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The latest version of this topic can be found at C28311.

warning 28311: The <annotation_name> annotation on <function> <parameter> is an obsolescent version of SAL.

The annotation is an old version and should be updated to the equivalent SAL2. This warning is not emitted if a prior inconsistent annotation warning has been emitted, and is reported only once per declaration. Inspect the rest of the declaration for more obsolete SAL.

Using SAL Annotations to Reduce C/C++ Code Defects