Commit-ID: bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b Gitweb: https://git.kernel.org/tip/bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b Author: Andrea Parri <andrea.pa...@amarulasolutions.com> AuthorDate: Mon, 14 May 2018 16:33:45 -0700 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 15 May 2018 08:11:16 +0200
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 <pbonz...@redhat.com> Suggested-by: Peter Zijlstra <pet...@infradead.org> Signed-off-by: Andrea Parri <andrea.pa...@amarulasolutions.com> Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com> Acked-by: Alan Stern <st...@rowland.harvard.edu> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Will Deacon <will.dea...@arm.com> Cc: aki...@gmail.com Cc: boqun.f...@gmail.com Cc: dhowe...@redhat.com Cc: j.algl...@ucl.ac.uk Cc: linux-a...@vger.kernel.org Cc: luc.maran...@inria.fr Cc: npig...@gmail.com Cc: parri.and...@gmail.com Link: http://lkml.kernel.org/r/1526340837-12222-7-git-send-email-paul...@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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 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} ; }
