* Denys Vlasenko <[email protected]> wrote:
> PER_CPU(old_rsp) usage is simplified - now it is used only
> as temp storage, and userspace stack pointer is immediately stored
> in pt_regs->sp on syscall entry, instead of being used later,
> on syscall exit.
>
> All references of PER_CPU(old_rsp) in C code are gone -
> pt_regs->sp is used instead.
>
> This also allows to get rid of thread_struct::usersp,
> which was needed only to set PER_CPU(old_rsp) for
> correct return from fork/clone.
Would it be possible to split this one into two parts as well:
- Essential changes into the first one (old_rsp update
simplification, usersp usage conversion)
- Removal of usersp, old_rsp extern declaration removal, comment
changes, in the second patch?
Thanks,
Ingo
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