Re: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct pt_regs"

[Oleg Nesterov]

On 08/04, Oleg Nesterov wrote:
>
> On 08/04, Denys Vlasenko wrote:
> >
> > "why do we need percpu old_rsp thingy?" in particular.
>
> See thread_struct->usersp, current_user_stack_pointer().

Btw, perhaps it makes sense to document that task_pt_regs(current)->sp
is not current_user_stack_pointer() inside system_call_fastpath.

Oleg.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/