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Commit cb60d114 authored by Ian Campbell's avatar Ian Campbell Committed by Konrad Rzeszutek Wilk
Browse files

xen: events: use per-cpu variable for cpu_evtchn_mask 



I can't see any reason why it isn't already.

Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent f4d0635b

drivers/xen/events.c

+8 −20
Original line number Diff line number Diff line
@@ -107,19 +107,9 @@ static struct irq_info *irq_info; 
static int *pirq_to_irq;



static int *evtchn_to_irq;

struct cpu_evtchn_s {

	unsigned long bits[NR_EVENT_CHANNELS/BITS_PER_LONG];

};



static __initdata struct cpu_evtchn_s init_evtchn_mask = {

	.bits[0 ... (NR_EVENT_CHANNELS/BITS_PER_LONG)-1] = ~0ul,

};

static struct cpu_evtchn_s *cpu_evtchn_mask_p = &init_evtchn_mask;



static inline unsigned long *cpu_evtchn_mask(int cpu)

{

	return cpu_evtchn_mask_p[cpu].bits;

}

static DEFINE_PER_CPU(unsigned long [NR_EVENT_CHANNELS/BITS_PER_LONG],

		      cpu_evtchn_mask);



/* Xen will never allocate port zero for any purpose. */

#define VALID_EVTCHN(chn)	((chn) != 0)
@@ -257,7 +247,7 @@ static inline unsigned long active_evtchns(unsigned int cpu, 
					   unsigned int idx)

{

	return (sh->evtchn_pending[idx] &

		cpu_evtchn_mask(cpu)[idx] &

		per_cpu(cpu_evtchn_mask, cpu)[idx] &

		~sh->evtchn_mask[idx]);

}
@@ -270,8 +260,8 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu) 
	cpumask_copy(irq_to_desc(irq)->irq_data.affinity, cpumask_of(cpu));

#endif



	clear_bit(chn, cpu_evtchn_mask(cpu_from_irq(irq)));

	set_bit(chn, cpu_evtchn_mask(cpu));

	clear_bit(chn, per_cpu(cpu_evtchn_mask, cpu_from_irq(irq)));

	set_bit(chn, per_cpu(cpu_evtchn_mask, cpu));



	irq_info[irq].cpu = cpu;

}
@@ -289,8 +279,8 @@ static void init_evtchn_cpu_bindings(void) 
#endif



	for_each_possible_cpu(i)

		memset(cpu_evtchn_mask(i),

		       (i == 0) ? ~0 : 0, sizeof(struct cpu_evtchn_s));

		memset(per_cpu(cpu_evtchn_mask, i),

		       (i == 0) ? ~0 : 0, sizeof(*per_cpu(cpu_evtchn_mask, i)));



}
@@ -925,7 +915,7 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id) 
{

	struct shared_info *sh = HYPERVISOR_shared_info;

	int cpu = smp_processor_id();

	unsigned long *cpu_evtchn = cpu_evtchn_mask(cpu);

	unsigned long *cpu_evtchn = per_cpu(cpu_evtchn_mask, cpu);

	int i;

	unsigned long flags;

	static DEFINE_SPINLOCK(debug_lock);
@@ -1462,8 +1452,6 @@ void __init xen_init_IRQ(void) 
{

	int i;



	cpu_evtchn_mask_p = kcalloc(nr_cpu_ids, sizeof(struct cpu_evtchn_s),

				    GFP_KERNEL);

	irq_info = kcalloc(nr_irqs, sizeof(*irq_info), GFP_KERNEL);



	/* We are using nr_irqs as the maximum number of pirq available but