHADOW_STACK in mm.h refers to a lot of x86
specific details that don't belong in a cross arch file. Remove these
out of core mm, and just leave the non-arch details.

Since the comment includes some useful details that would be good to
retain in the source somewhere, put the arch specifics parts in
arch/x86/shstk.c near alloc_shstk(), where memory of this type is
allocated. Include a reference to the existence of the x86 details near
the VM_SHADOW_STACK definition mm.h.

Reviewed-by: Mark Brown <broonie@kernel.org>