Messages in this thread | | | Date | Thu, 16 Feb 2006 22:55:05 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 0/6] lightweight robust futexes: -V3 |
| |
* Christopher Friesen <cfriesen@nortel.com> 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |