if (ppc_md.machine_kexec_prepare) {
if (ppc_md.machine_kexec_prepare)
int machine_kexec_prepare(struct kimage *image){	if (ppc_md.machine_kexec_prepare) {		return ppc_md.machine_kexec_prepare(image);	}	/*	 * Fail if platform doesn't provide its own machine_kexec_prepare	 * implementation.	 */	return -ENOSYS;}