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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 5vFrhwGYnbZfxD7D02np5Yy8ZM4LXaDoIOLiO77KJasgvHZqybjSnDWLx7YHocnWPgAoWBdn3e8zsvrKihKM/v6gGSJhOnIdwBnM5lgxcwo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR10MB7193 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-17_05,2025-04-17_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 mlxlogscore=999 suspectscore=0 spamscore=0 bulkscore=0 malwarescore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502280000 definitions=main-2504170120 X-Proofpoint-GUID: vZcHKydI362mmNl6i5MGBhiGv4GcowSY X-Proofpoint-ORIG-GUID: vZcHKydI362mmNl6i5MGBhiGv4GcowSY On 4/17/25 1:00 PM, gaoxu wrote: [...] > diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c > index 447ac857e..9e60ff629 100644 > --- a/kernel/cgroup/cgroup.c > +++ b/kernel/cgroup/cgroup.c > @@ -90,7 +90,7 @@ > DEFINE_MUTEX(cgroup_mutex); > DEFINE_SPINLOCK(css_set_lock); > > -#ifdef CONFIG_PROVE_RCU > +#if (defined CONFIG_PROVE_RCU || defined CONFIG_LOCKDEP) > EXPORT_SYMBOL_GPL(cgroup_mutex); > EXPORT_SYMBOL_GPL(css_set_lock); > #endif It can be triggered when CONFIG_LOCK_STAT=y is enabled, which selects CONFIG_LOCKDEP=y and sets CONFIG_PROVE_RCU=n. The patch looks good to me. You may also want to update the description above DEFINE_MUTEX(cgroup_mutex); to reflect the modifications introduced by this patch. -- Cheers, Kamalesh