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Instead of calling BUG() at runtime introduce and use a prototype for a non-existing function to produce a link error during compile when a not supported opcode is used with the __cpacf_query() or __cpacf_check_opcode() inline functions. Suggested-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Holger Dengler <dengler@linux.ibm.com> Reviewed-by: Juergen Christ <jchrist@linux.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens <hca@linux.ibm.com>