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| author | Thomas Richter <tmricht@linux.ibm.com> | 2023-10-18 11:53:52 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-10-25 15:08:29 +0200 |
| commit | aecd5a37b5ef4de4f6402dc079672e4243cc4c13 (patch) | |
| tree | 6f68ff3e3b5de97e33a7757afd5a052ec58d338f /arch/s390 | |
| parent | s390/pai: initialize event count once at initialization (diff) | |
| download | linux-aecd5a37b5ef4de4f6402dc079672e4243cc4c13.tar.xz linux-aecd5a37b5ef4de4f6402dc079672e4243cc4c13.zip | |
s390/pai_crypto: remove per-cpu variable assignement in event initialization
Function paicrypt_event_init() initializes the PMU device driver
specific details for an event. It is called once per event creation.
The function paicrypt_event_init() is not necessarily executed on
that CPU the event will be used for.
When an event is activated, function paicrypt_start() is used to
start the event on that CPU.
The per CPU data structure struct paicrypt_map has a pointer to
the event which is active for a particular CPU. This pointer is
set in function paicrypt_start() to point to the currently installed
event. There is no need to also set this pointer in function
paicrypt_event_init() where is might be assigned to the wrong CPU.
Therefore remove this assignment in paicrypt_event_init().
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/perf_pai_crypto.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c index 35940234da75..77fd24e6cbb6 100644 --- a/arch/s390/kernel/perf_pai_crypto.c +++ b/arch/s390/kernel/perf_pai_crypto.c @@ -285,7 +285,6 @@ static int paicrypt_event_init(struct perf_event *event) * are active at the same time. */ event->hw.last_tag = 0; - cpump->event = event; event->destroy = paicrypt_event_destroy; if (a->sample_period) { |