FYI, we noticed the following commit (built with gcc-6): commit: 7b20f325a566df27737c795176a9ae519ecc486d ("media: i2c: tw9910: Remove soc_camera dependencies") 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): [ 45.499066] Error: Driver 'tw9910' is already registered, aborting... [ 45.500549] Error: Driver 'ov772x' is already registered, aborting... 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