Thanks for noticing the missing crc16 module selection, it's indeed 
needed if it's not for some other reason selected in the .config.

Mika

quoted text
> From: Randy Dunlap <randy.dunlap@oracle.com>
> 
> Fix w1_ds2423 build:  needs to select CRC16.
> 
> w1_ds2423.c:(.text+0x9971d): undefined reference to `crc16'
> w1_ds2423.c:(.text+0x9973a): undefined reference to `crc16'
> 
> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
> Cc: Mika Laitio <lamikr@pilppa.org>
> ---
>  drivers/w1/slaves/Kconfig |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- mmotm-2010-1117-1703.orig/drivers/w1/slaves/Kconfig
> +++ mmotm-2010-1117-1703/drivers/w1/slaves/Kconfig
> @@ -18,6 +18,7 @@ config W1_SLAVE_SMEM
>  
>  config W1_SLAVE_DS2423
>  	tristate "Counter 1-wire device (DS2423)"
> +	select CRC16
>  	help
>  	  If you enable this you can read the counter values available
>  	  in the DS2423 chipset from the w1_slave file under the
> 

-- 
Terveisin Mika
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