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CVS commit: src/common/lib/libc/atomic
Module Name: src
Committed By: riastradh
Date: Sat Apr 9 23:38:57 UTC 2022
src/common/lib/libc/atomic: atomic_load.c atomic_store.c
libc/atomic: Fix membars in __atomic_load/store_* stubs.
- membar_enter/exit ordering was backwards.
- membar_enter doesn't make any sense for load anyway.
- Switch to membar_release for store and membar_acquire for load.
The only sensible orderings for a simple load or store are acquire or
release, respectively, or sequential consistency. This never
provided correct sequential consistency before -- we should really
make it conditional on memmodel but I don't know offhand what the
values of memmodel might be and this is at least better than before.
To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/common/lib/libc/atomic/atomic_load.c \
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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