BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _write_lock_irqsave(lock); \
} while (0)
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define spin_lock_irqsave_nested(lock, flags, subclass) \
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ flags = _spin_lock_irqsave_nested(lock, subclass); \
+ } while (0)
+#else
+#define spin_lock_irqsave_nested(lock, flags, subclass) \
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ flags = _spin_lock_irqsave(lock); \
+ } while (0)
+#endif
+
#else
#define spin_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_write_lock_irqsave(lock, flags); \
} while (0)
+#define spin_lock_irqsave_nested(lock, flags, subclass) \
+ spin_lock_irqsave(lock, flags)
+
#endif
#define spin_lock_irq(lock) _spin_lock_irq(lock)
void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
__acquires(lock);
+unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+ __acquires(lock);
unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
}
EXPORT_SYMBOL(_spin_lock_nested);
+unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ preempt_disable();
+ spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+ /*
+ * On lockdep we dont want the hand-coded irq-enable of
+ * _raw_spin_lock_flags() code, because lockdep assumes
+ * that interrupts are not re-enabled during lock-acquire:
+ */
+#ifdef CONFIG_PROVE_SPIN_LOCKING
+ _raw_spin_lock(lock);
+#else
+ _raw_spin_lock_flags(lock, &flags);
+#endif
+ return flags;
+}
+
+EXPORT_SYMBOL(_spin_lock_irqsave_nested);
#endif