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Kyle Evans
df1b0f580d
This effectively reverts
6e824f3713 ("time: siginfo_recvd needs to be marked volatile")
because it was actually wrong. Switch to C11 signal fence, which
provides a compiler barrier that will do the right thing.
Reported by: kib
Reviewed by: kib (slightly earlier version)
Differential Revision: https://reviews.freebsd.org/D45574