On 2018-10-29 8:18 a.m., Thomas-Mich Richter wrote: > Yes, mistake on my side... > but it is the same type of error , regardless if 6 or 7 characters are > compared: > > strncmp("cpmu_cf", "cpum_cf_diag", 7) > > returns 0 when it should not. The device names of both PMUs are different. > OK, that works then. You want to do a full-length comparison of PMU names, instead of comparing prefixes. Reviewed-by: Sebastien Boisvert <sboisvert@xxxxxxxxx>