stm_ftrace
} stm_ftrace = {
struct stm_ftrace *stm = container_of(export, struct stm_ftrace, ftrace);
struct stm_ftrace *sf = container_of(data, struct stm_ftrace, data);
struct stm_ftrace *sf = container_of(data, struct stm_ftrace, data);
stm_ftrace.data.nr_chans = roundup_pow_of_two(num_possible_cpus());
ret = stm_source_register_device(NULL, &stm_ftrace.data);
stm_source_unregister_device(&stm_ftrace.data);