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The paravirt thunks use a hack of using a static reference to a static function to reference that function from the top level statement. This assumes that gcc always generates static function names in a specific format, which is not necessarily true. Simply make these functions global and asmlinkage or __visible. This way the static __used variables are not needed and everything works. Functions with arguments are __visible to keep the register calling convention on 32bit. Changed in paravirt and in all users (Xen and vsmp) v2: Use __visible for functions with arguments Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Ido Yariv <ido@wizery.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1382458079-24450-5-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>