diff options
Diffstat (limited to 'arch/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 34ed6edf85d0..b81c88e51daa 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -17,6 +17,7 @@ #include <linux/slab.h> #include <linux/smp.h> #include <linux/irq_work.h> +#include <linux/tick.h> #include <asm/paravirt.h> #include <asm/desc.h> @@ -64,7 +65,7 @@ static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static void __cpuinit cpu_bringup(void) +static void cpu_bringup(void) { int cpu; @@ -96,7 +97,7 @@ static void __cpuinit cpu_bringup(void) wmb(); /* make sure everything is out */ } -static void __cpuinit cpu_bringup_and_idle(void) +static void cpu_bringup_and_idle(void) { cpu_bringup(); cpu_startup_entry(CPUHP_ONLINE); @@ -325,7 +326,7 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus) set_cpu_present(cpu, true); } -static int __cpuinit +static int cpu_initialize_context(unsigned int cpu, struct task_struct *idle) { struct vcpu_guest_context *ctxt; @@ -396,7 +397,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) return 0; } -static int __cpuinit xen_cpu_up(unsigned int cpu, struct task_struct *idle) +static int xen_cpu_up(unsigned int cpu, struct task_struct *idle) { int rc; @@ -469,11 +470,18 @@ static void xen_cpu_die(unsigned int cpu) xen_teardown_timer(cpu); } -static void __cpuinit xen_play_dead(void) /* used only with HOTPLUG_CPU */ +static void xen_play_dead(void) /* used only with HOTPLUG_CPU */ { play_dead_common(); HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL); cpu_bringup(); + /* + * commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down) + * clears certain data that the cpu_idle loop (which called us + * and that we return from) expects. The only way to get that + * data back is to call: + */ + tick_nohz_idle_enter(); } #else /* !CONFIG_HOTPLUG_CPU */ @@ -683,7 +691,7 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) xen_init_lock_cpu(0); } -static int __cpuinit xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle) +static int xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle) { int rc; /* |