On Fri, Feb 9, 2018 at 5:05 PM, Linus Torvalds
> On Fri, Feb 9, 2018 at 1:25 AM, Joerg Roedel <j...@8bytes.org> wrote:
>> + /* Copy over the stack-frame */
>> + cld
>> + rep movsb
> Ugh. This is going to be horrendous. Maybe not noticeable on modern
> CPU's, but the whole 32-bit code is kind of pointless on a modern CPU.
> At least use "rep movsl". If the kernel stack isn't 4-byte aligned,
> you have issues.
The 64-bit code mostly uses a bunch of push instructions for this.