s390/perf: Remove driver-specific throttle support

The throttle support has been added in the generic code. Remove
the driver-specific throttle support.

Besides the throttle, perf_event_overflow may return true because of
event_limit. It already does an inatomic event disable. The pmu->stop
is not required either.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20250520181644.2673067-8-kan.liang@linux.intel.com

diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index e657fad7e376f5f7afbb9cb43491d7ad2f1f6406..6a262e198e35ec3dc9572a4d54ebb3b30891e175 100644 (file)
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -980,8 +980,6 @@ static int cfdiag_push_sample(struct perf_event *event,
        }
 
        overflow = perf_event_overflow(event, &data, &regs);
-       if (overflow)
-               event->pmu->stop(event, 0);
 
        perf_event_update_userpage(event);
        return overflow;

diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index ad22799d8a7d9198d622530a4458651800c9b4f6..91469401f2c97106353e2be9615da19611d4a827 100644 (file)
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1072,10 +1072,7 @@ static int perf_push_sample(struct perf_event *event,
        overflow = 0;
        if (perf_event_exclude(event, &regs, sde_regs))
                goto out;
-       if (perf_event_overflow(event, &data, &regs)) {
-               overflow = 1;
-               event->pmu->stop(event, 0);
-       }
+       overflow = perf_event_overflow(event, &data, &regs);
        perf_event_update_userpage(event);
 out:
        return overflow;