trace_printk usage in igc_main.c and stmmac_main.c cause kernel notice

[pfink-christ]

Hi, we are using yocto with meta-intel on master with linux-intel v6.12.16 and get the following notice when intel igc module is loaded:

[    5.182021] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    5.187270] **                                                      **
[    5.193870] ** trace_printk() being used. Allocating extra memory.  **
[    5.200139] **                                                      **
[    5.205388] ** This means that this is a DEBUG kernel and it is     **
[    5.210685] ** unsafe for production use.                           **
[    5.217280] **                                                      **
[    5.223921] ** If you see this message and you are not debugging    **
[    5.230512] ** the kernel, report this immediately to your vendor!  **
[    5.237139] **                                                      **
[    5.249163] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    5.260309] **********************************************************
[    5.276402] Intel(R) 2.5G Ethernet Linux Driver

Same on lts-v6.12.17-linux-250228T052357Z and 6.12/linux.

a4f7d08 is the origin of the problem. This commit was introduced 4 years ago as a temporary mechanism to log tx timestamps.

kernel.org does not have this commit and therefore does not print this message.

Who needs these timestamps? Or should it rather be removed from a lts kernel branch?

Thanks in advance
Peter

[pfink-christ]

I found another one in the stmmac driver, causing the same notice on atom x6000e CPUs: b2e0c1c ("net: stmmac: introduce AF_XDP ZC TX HW timestamps")