From: Andrea Parri <andrea.parri@amarulasolutions.com>
To: linux-kernel@vger.kernel.org
Cc: Alan Stern <stern@rowland.harvard.edu>,
Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Boqun Feng <boqun.feng@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
Jade Alglave <j.alglave@ucl.ac.uk>,
Luc Maranget <luc.maranget@inria.fr>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Akira Yokosawa <akiyks@gmail.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Andrea Parri <andrea.parri@amarulasolutions.com>
Subject: [PATCH 1/2] tools/memory-model: Model 'smp_store_mb()'
Date: Thu, 12 Apr 2018 14:22:49 +0200 [thread overview]
Message-ID: <1523535770-10781-2-git-send-email-andrea.parri@amarulasolutions.com> (raw)
In-Reply-To: <1523535770-10781-1-git-send-email-andrea.parri@amarulasolutions.com>
Says that 'smp_store_mb(x, val);' is _semantically_ equivalent to
'WRITE_ONCE(x, val); smp_mb();'.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrea Parri <andrea.parri@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
next prev parent reply other threads:[~2018-04-12 12:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-12 12:22 [PATCH 0/2] " Andrea Parri
2018-04-12 12:22 ` Andrea Parri [this message]
2018-04-12 12:22 ` [PATCH 2/2] tools/memory-model: Fix coding style in 'linux-kernel.def' Andrea Parri
2018-04-12 21:06 ` [PATCH 0/2] tools/memory-model: Model 'smp_store_mb()' Paul E. McKenney
2018-04-13 10:04 ` Andrea Parri
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