elv_ioc_count_mod  198 include/linux/elevator.h #define elv_ioc_count_inc(name)	elv_ioc_count_mod(name, 1)
elv_ioc_count_mod  199 include/linux/elevator.h #define elv_ioc_count_dec(name)	elv_ioc_count_mod(name, -1)