On Mon, Feb 13, 2017 at 6:34 AM, Peter Zijlstra <pet...@infradead.org> wrote: > On Fri, Feb 10, 2017 at 12:31:15AM -0800, tip-bot for Peter Zijlstra wrote: >> Commit-ID: f405df5de3170c00e5c54f8b7cf4766044a032ba >> Gitweb: >> http://git.kernel.org/tip/f405df5de3170c00e5c54f8b7cf4766044a032ba >> Author: Peter Zijlstra <pet...@infradead.org> >> AuthorDate: Mon, 14 Nov 2016 18:06:19 +0100 >> Committer: Ingo Molnar <mi...@kernel.org> >> CommitDate: Fri, 10 Feb 2017 09:04:19 +0100 >> >> refcount_t: Introduce a special purpose refcount type >> >> Provide refcount_t, an atomic_t like primitive built just for >> refcounting. >> >> It provides saturation semantics such that overflow becomes impossible >> and thereby 'spurious' use-after-free is avoided. >> >> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> > > --- > Subject: refcount: Out-of-line everything > From: Peter Zijlstra <pet...@infradead.org> > Date: Fri Feb 10 16:27:52 CET 2017 > > Linus asked to please make this real C code.
No objection from me, but I'm curious to see the conversation. Where did this discussion happen? (I'm curious to see the reasoning behind the decisions about the various trade-offs.) > And since size then isn't an issue what so ever anymore, remove the > debug knob and make all WARN()s unconditional. Are you still going to land the x86 WARN_ON improvements? -Kees -- Kees Cook Pixel Security
