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| author | Thomas Richter <tmricht@linux.ibm.com> | 2021-04-26 15:57:16 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-04-30 18:17:01 +0300 |
| commit | b0583ab47788617c6af484a844f13c57d7567c2a (patch) | |
| tree | 1a33bc8b1e90151607b3603ab0b6e100cfdf3565 | |
| parent | 1eefa4f4399b74dc7671c4e34c1b1c6244acff22 (diff) | |
| download | linux-b0583ab47788617c6af484a844f13c57d7567c2a.tar.xz | |
s390/cpumf: remove call to perf_event_update_userpage
The function cpumf_pmu_add and cpumf_pmu_del call function
perf_event_update_userpage(). This calls is obsolete, the calls add and
delete a counter event. Counter events do not sample data and the
event->rb member to access the sampling ring buffer is always NULL.
The function perf_event_update_userpage() simply returns in this case.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by : Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
| -rw-r--r-- | arch/s390/kernel/perf_cpum_cf.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c index 931e9d9b6524..31a605bcbc6e 100644 --- a/arch/s390/kernel/perf_cpum_cf.c +++ b/arch/s390/kernel/perf_cpum_cf.c @@ -428,8 +428,6 @@ static int cpumf_pmu_add(struct perf_event *event, int flags) if (flags & PERF_EF_START) cpumf_pmu_start(event, PERF_EF_RELOAD); - perf_event_update_userpage(event); - return 0; } @@ -449,8 +447,6 @@ static void cpumf_pmu_del(struct perf_event *event, int flags) */ if (!atomic_read(&cpuhw->ctr_set[event->hw.config_base])) ctr_set_disable(&cpuhw->state, event->hw.config_base); - - perf_event_update_userpage(event); } /* |