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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2018-05-14 16:33:44 -0700
committerIngo Molnar <mingo@kernel.org>2018-05-15 08:11:16 +0200
commitbfd403bb3617e17a272e1189e5c76253052c22b8 (patch)
treec533bf77d34ea9302ef4ec4a5476ee995b640fca /tools/memory-model
parent35bb6ee6790600d29c598ebbf262359341f34e38 (diff)
downloadlinux-bfd403bb3617e17a272e1189e5c76253052c22b8.tar.bz2
tools/memory-order: Update the cheat-sheet to show that smp_mb__after_atomic() orders later RMW operations
The current cheat sheet does not claim that smp_mb__after_atomic() orders later RMW atomic operations, which it must, at least against earlier RMW atomic operations and whatever precedes them. This commit therefore adds the needed "Y". 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: Peter Zijlstra <peterz@infradead.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/1526340837-12222-6-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/Documentation/cheatsheet.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/memory-model/Documentation/cheatsheet.txt b/tools/memory-model/Documentation/cheatsheet.txt
index 46fe79afc737..33ba98d72b16 100644
--- a/tools/memory-model/Documentation/cheatsheet.txt
+++ b/tools/memory-model/Documentation/cheatsheet.txt
@@ -14,7 +14,7 @@ smp_wmb() Y W Y Y W
smp_mb() & synchronize_rcu() CP Y Y Y Y Y Y Y Y
Successful full non-void RMW CP Y Y Y Y Y Y Y Y Y Y Y
smp_mb__before_atomic() CP Y Y Y a a a a Y
-smp_mb__after_atomic() CP a a Y Y Y Y Y
+smp_mb__after_atomic() CP a a Y Y Y Y Y Y
Key: C: Ordering is cumulative