Re: [RFC PATCH 0/2] futex: how to solve the robust_list race condition?

[Florian Weimer]

* Mathieu Desnoyers:

> Of course, we'd have to implement the whole transaction in assembler
> for each architecture.

Could this be hidden ina vDSO call?  It would have to receive a pointer
to the rseq area in addition to other arguments that identify the unlock
operation to be performed.  The advantage is that the kernel would now
the addresses involved, so a single rseq flag should be sufficient.  It
could also vary the LL/SC sequence based on architecture capabilities.

The question is whether we can model the unlock operation so that it's
sufficiently generic.

Thanks,
Florian