Re: s390(64) per_cpu in modules (ipv6)

[Roland Dreier]

    Martin> __attribute_used__ isn't really what we want. If a
    Martin> statically defined per cpu variable isn't used in the C
    Martin> file then gcc should be allowed to remove it. It's not
    Martin> used after all.  What we need is a way to tell the
    Martin> compiler that an inline assembly uses a variable without
    Martin> passing any kind of address of the variable to it.

Actually my understanding is that __attribute_used__ is intended for
exactly that: to let the compiler know that something that is
apparently unused by the C code is actually used by inline assembly.
I'm sure your solution is fine as well but I think this type of
situation is exactly what __attribute_used__ is for.  For example it
is attached to the modversions ____versions array so that it is not
discarded by the compiler.

Best,
  Roland
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