The remainder of the patch series proposed by upstream [2] for the locking synchronization issue [1]. [1] https://www.openwall.com/lists/musl/2020/05/22/3 [2] https://www.openwall.com/lists/musl/2020/05/22/10 Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>