Hi Rui, There are new compile warnings show up in tree: git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git next head: b72c93bc995ccca9928afb5243ca937758637af0 commit: ad06bdf3071e9b80bd049bbd174e570d0eff4571 [7/16] Thermal: Introduce .get_trend() callback. config: i386-randconfig-k006 (attached as .config) All warnings: drivers/acpi/thermal.c: In function 'thermal_get_trend': drivers/acpi/thermal.c:712:16: warning: unused variable 'trip_temp' [-Wunused-variable] -- drivers/thermal/thermal_sys.c: In function 'create_trip_attrs': drivers/thermal/thermal_sys.c:1216:3: error: 'count' undeclared (first use in this function) drivers/thermal/thermal_sys.c:1216:3: note: each undeclared identifier is reported only once for each function it appears in vim +712 drivers/acpi/thermal.c 709 { 710 struct acpi_thermal *tz = thermal->devdata; 711 enum thermal_trip_type type; > 712 unsigned long trip_temp; 713 int i; 714 715 if (thermal_get_trip_type(thermal, trip, &type)) --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation