[PATCH -tip 0/2] futex: Fault/error injection capabilities

[Davidlohr Bueso <dave@stgolabs.net>]

Hello,

I've been wanting this for a while to improve overall futex
testing. I must say that I checked rather late when I was
nearly finished with patch 2 if something similar for futexes
had already been proposed. Sure enough, in 2009 this was discussed[1].

Coincidently, I also took the natural approach of making use of
our fault-injection machinery. I have no idea if perf nowadays does
such things, and if it does not, I honestly don't have the bandwidth
to do it Ingo's preferred way -- when there is nothing wrong with
this approach, imho (0 overhead). Anyway, here's a working patch.

Patch 1 is merely a trivial add-on.

[1]: https://lwn.net/Articles/364742/

Thanks!

Davidlohr Bueso (2):
  futex: Enhance comments in futex_lock_pi() for blocking paths
  futex: Fault/error injection capabilities

 Documentation/fault-injection/fault-injection.txt |  11 +++
 kernel/futex.c                                    | 100 +++++++++++++++++++++-
 lib/Kconfig.debug                                 |   7 ++
 3 files changed, 114 insertions(+), 4 deletions(-)

-- 
2.1.4