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Mathieu Desnoyers authored
Document membarrier ordering scenarios in membarrier.c. Thanks to Alan Stern for refreshing my memory. Now that I have those in mind, it seems appropriate to serialize them to comments for posterity. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201020134715.13909-4-mathieu.desnoyers@efficios.com
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