spinlock.c (dca3a783400a18e2bf4503b1d4a85c4d0ca1a7e4) spinlock.c (cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159)
1/*
2 * Split spinlock implementation out into its own file, so it can be
3 * compiled in a FTRACE-compatible way.
4 */
5#include <linux/kernel_stat.h>
6#include <linux/spinlock.h>
7#include <linux/debugfs.h>
8#include <linux/log2.h>

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359 return IRQ_HANDLED;
360}
361
362void __cpuinit xen_init_lock_cpu(int cpu)
363{
364 int irq;
365 const char *name;
366
1/*
2 * Split spinlock implementation out into its own file, so it can be
3 * compiled in a FTRACE-compatible way.
4 */
5#include <linux/kernel_stat.h>
6#include <linux/spinlock.h>
7#include <linux/debugfs.h>
8#include <linux/log2.h>

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359 return IRQ_HANDLED;
360}
361
362void __cpuinit xen_init_lock_cpu(int cpu)
363{
364 int irq;
365 const char *name;
366
367 WARN(per_cpu(lock_kicker_irq, cpu) > 0, "spinlock on CPU%d exists on IRQ%d!\n",
368 cpu, per_cpu(lock_kicker_irq, cpu));
369
367 name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
368 irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
369 cpu,
370 dummy_handler,
371 IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
372 name,
373 NULL);
374
375 if (irq >= 0) {
376 disable_irq(irq); /* make sure it's never delivered */
377 per_cpu(lock_kicker_irq, cpu) = irq;
378 }
379
380 printk("cpu %d spinlock event irq %d\n", cpu, irq);
381}
382
383void xen_uninit_lock_cpu(int cpu)
384{
385 unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
370 name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
371 irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
372 cpu,
373 dummy_handler,
374 IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
375 name,
376 NULL);
377
378 if (irq >= 0) {
379 disable_irq(irq); /* make sure it's never delivered */
380 per_cpu(lock_kicker_irq, cpu) = irq;
381 }
382
383 printk("cpu %d spinlock event irq %d\n", cpu, irq);
384}
385
386void xen_uninit_lock_cpu(int cpu)
387{
388 unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
389 per_cpu(lock_kicker_irq, cpu) = -1;
386}
387
388void __init xen_init_spinlocks(void)
389{
390 BUILD_BUG_ON(sizeof(struct xen_spinlock) > sizeof(arch_spinlock_t));
391
392 pv_lock_ops.spin_is_locked = xen_spin_is_locked;
393 pv_lock_ops.spin_is_contended = xen_spin_is_contended;

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391
392void __init xen_init_spinlocks(void)
393{
394 BUILD_BUG_ON(sizeof(struct xen_spinlock) > sizeof(arch_spinlock_t));
395
396 pv_lock_ops.spin_is_locked = xen_spin_is_locked;
397 pv_lock_ops.spin_is_contended = xen_spin_is_contended;

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