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diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
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+++ b/Documentation/memory-barriers.txt
@@ -14,7 +14,11 @@ DISCLAIMER
This document is not a specification; it is intentionally (for the sake of
brevity) and unintentionally (due to being human) incomplete. This document is
meant as a guide to using the various memory barriers provided by Linux, but
-in case of any doubt (and there are many) please ask.
+in case of any doubt (and there are many) please ask. Some doubts may be
+resolved by referring to the formal memory consistency model and related
+documentation at tools/memory-model/. Nevertheless, even this memory
+model should be viewed as the collective opinion of its maintainers rather
+than as an infallible oracle.
To repeat, this document is not a specification of what Linux expects from
hardware.