Re: [patch 0/6] lightweight robust futexes: -V3

[Ingo Molnar]

* Christopher Friesen <cfriesen@xxxxxxxxxx> wrote:

> Ingo Molnar wrote:
> 
> >basically, ->futex_offset is not blindly trusted by the kernel either: 
> >it's simply used to calculate a "userspace pointer" value, which it then 
> >uses in a (secure) get_user() access, to do a FUTEX_WAKEUP. [Note that 
> >FUTEX_WAKEUP is already done at do_exit() time via the ->clear_child_tid 
> >userspace pointer.] All in one: this is totally safe.
> 
> As mentioned by Paul...how do you deal with 32/64 compatibility where 
> your pointers are different sizes?

i just replied to Paul's mail with details about this. (Please reply to 
that mail if there are any open questions.)

	Ingo
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