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We may disable proc fs only for sound part, to reduce ALSA memory footprint. So add CONFIG_SND_PROC_FS and replace the old CONFIG_PROC_FSs in alsa code. With sound proc fs disabled, we can save about 9KB memory size on X86_64 platform. Signed-off-by: Jie Yang <[email protected]> Reviewed-by: Mark Brown <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>