diff options
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 4c5c8d731fbb..cab678ed6618 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -1214,6 +1214,14 @@ static struct ctl_table armv8_pmu_sysctl_table[] = { { } }; +static void armv8_pmu_register_sysctl_table(void) +{ + static u32 tbl_registered = 0; + + if (!cmpxchg_relaxed(&tbl_registered, 0, 1)) + register_sysctl("kernel", armv8_pmu_sysctl_table); +} + static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name, int (*map_event)(struct perf_event *event), const struct attribute_group *events, @@ -1248,8 +1256,7 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name, cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_CAPS] = caps ? caps : &armv8_pmuv3_caps_attr_group; - register_sysctl("kernel", armv8_pmu_sysctl_table); - + armv8_pmu_register_sysctl_table(); return 0; } |