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4fe3b8b8db
My r16-3810-g6456da6bab8a2c changes broke bootstrap for targets that use the mutex-based atomic helpers. This fixes it by casting away the unnecessary volatile-qualification on the _Atomic_word* before passing it to __exchange_and_add_single. libstdc++-v3/ChangeLog: * config/cpu/generic/atomicity_mutex/atomicity.h (__exchange_and_add): Use const_cast to remove volatile.
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