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From: "rodgertq at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/104442] atomic<T>::wait incorrectly loops in case of
 spurious notification when __waiter is shared
Date: Wed, 09 Feb 2022 15:29:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104442

--- Comment #4 from Thomas Rodgers <rodgertq at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> Tom submitted
> https://gcc.gnu.org/pipermail/gcc-patches/2022-February/590050.html alrea=
dy,
> which is slightly different.

The primary difference was changing the memory order of the load in _M_do_s=
pin.
I may revert that part of the change and submit it separately, as I've noti=
ced
one other case where I'd like to change it from RELAXED to SEQ_CST.=