[kbuild-all] [chrome-os:chromeos-4.14 14/14] sound/soc/codecs/cs42l42.c:936:5: warning: no previous prototype for 'cs42l42_trigger'

tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.14 head: 972c48e87ad66b0893810f0b2d839fcd77e5e31e commit: 972c48e87ad66b0893810f0b2d839fcd77e5e31e [14/14] CHROMIUM: ASoC: cs42l42: Switch to SCLK in IRQ config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 7.5.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.14 git checkout 972c48e87ad66b0893810f0b2d839fcd77e5e31e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross W=1 ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from arch/m68k/include/asm/io_mm.h:27:0, from arch/m68k/include/asm/io.h:5, from include/linux/io.h:25, from include/linux/irq.h:25, from include/linux/gpio/driver.h:7, from include/asm-generic/gpio.h:13, from include/linux/gpio.h:52, from sound/soc/codecs/cs42l42.c:23: arch/m68k/include/asm/raw_io.h: In function 'raw_rom_outsb': arch/m68k/include/asm/raw_io.h:97:7: warning: variable '__w' set but not used [-Wunused-but-set-variable] ({u8 __w, __v = (b); u32 _addr = ((u32) (addr)); \ ^ arch/m68k/include/asm/raw_io.h:413:3: note: in expansion of macro 'rom_out_8' rom_out_8(port, *buf++); ^~~~~~~~~ arch/m68k/include/asm/raw_io.h: In function 'raw_rom_outsw': arch/m68k/include/asm/raw_io.h:100:8: warning: variable '__w' set but not used [-Wunused-but-set-variable] ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \ ^ arch/m68k/include/asm/raw_io.h:431:3: note: in expansion of macro 'rom_out_be16' rom_out_be16(port, *buf++); ^~~~~~~~~~~~ arch/m68k/include/asm/raw_io.h: In function 'raw_rom_outsw_swapw': arch/m68k/include/asm/raw_io.h:104:8: warning: variable '__w' set but not used [-Wunused-but-set-variable] ({u16 __w, __v = (w); u32 _addr = ((u32) (addr)); \ ^ arch/m68k/include/asm/raw_io.h:449:3: note: in expansion of macro 'rom_out_le16' rom_out_le16(port, *buf++); ^~~~~~~~~~~~ sound/soc/codecs/cs42l42.c: At top level: int cs42l42_trigger(struct snd_pcm_substream * substream, int cmd, struct snd_soc_dai *dai) ^~~~~~~~~~~~~~~ sound/soc/codecs/cs42l42.c: In function 'cs42l42_trigger': int ret; ^~~ sound/soc/codecs/cs42l42.c: In function 'cs42l42_handle_device_data': sound/soc/codecs/cs42l42.c:1805:12: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] if ((val >= CS42L42_BTN_DET_INIT_DBNCE_MIN) && ^~ sound/soc/codecs/cs42l42.c:1822:12: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] if ((val >= CS42L42_BTN_DET_EVENT_DBNCE_MIN) && ^~ sound/soc/codecs/cs42l42.c:1840:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] if ((thresholds[i] >= CS42L42_HS_DET_LEVEL_MIN) && ^~ vim +/cs42l42_trigger +936 sound/soc/codecs/cs42l42.c 935 937 { 938 struct snd_soc_component *component = dai->component; 939 struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component); 940 unsigned int regval; 942 unsigned int count = 0; 943 int streams = cs42l42->stream_use; 944 945 /* Count currently active streams */ 946 while (streams) { 947 if(streams & 1) 948 ++count; 949 streams >>= 1; 950 } 951 952 dev_dbg(component->dev, "%s() cs42l42->stream_use=%08x, active streams=%d\n", 953 __func__, cs42l42->stream_use, count); 954 955 regmap_read(cs42l42->regmap, CS42L42_PLL_LOCK_STATUS, &regval); 956 957 switch (cmd) { 958 case SNDRV_PCM_TRIGGER_START: 959 if (!regval) 960 snd_soc_component_update_bits(component, CS42L42_PLL_CTL1, 961 CS42L42_PLL_START_MASK, 1); 962 break; 963 964 case SNDRV_PCM_TRIGGER_STOP: 965 /* Last active stream, switching to SCO */ 966 if (count == 1) { 967 dev_dbg(component->dev, "%s() Switching to SCO\n", __func__); 968 969 regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_osc_seq, 970 ARRAY_SIZE(cs42l42_to_osc_seq)); 971 972 snd_soc_component_update_bits(component, CS42L42_MCLK_SRC_SEL, 973 CS42L42_MCLK_SRC_SEL_MASK | 974 CS42L42_MCLKDIV_MASK, 975 (0 << CS42L42_MCLK_SRC_SEL_SHIFT) | 976 (0 << CS42L42_MCLKDIV_SHIFT)); 977 978 ret = snd_soc_component_update_bits(component, CS42L42_PLL_CTL1, 979 CS42L42_PLL_START_MASK, 0); 980 981 /* PLL unlock delay 10ms*/ 982 usleep_range(10000,12000); 983 984 regmap_read(cs42l42->regmap, CS42L42_PLL_LOCK_STATUS, &regval); 985 } 986 break; 987 988 default: 989 break; 990 } 991 992 cs42l42->pll_lock = regval; 993 994 return 0; 995 } 996 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org