machdep_calls
extern struct machdep_calls ppc_md;
extern struct machdep_calls *machine_id;
extern struct machdep_calls mach_##name; \
struct machdep_calls mach_##name __machine_desc =
static inline bool __machine_is(const struct machdep_calls *md)
extern struct machdep_calls mach_##name __weak; \
extern struct machdep_calls __machine_desc_start;
extern struct machdep_calls __machine_desc_end;
memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
struct machdep_calls ppc_md;
struct machdep_calls *machine_id;