[PATCH] S/390: Fix two issues with the IFUNC optimized mem* routines

[David Miller]

From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 29 Aug 2012 08:13:11 -0700

> a1 definition can come from a different DSO at run-time.

You can't do that, a1 must have visibility private to the final linked
object.

There is no sense in trying to support this other case.

When you write IFUNC resolvers, you a linking together with the
implementations you intend to reference and use.

Any other usage really isn't worth supporting.