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* SMP: Add Mellor-Crummey and Scott (MCS) lockSebastian Huber2016-05-191-0/+262
Added only for evaluation purposes. We have to compare the performance against the ticket lock on the interesting platforms via smptests/smplock01. The following GCC shortcoming affects the MCS lock: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66867