[alsa-devel] ASoC: Build error if CONFIG_I2C=m && CONFIG_SND_SOC=y

Hi, I got below build error if CONFIG_I2C=m && CONFIG_SND_SOC=y.

LD vmlinux sound/built-in.o: In function `snd_soc_codec_set_cache_io': last.c:(.text+0x2a0a8): undefined reference to `regmap_init_i2c' make: *** [vmlinux] Error 1

( I test the build on linux-next 20111206 )

Regards, Axel