Instead of using CMM_ACCESS_ONCE() with memory barriers, use __atomic
builtins with relaxed memory ordering to implement CMM_LOAD_SHARED() and
CMM_STORE_SHARED().
Signed-off-by: Ondřej Surý <ond...@sury.org>
---
include/urcu/system.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/urcu/system.h b/include/urcu/system.h
index faae390..4302253 100644
--- a/include/urcu/system.h
+++ b/include/urcu/system.h
@@ -26,7 +26,7 @@
* Identify a shared load. A cmm_smp_rmc() or cmm_smp_mc() should come
* before the load.
*/
-#define _CMM_LOAD_SHARED(p) CMM_ACCESS_ONCE(p)
+#define _CMM_LOAD_SHARED(p) __atomic_load_n(&(p), __ATOMIC_RELAXED)
/*
* Load a data from shared memory, doing a cache flush if required.
@@ -42,7 +42,7 @@
* Identify a shared store. A cmm_smp_wmc() or cmm_smp_mc() should
* follow the store.
*/
-#define _CMM_STORE_SHARED(x, v) __extension__ ({ CMM_ACCESS_ONCE(x) =
(v); })
+#define _CMM_STORE_SHARED(x, v) __extension__ ({ __atomic_store_n(&(x),
v, __ATOMIC_RELAXED); v; })
/*
* Store v into x, where x is located in shared memory. Performs the
--
2.39.2
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