6.6-stable review patch. If anyone has any objections, please let me know.
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From: Bibo Mao maobibo@loongson.cn
[ Upstream commit f3334ebb8a2a1841c2824594dd992e66de19deb2 ]
There is an smp function call named reset_counters() to init PMU registers of every CPU in PMU initialization state. It requires that all CPUs are online. However there is an early_initcall() wrapper for the PMU init funciton init_hw_perf_events(), so that pmu init funciton is called in do_pre_smp_initcalls() which before function smp_init(). Function reset_counters() cannot work on other CPUs since they haven't boot up still.
Here replace the wrapper early_initcall() with pure_initcall(), so that the PMU init function is called after every cpu is online.
Signed-off-by: Bibo Mao maobibo@loongson.cn Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Sasha Levin sashal@kernel.org --- arch/loongarch/kernel/perf_event.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/kernel/perf_event.c b/arch/loongarch/kernel/perf_event.c index 0491bf453cd49..cac7cba81b65f 100644 --- a/arch/loongarch/kernel/perf_event.c +++ b/arch/loongarch/kernel/perf_event.c @@ -884,4 +884,4 @@ static int __init init_hw_perf_events(void)
return 0; } -early_initcall(init_hw_perf_events); +pure_initcall(init_hw_perf_events);