cache_disable
void (*cache_disable)(void) = (void *)_arg;
cache_disable();
int __init mcpm_loopback(void (*cache_disable)(void))
ret = cpu_suspend((unsigned long)cache_disable, nocache_trampoline);
int __init mcpm_loopback(void (*cache_disable)(void));
void cache_disable(void);
cache_disable();
cache_disable();