b57db7581c
This fixes a bug that was introduced in the latest pthread optimization. It happens when a recursive lock is contented by several threads. The main issue was that the atomic counter increment in _recursive_increment() could be annihilated by a non-conditional write in pthread_mutex_lock() used to update the value's lower bits to indicate contention. This patch re-introduces the use of the global recursive lock in _recursive_increment(). This will hit performance, but a future patch will be provided to remove it from the source code. Change-Id: Ie22069d376cebf2e7d613ba00b6871567f333544