[PATCH v2 1/4] um: Add pthread-based helper support

[Johannes Berg]

On Tue, 2025-03-18 at 14:06 +0100, Johannes Berg wrote:
> On Thu, 2025-03-06 at 23:07 +0800, Tiwei Bie wrote:
> > Introduce a new set of utility functions that can be used to create
> > pthread-based helpers. Helper threads created in this way will ensure
> > thread safety for errno while sharing the same memory space.
> 
> Using pthreads seemed odd, but Benjamin argues that it's the only way to
> get libc to really sort it all out, unless we never use libc syscall
> functions, which is probably kind of unreasonable? Or maybe we could?

It's a long list of symbols that are needed:
https://p.sipsolutions.net/2f0c8e0de1e69147.txt

johannes