| #ifndef _ASM_X86_QSPINLOCK_H |
| #define _ASM_X86_QSPINLOCK_H |
| |
| #include <asm/cpufeature.h> |
| #include <asm-generic/qspinlock_types.h> |
| |
| #define queued_spin_unlock queued_spin_unlock |
| /** |
| * queued_spin_unlock - release a queued spinlock |
| * @lock : Pointer to queued spinlock structure |
| * |
| * A smp_store_release() on the least-significant byte. |
| */ |
| static inline void queued_spin_unlock(struct qspinlock *lock) |
| { |
| smp_store_release((u8 *)lock, 0); |
| } |
| |
| #define virt_queued_spin_lock virt_queued_spin_lock |
| |
| static inline bool virt_queued_spin_lock(struct qspinlock *lock) |
| { |
| if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) |
| return false; |
| |
| while (atomic_cmpxchg(&lock->val, 0, _Q_LOCKED_VAL) != 0) |
| cpu_relax(); |
| |
| return true; |
| } |
| |
| #include <asm-generic/qspinlock.h> |
| |
| #endif /* _ASM_X86_QSPINLOCK_H */ |