[libc-commits] [libc] [libc][rwlock] fix timeout writer signal stealing problem (PR #201937)

[Pavel Labath via libc-commits]

https://github.com/labath approved this pull request.

I'm new to this code, but the explanation of the problem and the fix both make sense to me.

I left some stylistic comments, but take them with a grain of salt. This is just how I would prefer to see the code, and it's not my intention to override existing conventions.

https://github.com/llvm/llvm-project/pull/201937