Greeting, FYI, we noticed the following commit (built with clang-14): commit: 0f3352c867eec058542e57fb7a0cda5829a00d36 ("serial: 8250: implement write_atomic") https://git.kernel.org/cgit/linux/kernel/git/rt/linux-rt-devel.git linux-6.0.y-rt in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): [ 2.505585][ T1] ------------[ cut here ]------------ [ 2.505589][ T1] raw_local_irq_restore() called with IRQs enabled [ 2.505601][ T1] WARNING: CPU: 1 PID: 1 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x22/0x30 [ 2.505630][ T1] Modules linked in: [ 2.505638][ T1] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 6.0.0-rc1-00018-g0f3352c867ee #1 [ 2.505645][ T1] EIP: warn_bogus_irq_restore+0x22/0x30 [ 2.505652][ T1] Code: cc cc cc cc cc cc cc cc 55 89 e5 80 3d 9b 00 86 c2 00 74 02 5d c3 c6 05 9b 00 86 c2 01 68 0a c7 4b c2 e8 31 55 2f ff 83 c4 04 <0f> 0b 5d c3 cc cc cc cc cc cc cc cc cc cc 55 89 e5 57 56 50 64 8b [ 2.505657][ T1] EAX: 00000030 EBX: 00000100 ECX: 00000027 EDX: ec62fce8 [ 2.505661][ T1] ESI: c372fde4 EDI: 00000004 EBP: c389fd28 ESP: c389fd28 [ 2.505664][ T1] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010286 [ 2.505669][ T1] CR0: 80050033 CR2: bfac9f1c CR3: 02f2c000 CR4: 000406d0 [ 2.505676][ T1] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 2.505679][ T1] DR6: fffe0ff0 DR7: 00000400 [ 2.505682][ T1] Call Trace: [ 2.505686][ T1] serial8250_config_port+0x8cb/0x9a0 [ 2.505696][ T1] uart_add_one_port+0x1fe/0x5f0 [ 2.505706][ T1] serial8250_register_ports+0x7d/0xa3 [ 2.505714][ T1] serial8250_init+0xae/0xd4 [ 2.505718][ T1] __initstub__kmod_8250__224_1263_serial8250_init6+0x8/0xa [ 2.505723][ T1] do_one_initcall+0x156/0x390 [ 2.505732][ T1] ? serial8250_isa_init_ports+0x18b/0x18b [ 2.505737][ T1] do_initcall_level+0x6a/0x7c [ 2.505748][ T1] ? rest_init+0x160/0x160 [ 2.505753][ T1] do_initcalls+0x3c/0x5d [ 2.505757][ T1] do_basic_setup+0x12/0x14 [ 2.505761][ T1] kernel_init_freeable+0x7a/0xb2 [ 2.505766][ T1] kernel_init+0x12/0x170 [ 2.505772][ T1] ret_from_fork+0x19/0x30 [ 2.505776][ T1] irq event stamp: 205287 [ 2.505778][ T1] hardirqs last enabled at (205293): [] console_trylock_spinning+0x172/0x1e0 [ 2.505787][ T1] hardirqs last disabled at (205298): [] console_trylock_spinning+0x6e/0x1e0 [ 2.505792][ T1] softirqs last enabled at (204360): [] do_softirq_own_stack+0x1d/0x30 [ 2.505803][ T1] softirqs last disabled at (204355): [] do_softirq_own_stack+0x1d/0x30 [ 2.505808][ T1] ---[ end trace 0000000000000000 ]--- ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/sleep: vm-snb/boot/openwrt-i386-generic-20190428.cgz/i386-randconfig-a002-20220822/clang-14/1 commit: e3c8f28432e291 ("printk: add infrastucture for atomic consoles") 0f3352c867eec0 ("serial: 8250: implement write_atomic") e3c8f28432e291b0 0f3352c867eec058542e57fb7a0 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :20 100% 20:20 dmesg.EIP:warn_bogus_irq_restore :20 100% 20:20 dmesg.WARNING:at_kernel/locking/irqflag-debug.c:#warn_bogus_irq_restore If you fix the issue, kindly add following tag Reported-by: kernel test robot To reproduce: # build kernel cd linux cp config-6.0.0-rc1-00018-g0f3352c867ee .config make HOSTCC=clang-14 CC=clang-14 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=clang-14 CC=clang-14 ARCH=i386 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://01.org/lkp