FYI, we noticed the following commit (built with gcc-7):

commit: e6a1b7e88046055989b8b59c1d648fda4e606f34 ("ALSA: portman2x4 - use new parport device model")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu Nehalem -smp 2 -m 512M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


[    4.394883] parport0: cannot grant exclusive access for device portman



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Xiaolong