(2) to provide a guide as to how to use the barriers that are available.
Note that an architecture can provide more than the minimum requirement
-for any particular barrier, but if the architecure provides less than
+for any particular barrier, but if the architecture provides less than
that, that architecture is incorrect.
Note also that it is possible that a barrier may be a no-op for an
This means that ACQUIRE acts as a minimal "acquire" operation and
RELEASE acts as a minimal "release" operation.
-A subset of the atomic operations described in atomic_ops.txt have ACQUIRE
-and RELEASE variants in addition to fully-ordered and relaxed (no barrier
-semantics) definitions. For compound atomics performing both a load and a
-store, ACQUIRE semantics apply only to the load and RELEASE semantics apply
-only to the store portion of the operation.
+A subset of the atomic operations described in core-api/atomic_ops.rst have
+ACQUIRE and RELEASE variants in addition to fully-ordered and relaxed (no
+barrier semantics) definitions. For compound atomics performing both a load
+and a store, ACQUIRE semantics apply only to the load and RELEASE semantics
+apply only to the store portion of the operation.
Memory barriers are only required where there's a possibility of interaction
between two CPUs or between a CPU and a device. If it can be guaranteed that
This makes sure that the death mark on the object is perceived to be set
*before* the reference counter is decremented.
- See Documentation/atomic_ops.txt for more information. See the "Atomic
- operations" subsection for information on where to use these.
+ See Documentation/core-api/atomic_ops.rst for more information. See the
+ "Atomic operations" subsection for information on where to use these.
(*) lockless_dereference();
barriers, and so barrier instructions are superfluous in conjunction with them,
and in such cases the special barrier primitives will be no-ops.
-See Documentation/atomic_ops.txt for more information.
+See Documentation/core-api/atomic_ops.rst for more information.
ACCESSING DEVICES