diff options
Diffstat (limited to 'drivers/xen/cpu_hotplug.c')
| -rw-r--r-- | drivers/xen/cpu_hotplug.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/xen/cpu_hotplug.c b/drivers/xen/cpu_hotplug.c index 0003912a8111..b96b11e2b571 100644 --- a/drivers/xen/cpu_hotplug.c +++ b/drivers/xen/cpu_hotplug.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 #define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt #include <linux/notifier.h> @@ -18,15 +19,16 @@ static void enable_hotplug_cpu(int cpu) static void disable_hotplug_cpu(int cpu) { - if (cpu_online(cpu)) { - lock_device_hotplug(); + if (!cpu_is_hotpluggable(cpu)) + return; + lock_device_hotplug(); + if (cpu_online(cpu)) device_offline(get_cpu_device(cpu)); - unlock_device_hotplug(); - } - if (cpu_present(cpu)) + if (!cpu_online(cpu) && cpu_present(cpu)) { xen_arch_unregister_cpu(cpu); - - set_cpu_present(cpu, false); + set_cpu_present(cpu, false); + } + unlock_device_hotplug(); } static int vcpu_online(unsigned int cpu) @@ -52,7 +54,7 @@ static int vcpu_online(unsigned int cpu) } static void vcpu_hotplug(unsigned int cpu) { - if (!cpu_possible(cpu)) + if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) return; switch (vcpu_online(cpu)) { @@ -91,10 +93,8 @@ static int setup_cpu_watcher(struct notifier_block *notifier, (void)register_xenbus_watch(&cpu_watch); for_each_possible_cpu(cpu) { - if (vcpu_online(cpu) == 0) { - (void)cpu_down(cpu); - set_cpu_present(cpu, false); - } + if (vcpu_online(cpu) == 0) + disable_hotplug_cpu(cpu); } return NOTIFY_DONE; @@ -117,5 +117,5 @@ static int __init setup_vcpu_hotplug_event(void) return 0; } -arch_initcall(setup_vcpu_hotplug_event); +late_initcall(setup_vcpu_hotplug_event); |