Says that 'smp_store_mb(x, val);' is _semantically_ equivalent to
'WRITE_ONCE(x, val); smp_mb();'.
Suggested-by: Paolo Bonzini <pbonz...@redhat.com>
Suggested-by: Peter Zijlstra <pet...@infradead.org>
Signed-off-by: Andrea Parri <andrea.pa...@amarulasolutions.com>
---
tools/memory-model/linux-kernel.def | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/memory-model/linux-kernel.def
b/tools/memory-model/linux-kernel.def
index 397e4e67e8c84..acf86f6f360a7 100644
--- a/tools/memory-model/linux-kernel.def
+++ b/tools/memory-model/linux-kernel.def
@@ -14,6 +14,7 @@ smp_store_release(X,V) { __store{release}(*X,V); }
smp_load_acquire(X) __load{acquire}(*X)
rcu_assign_pointer(X,V) { __store{release}(X,V); }
rcu_dereference(X) __load{once}(X)
+smp_store_mb(X,V) { __store{once}(X,V); __fence{mb}; }
// Fences
smp_mb() { __fence{mb} ; }
--
2.7.4
