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/spinlock.h>
 6#include <linux/module.h>
 
 7
 8#include <asm/paravirt.h>
 9
10static inline void
11default_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags)
12{
13	arch_spin_lock(lock);
14}
15
16struct pv_lock_ops pv_lock_ops = {
17#ifdef CONFIG_SMP
18	.spin_is_locked = __ticket_spin_is_locked,
19	.spin_is_contended = __ticket_spin_is_contended,
20
21	.spin_lock = __ticket_spin_lock,
22	.spin_lock_flags = default_spin_lock_flags,
23	.spin_trylock = __ticket_spin_trylock,
24	.spin_unlock = __ticket_spin_unlock,
 
25#endif
 
 
 
 
 
 
 
 
 
 
 
 
 
26};
27EXPORT_SYMBOL(pv_lock_ops);
28

 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/spinlock.h>
 6#include <linux/module.h>
 7#include <linux/jump_label.h>
 8
 9#include <asm/paravirt.h>
10
11#ifdef CONFIG_QUEUED_SPINLOCKS
12__visible void __native_queued_spin_unlock(struct qspinlock *lock)
13{
14	native_queued_spin_unlock(lock);
15}
16
17PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
 
 
 
18
19bool pv_is_native_spin_unlock(void)
20{
21	return pv_lock_ops.queued_spin_unlock.func ==
22		__raw_callee_save___native_queued_spin_unlock;
23}
24#endif
25
26struct pv_lock_ops pv_lock_ops = {
27#ifdef CONFIG_SMP
28#ifdef CONFIG_QUEUED_SPINLOCKS
29	.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
30	.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
31	.wait = paravirt_nop,
32	.kick = paravirt_nop,
33#else /* !CONFIG_QUEUED_SPINLOCKS */
34	.lock_spinning = __PV_IS_CALLEE_SAVE(paravirt_nop),
35	.unlock_kick = paravirt_nop,
36#endif /* !CONFIG_QUEUED_SPINLOCKS */
37#endif /* SMP */
38};
39EXPORT_SYMBOL(pv_lock_ops);
40
41struct static_key paravirt_ticketlocks_enabled = STATIC_KEY_INIT_FALSE;
42EXPORT_SYMBOL(paravirt_ticketlocks_enabled);