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Commit 7ffa51fe authored by Kyle Yan's avatar Kyle Yan Committed by Rishabh Bhatnagar
Browse files

Perf: arm64: Add additional CPUHP state for perf events 



Previous hotplug notifier was overwriting cpu online notifiers which
are needed by various drivers in the kernel. Instead create a new state
right after CPUHP_AP_NOTIFY_ONLINE just for perf.

Change-Id: Ie740315c621a176ceff3ca13f52a48716eef5782
[rananta@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: default avatarKyle Yan <kyan@codeaurora.org>
Signed-off-by: default avatarRaghavendra Rao Ananta <rananta@codeaurora.org>
parent 3d3eb5fb

arch/arm64/kernel/perf_event.c

+2 −2
Original line number Diff line number Diff line
@@ -1399,8 +1399,8 @@ static int perf_event_cpu_hp_init(void) 
{

	int ret;



	ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ONLINE,

				"PERF_EVENT/CPUHP_AP_PERF_ONLINE",

	ret = cpuhp_setup_state_nocalls(CPUHP_AP_NOTIFY_PERF_ONLINE,

				"PERF_EVENT/CPUHP_AP_NOTIFY_PERF_ONLINE",

				perf_event_hotplug_coming_up,

				perf_event_hotplug_going_down);

	if (ret)

include/linux/cpuhotplug.h

+1 −0
Original line number Diff line number Diff line
@@ -172,6 +172,7 @@ enum cpuhp_state { 
	CPUHP_AP_WATCHDOG_ONLINE,

	CPUHP_AP_WORKQUEUE_ONLINE,

	CPUHP_AP_RCUTREE_ONLINE,

	CPUHP_AP_NOTIFY_PERF_ONLINE,

	CPUHP_AP_ONLINE_DYN,

	CPUHP_AP_ONLINE_DYN_END		= CPUHP_AP_ONLINE_DYN + 30,

	CPUHP_AP_X86_HPET_ONLINE,