On Sat, Jun 06, 2020 at 02:20:36PM -0500, Eric W. Biederman wrote: > @@ -39,7 +37,6 @@ static kernel_cap_t usermodehelper_inheritable = CAP_FULL_SET; > static DEFINE_SPINLOCK(umh_sysctl_lock); > static DECLARE_RWSEM(umhelper_sem); > static LIST_HEAD(umh_list); > -static DEFINE_MUTEX(umh_list_lock); You can delete the umh_list too; you've deleted all its users.