Re: [PATCH] ptp_qoriq: fix overflow in ptp_qoriq_adjfine() u64 calcalation

From: Guenter Roeck <linux@roeck-us.net>
Date: Thu, 25 Mar 2021 03:23:07 -0700

mul_u64_u64_div_u64() is not exported. As result, every build with
CONFIG_PTP_1588_CLOCK_QORIQ=m (ie every allmodconfig build) fails with:

ERROR: modpost: "mul_u64_u64_div_u64" [drivers/ptp/ptp-qoriq.ko] undefined!

or a similar error.

I fixed this with a follow-up commit to export the symbol.