diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt_rdtgroup.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c index 8ce5d038c43b..64c5ff97ee0d 100644 --- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c +++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c @@ -1149,6 +1149,7 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type, struct dentry *dentry; int ret; + cpus_read_lock(); mutex_lock(&rdtgroup_mutex); /* * resctrl file system can only be mounted once. @@ -1198,12 +1199,12 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type, goto out_mondata; if (rdt_alloc_capable) - static_branch_enable(&rdt_alloc_enable_key); + static_branch_enable_cpuslocked(&rdt_alloc_enable_key); if (rdt_mon_capable) - static_branch_enable(&rdt_mon_enable_key); + static_branch_enable_cpuslocked(&rdt_mon_enable_key); if (rdt_alloc_capable || rdt_mon_capable) - static_branch_enable(&rdt_enable_key); + static_branch_enable_cpuslocked(&rdt_enable_key); if (is_mbm_enabled()) { r = &rdt_resources_all[RDT_RESOURCE_L3]; @@ -1226,6 +1227,7 @@ out_cdp: out: rdt_last_cmd_clear(); mutex_unlock(&rdtgroup_mutex); + cpus_read_unlock(); return dentry; } |