[CRIU] Sync TODO-s for mount.c work

[Oleg Nesterov]

On 04/23, Pavel Emelyanov wrote:
>
> On 04/23/2015 02:17 PM, Oleg Nesterov wrote:
>
> > Now what? Obviously we can't just add
> >
> > 	if (is_not_external_mount(m))
> > 		continue;
>
> Why not? The is_not_external_mount() is
>
> fsroot_mounted(m) || /* mount's root is visible from chroot */

Yes, perhaps this can work as a first approximation, but afaics this
is not enough with MS_SLAVE...

Hmm. I can't check this because I can no longer compile criu after
git pull,

	make[1]: *** No rule to make target `include/asm-generic/page.h', needed by `arch/x86/crtools.o'.  Stop.
	make: *** [arch/x86/crtools.built-in.o] Error 2

Damn. I'll continue after I solve this problem...

Oleg.