Re: [patch 8/8] x86/vdso: Implement __vdso_futex_robust_try_unlock()

[Thomas Gleixner]

On Tue, Mar 17 2026 at 23:32, Thomas Gleixner wrote:
> On Tue, Mar 17 2026 at 11:37, Florian Weimer wrote:
> Something like the below compiled but untested delta diff which includes
> also the other unrelated feedback fixups?

The more I look into it, the more I regret that we allowed mixed mode in
the first place. Which way I turn it around the code becomes more
horrible than it really should be.

If I understand it correctly then the only real world use case is the
x86 emulator for ARM64. That made me think about possible options to
keep the insanity restricted.

  1) Delegate the problem to the ARM64 people :)

  2) Make that mixed size mode depend on a config option

  3) Require that such a use case issues a prctl to switch into that
     special case mode.

or a combination of those.

Andre?