Re: [PATCH v2 4/6] x86: Rewrite switch_to() code

Andy Lutomirski
2016-06-19T21:23:14Z

On Sat, Jun 18, 2016 at 1:56 PM, Brian Gerst <brgerst@gmail.com> wrote:
> Move the low-level context switch code to an out-of-line asm stub instead of
> using complex inline asm. This allows constructing a new stack frame for the
> child process to make it seamlessly flow to ret_from_fork without an extra
> test and branch in __switch_to(). It also improves code generation for
> __schedule() by using the C calling convention instead of clobbering all
> registers.

This is great. The conflict with my stack code is minimal enough that
I won't bother rebasing unless someone specifically wants me to.

Acked-by: Andy Lutomirski <luto@kernel.org>

--Andy