diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/ftrace.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/nmi.c | 8 | ||||
| -rw-r--r-- | arch/s390/kernel/perf_cpum_sf.c | 6 |
3 files changed, 4 insertions, 12 deletions
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c index 708c772b086d..b86bb8823f15 100644 --- a/arch/s390/kernel/ftrace.c +++ b/arch/s390/kernel/ftrace.c @@ -156,6 +156,8 @@ unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip) { struct ftrace_graph_ent trace; + if (unlikely(ftrace_graph_is_dead())) + goto out; if (unlikely(atomic_read(¤t->tracing_graph_pause))) goto out; ip = (ip & PSW_ADDR_INSN) - MCOUNT_INSN_SIZE; diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c index dd1c24ceda50..3f51cf4e8f02 100644 --- a/arch/s390/kernel/nmi.c +++ b/arch/s390/kernel/nmi.c @@ -54,12 +54,8 @@ void s390_handle_mcck(void) */ local_irq_save(flags); local_mcck_disable(); - /* - * Ummm... Does this make sense at all? Copying the percpu struct - * and then zapping it one statement later? - */ - memcpy(&mcck, this_cpu_ptr(&cpu_mcck), sizeof(mcck)); - memset(&mcck, 0, sizeof(struct mcck_struct)); + mcck = *this_cpu_ptr(&cpu_mcck); + memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck)); clear_cpu_flag(CIF_MCCK_PENDING); local_mcck_enable(); local_irq_restore(flags); diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c index 8e1b77530060..c3f8d157cb0d 100644 --- a/arch/s390/kernel/perf_cpum_sf.c +++ b/arch/s390/kernel/perf_cpum_sf.c @@ -1410,11 +1410,6 @@ static void cpumsf_pmu_del(struct perf_event *event, int flags) perf_pmu_enable(event->pmu); } -static int cpumsf_pmu_event_idx(struct perf_event *event) -{ - return event->hw.idx; -} - CPUMF_EVENT_ATTR(SF, SF_CYCLES_BASIC, PERF_EVENT_CPUM_SF); CPUMF_EVENT_ATTR(SF, SF_CYCLES_BASIC_DIAG, PERF_EVENT_CPUM_SF_DIAG); @@ -1457,7 +1452,6 @@ static struct pmu cpumf_sampling = { .stop = cpumsf_pmu_stop, .read = cpumsf_pmu_read, - .event_idx = cpumsf_pmu_event_idx, .attr_groups = cpumsf_pmu_attr_groups, }; |