1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index 78e6989ffb54..b2c4f8299464 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -20,6 +20,8 @@ int in_lock_functions(unsigned long addr);
 #define assert_spin_locked(x)   BUG_ON(!spin_is_locked(x))
 
 void __lockfunc _spin_lock(spinlock_t *lock)            __acquires(spinlock_t);
+void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
+                                                        __acquires(spinlock_t);
 void __lockfunc _read_lock(rwlock_t *lock)              __acquires(rwlock_t);
 void __lockfunc _write_lock(rwlock_t *lock)             __acquires(rwlock_t);
 void __lockfunc _spin_lock_bh(spinlock_t *lock)         __acquires(spinlock_t);