Rollup of 11 pull requests#150801

Closed

matthiaskrgr wants to merge 24 commits intorust-lang:mainfrom

matthiaskrgr:rollup-o7LL17D

Commits on Dec 14, 2025

Add waker_fn and local_waker_fn to std::task
tisonkun
committed

Commits on Dec 19, 2025

Commits on Jan 1, 2026

`c_variadic`: provide `va_arg` for more targets
folkertdev
committed

Commits on Jan 5, 2026

./x check miri: enable check_only feature
RalfJung
committed

Commits on Jan 7, 2026

Commits on Jan 8, 2026