Extern or forward variable declaration at include/sound/soc.h, line 399 References: include/sound/soc.h, line 399 include/sound/soc.h, line 753 include/sound/soc.h, line 1035 sound/soc/intel/boards/bytcht_es8316.c, line 125 sound/soc/intel/boards/bytcr_rt5640.c, line 579 sound/soc/intel/boards/bytcr_rt5651.c, line 157 sound/soc/samsung/bells.c, line 234 sound/soc/samsung/bells.c, line 242 sound/soc/samsung/littlemill.c, line 142 sound/soc/samsung/lowland.c, line 82 sound/soc/samsung/speyside.c, line 189 sound/soc/soc-core.c, line 3609 sound/soc/soc-dapm.c, line 3621 sound/soc/soc-dapm.c, line 3782 sound/soc/soc-dapm.c, line 3801 sound/soc/soc-pcm.c, line 44 sound/soc/soc-pcm.c, line 379 sound/soc/soc-pcm.c, line 380 sound/soc/soc-pcm.c, line 1574 sound/soc/soc-pcm.c, line 1606 sound/soc/soc-topology.c, line 1673 sound/soc/soc-topology.c, line 1708 sound/soc/soc-topology.c, line 2178 sound/soc/sti/sti_uniperif.c, line 387 sound/soc/stm/stm32_i2s.c, line 735