Re: [PATCH 06/11] x86/virt/guest/xen: Remove use of pgd_list from the Xen guest code

[Linus Torvalds]

On Mon, Sep 21, 2015 at 11:23 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> xen_mm_pin_all()/unpin_all() are used to implement full guest instance
> suspend/restore. It's a stop-all method that needs to iterate through
> all allocated pgds in the system to fix them up for Xen's use.

And _this_ is why I'd reall ylike that "for_each_mm()" helper.

Yeah, yeah, maybe it would require syntax like

    for_each_mm (tsk, mm) {
        ...
    } end_for_each_mm(mm);

to do variable allocation things or cleanups (ie "end_for_each_mm()"
might drop the task lock etc), but wouldn't that still be better than
this complex boilerplate thing?

                    Linus
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