toolchain: GCC 11.1.0
config: defconfig + kcsan.config
==================================================================
BUG: KCSAN: data-race in __d_add / __d_add

write (marked) to 0xffff1236d8980b78 of 4 bytes by task 1925 on cpu 46:
 __d_add+0x274/0x2d0
 d_add+0x38/0x50
 simple_lookup+0x68/0x94
 path_openat+0x780/0x1590
 do_filp_open+0xf8/0x1e0
 do_sys_openat2+0xbc/0x220
 __arm64_sys_openat+0xa0/0xf0
 invoke_syscall+0x60/0x180
 el0_svc_common.constprop.0+0x128/0x160
 do_el0_svc+0x8c/0xb0
 el0_svc+0x3c/0x80
 el0t_64_sync_handler+0xa8/0x130
 el0t_64_sync+0x1a0/0x1a4

read to 0xffff1236d8980b78 of 4 bytes by task 1889 on cpu 27:
 __d_add+0x258/0x2d0
 d_add+0x38/0x50
 simple_lookup+0x68/0x94
 path_openat+0x780/0x1590
 do_filp_open+0xf8/0x1e0
 do_sys_openat2+0xbc/0x220
 __arm64_sys_openat+0xa0/0xf0
 invoke_syscall+0x60/0x180
 el0_svc_common.constprop.0+0x128/0x160
 do_el0_svc+0x8c/0xb0
 el0_svc+0x3c/0x80
 el0t_64_sync_handler+0xa8/0x130
 el0t_64_sync+0x1a0/0x1a4

value changed: 0x00000996 -> 0x00000998
  
Reported by Kernel Concurrency Sanitizer on:
CPU: 27 PID: 1889 Comm: systemd-udevd Not tainted 5.16.0-rc4-00002-g58b9ffdc5dc3 #1
Hardware name: linux,dummy-virt (DT)
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