ERROR: "mcu_get_data" [drivers/media/i2c/ad478.ko] undefined!

dear Sir,

my ad478.c declare this

extern int mcu_get_data(int val);

and build it then shows

ERROR: “mcu_get_data” [drivers/media/i2c/ad478.ko] undefined!

how do i change ERROR as WARNING to finish building ko

thanks a lot

Why need mcu_get_data()
Check if it’s necessary to remove it to try.

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