Commit aecd5a37 authored Oct 18, 2023 by Thomas Richter Committed by Vasily Gorbik Oct 25, 2023

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>

parent b286997e

arch/s390/kernel/perf_pai_crypto.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -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) {