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| author | Andrea Parri <andrea.parri@amarulasolutions.com> | 2018-05-14 16:33:45 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-05-15 08:11:16 +0200 |
| commit | bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b (patch) | |
| tree | e979685fee63eadc02aa3d361623f05c1ecaf378 /tools/memory-model | |
| parent | bfd403bb3617e17a272e1189e5c76253052c22b8 (diff) | |
tools/memory-model: Model 'smp_store_mb()'
This commit models 'smp_store_mb(x, val);' to be 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>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: akiyks@gmail.com
Cc: boqun.feng@gmail.com
Cc: dhowells@redhat.com
Cc: j.alglave@ucl.ac.uk
Cc: linux-arch@vger.kernel.org
Cc: luc.maranget@inria.fr
Cc: npiggin@gmail.com
Cc: parri.andrea@gmail.com
Link: http://lkml.kernel.org/r/1526340837-12222-7-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/memory-model')
| -rw-r--r-- | tools/memory-model/linux-kernel.def | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/memory-model/linux-kernel.def b/tools/memory-model/linux-kernel.def index 397e4e67e8c8..acf86f6f360a 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} ; } |