Greeting,

FYI, we noticed WARNING:at_fs/sysfs/group.c:#sysfs_remove_group due to commit (built with gcc-11):

commit: 19c2a61fbefdd9fc68a6791dad0a7dff9b7579c7 ("sysfs: do not create empty directories if no attributes are present")
https://git.kernel.org/cgit/linux/kernel/git/gregkh/driver-core.git debugfs_cleanup

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):


[    2.191285][    T1] ------------[ cut here ]------------
[    2.192135][    T1] sysfs group 'power' not found for kobject 'platform'
[ 2.193159][ T1] WARNING: CPU: 0 PID: 1 at fs/sysfs/group.c:291 sysfs_remove_group (fs/sysfs/group.c:291) 
[    2.194622][    T1] Modules linked in:
[    2.195136][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc1-00037-g19c2a61fbefd #1
[    2.196625][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 2.197668][ T1] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:291) 
[ 2.198466][ T1] Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 3e 48 8b 33 48 c7 c7 40 3f d9 83 e8 6c 34 9f 01 <0f> 0b 48 83 c4 08 5b 5d 41 5c c3 e8 09 21 d6 ff e9 26 ff ff ff 48
All code
========
   0:	48 89 d9             	mov    %rbx,%rcx
   3:	49 8b 14 24          	mov    (%r12),%rdx
   7:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   e:	fc ff df 
  11:	48 c1 e9 03          	shr    $0x3,%rcx
  15:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  19:	75 3e                	jne    0x59
  1b:	48 8b 33             	mov    (%rbx),%rsi
  1e:	48 c7 c7 40 3f d9 83 	mov    $0xffffffff83d93f40,%rdi
  25:	e8 6c 34 9f 01       	callq  0x19f3496
  2a:*	0f 0b                	ud2    		<-- trapping instruction
  2c:	48 83 c4 08          	add    $0x8,%rsp
  30:	5b                   	pop    %rbx
  31:	5d                   	pop    %rbp
  32:	41 5c                	pop    %r12
  34:	c3                   	retq   
  35:	e8 09 21 d6 ff       	callq  0xffffffffffd62143
  3a:	e9 26 ff ff ff       	jmpq   0xffffffffffffff65
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2    
   2:	48 83 c4 08          	add    $0x8,%rsp
   6:	5b                   	pop    %rbx
   7:	5d                   	pop    %rbp
   8:	41 5c                	pop    %r12
   a:	c3                   	retq   
   b:	e8 09 21 d6 ff       	callq  0xffffffffffd62119
  10:	e9 26 ff ff ff       	jmpq   0xffffffffffffff3b
  15:	48                   	rex.W
[    2.200028][    T1] RSP: 0000:ffffc9000001fd00 EFLAGS: 00010282
[    2.200463][    T1] RAX: 0000000000000000 RBX: ffffffff83f02f20 RCX: 0000000000000000
[    2.201570][    T1] RDX: 0000000000000000 RSI: 1ffff92000003f69 RDI: fffff52000003f92
[    2.202610][    T1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc9000001fa37
[    2.203576][    T1] R10: fffff52000003f46 R11: 0000000000000001 R12: ffffffff853cdca0
[    2.204604][    T1] R13: ffffffff853cdd7c R14: ffffffff853cdce8 R15: ffffffff853cdca0
[    2.205579][    T1] FS:  0000000000000000(0000) GS:ffff88839d600000(0000) knlGS:0000000000000000
[    2.206625][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.207443][    T1] CR2: ffff88843ffff000 CR3: 0000000004a14000 CR4: 00000000000406f0
[    2.208603][    T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    2.209617][    T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    2.210613][    T1] Call Trace:
[    2.211137][    T1]  <TASK>
[ 2.211740][ T1] dpm_sysfs_add (drivers/base/power/sysfs.c:736) 
[ 2.212422][ T1] device_add (drivers/base/core.c:3391) 
[ 2.213137][ T1] ? memset (mm/kasan/shadow.c:44) 
[ 2.213897][ T1] ? __fw_devlink_link_to_suppliers (drivers/base/core.c:3316) 
[ 2.214437][ T1] ? pm_runtime_init (drivers/base/power/runtime.c:1724) 
[ 2.215137][ T1] platform_bus_init (drivers/base/platform.c:1518) 
[ 2.216009][ T1] driver_init (drivers/base/init.c:37) 
[ 2.216430][ T1] kernel_init_freeable (init/main.c:1409 init/main.c:1631) 
[ 2.217138][ T1] ? console_on_rootfs (init/main.c:1601) 
[ 2.218094][ T1] ? usleep_range_state (kernel/time/timer.c:1897) 
[ 2.218446][ T1] ? _raw_spin_lock_bh (kernel/locking/spinlock.c:169) 
[ 2.219150][ T1] ? rest_init (init/main.c:1511) 
[ 2.220013][ T1] ? rest_init (init/main.c:1511) 
[ 2.220411][ T1] kernel_init (init/main.c:1521) 
[ 2.221138][ T1] ret_from_fork (arch/x86/entry/entry_64.S:312) 
[    2.221999][    T1]  </TASK>
[    2.222379][    T1] ---[ end trace 0000000000000000 ]---


If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@intel.com>
| Link: https://lore.kernel.org/oe-lkp/202211181055.5bb2b139-yujie.liu@intel.com


To reproduce:

        # build kernel
	cd linux
	cp config-6.1.0-rc1-00037-g19c2a61fbefd .config
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	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 <bzImage> -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