tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git topic/wm9081 head: 48c3387642967d62fc47aff4ad0e3816bf8292e3 commit: 48c3387642967d62fc47aff4ad0e3816bf8292e3 [1/1] ASoC: wm9081: replace codec to component config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 48c3387642967d62fc47aff4ad0e3816bf8292e3 # save the attached .config to linux build tree make.cross ARCH=arm
Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
sound/soc/codecs/wm9081.c: In function 'wm9081_digital_mute':
sound/soc/codecs/wm9081.c:1161:7: warning: 'reg' may be used uninitialized in this function [-Wmaybe-uninitialized]
reg |= WM9081_DAC_MUTE;
vim +/reg +1161 sound/soc/codecs/wm9081.c
86ed3669 Mark Brown 2009-05-22 1152 86ed3669 Mark Brown 2009-05-22 1153 static int wm9081_digital_mute(struct snd_soc_dai *codec_dai, int mute) 86ed3669 Mark Brown 2009-05-22 1154 { 48c33876 Kuninori Morimoto 2018-01-29 1155 struct snd_soc_component *component = codec_dai->component; 86ed3669 Mark Brown 2009-05-22 1156 unsigned int reg; 86ed3669 Mark Brown 2009-05-22 1157 48c33876 Kuninori Morimoto 2018-01-29 1158 snd_soc_component_read32(component, WM9081_DAC_DIGITAL_2); 86ed3669 Mark Brown 2009-05-22 1159 86ed3669 Mark Brown 2009-05-22 1160 if (mute) 86ed3669 Mark Brown 2009-05-22 @1161 reg |= WM9081_DAC_MUTE; 86ed3669 Mark Brown 2009-05-22 1162 else 86ed3669 Mark Brown 2009-05-22 1163 reg &= ~WM9081_DAC_MUTE; 86ed3669 Mark Brown 2009-05-22 1164 48c33876 Kuninori Morimoto 2018-01-29 1165 snd_soc_component_write(component, WM9081_DAC_DIGITAL_2, reg); 86ed3669 Mark Brown 2009-05-22 1166 86ed3669 Mark Brown 2009-05-22 1167 return 0; 86ed3669 Mark Brown 2009-05-22 1168 } 86ed3669 Mark Brown 2009-05-22 1169
:::::: The code at line 1161 was first introduced by commit :::::: 86ed3669f068b514ab85ffd548456a342b3fb8d3 ASoC: WM9081 mono DAC with integrated 2.6W class AB/D amplifier driver
:::::: TO: Mark Brown broonie@opensource.wolfsonmicro.com :::::: CC: Mark Brown broonie@opensource.wolfsonmicro.com
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