[libc-commits] [libc] [libc] Use __builtin_ffsll for RPC lane mask (PR #85000)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 approved this pull request.

Thanks, maybe some day we'll have a 32-bit process communicating with some embedded magic using this interface. Theoretically the `rpc` code can be used for communication between anything that atomically shares an address space.

https://github.com/llvm/llvm-project/pull/85000