1 files changed, 78 insertions, 18 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 0742c938dfa7..cdb7e9457ba6 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -134,19 +134,39 @@ static int notifier_chain_unregister(struct notifier_block **nl,
 	return -ENOENT;
 }
 
+/**
+ * notifier_call_chain - Informs the registered notifiers about an event.
+ *	@nl:		Pointer to head of the blocking notifier chain
+ *	@val:		Value passed unmodified to notifier function
+ *	@v:		Pointer passed unmodified to notifier function
+ *	@nr_to_call:	Number of notifier functions to be called. Don't care
+ *		     	value of this parameter is -1.
+ *	@nr_calls:	Records the number of notifications sent. Don't care
+ *		   	value of this field is NULL.
+ * 	@returns:	notifier_call_chain returns the value returned by the
+ *			last notifier function called.
+ */
+
 static int __kprobes notifier_call_chain(struct notifier_block **nl,
-		unsigned long val, void *v)
+					unsigned long val, void *v,
+					int nr_to_call,	int *nr_calls)
 {
 	int ret = NOTIFY_DONE;
 	struct notifier_block *nb, *next_nb;
 
 	nb = rcu_dereference(*nl);
-	while (nb) {
+
+	while (nb && nr_to_call) {
 		next_nb = rcu_dereference(nb->next);
 		ret = nb->notifier_call(nb, val, v);
+
+		if (nr_calls)
+			(*nr_calls)++;
+
 		if ((ret & NOTIFY_STOP_MASK) == NOTIFY_STOP_MASK)
 			break;
 		nb = next_nb;
+		nr_to_call--;
 	}
 	return ret;
 }
@@ -205,10 +225,12 @@ int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh,
 EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
 
 /**
- *	atomic_notifier_call_chain - Call functions in an atomic notifier chain
+ *	__atomic_notifier_call_chain - Call functions in an atomic notifier chain
  *	@nh: Pointer to head of the atomic notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See the comment for notifier_call_chain.
+ *	@nr_calls: See the comment for notifier_call_chain.
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in an atomic context, so they must not block.
@@ -222,19 +244,27 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
  *	of the last notifier function called.
  */
  
-int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
-		unsigned long val, void *v)
+int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+					unsigned long val, void *v,
+					int nr_to_call, int *nr_calls)
 {
 	int ret;
 
 	rcu_read_lock();
-	ret = notifier_call_chain(&nh->head, val, v);
+	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	rcu_read_unlock();
 	return ret;
 }
 
-EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
+EXPORT_SYMBOL_GPL(__atomic_notifier_call_chain);
+
+int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __atomic_notifier_call_chain(nh, val, v, -1, NULL);
+}
 
+EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
 /*
  *	Blocking notifier chain routines.  All access to the chain is
  *	synchronized by an rwsem.
@@ -304,10 +334,12 @@ int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh,
 EXPORT_SYMBOL_GPL(blocking_notifier_chain_unregister);
 
 /**
- *	blocking_notifier_call_chain - Call functions in a blocking notifier chain
+ *	__blocking_notifier_call_chain - Call functions in a blocking notifier chain
  *	@nh: Pointer to head of the blocking notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain.
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in a process context, so they are allowed to block.
@@ -320,8 +352,9 @@ EXPORT_SYMBOL_GPL(blocking_notifier_chain_unregister);
  *	of the last notifier function called.
  */
  
-int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
-		unsigned long val, void *v)
+int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+				   unsigned long val, void *v,
+				   int nr_to_call, int *nr_calls)
 {
 	int ret = NOTIFY_DONE;
 
@@ -332,12 +365,19 @@ int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
 	 */
 	if (rcu_dereference(nh->head)) {
 		down_read(&nh->rwsem);
-		ret = notifier_call_chain(&nh->head, val, v);
+		ret = notifier_call_chain(&nh->head, val, v, nr_to_call,
+					nr_calls);
 		up_read(&nh->rwsem);
 	}
 	return ret;
 }
+EXPORT_SYMBOL_GPL(__blocking_notifier_call_chain);
 
+int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __blocking_notifier_call_chain(nh, val, v, -1, NULL);
+}
 EXPORT_SYMBOL_GPL(blocking_notifier_call_chain);
 
 /*
@@ -383,10 +423,12 @@ int raw_notifier_chain_unregister(struct raw_notifier_head *nh,
 EXPORT_SYMBOL_GPL(raw_notifier_chain_unregister);
 
 /**
- *	raw_notifier_call_chain - Call functions in a raw notifier chain
+ *	__raw_notifier_call_chain - Call functions in a raw notifier chain
  *	@nh: Pointer to head of the raw notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in an undefined context.
@@ -400,10 +442,19 @@ EXPORT_SYMBOL_GPL(raw_notifier_chain_unregister);
  *	of the last notifier function called.
  */
 
+int __raw_notifier_call_chain(struct raw_notifier_head *nh,
+			      unsigned long val, void *v,
+			      int nr_to_call, int *nr_calls)
+{
+	return notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
+}
+
+EXPORT_SYMBOL_GPL(__raw_notifier_call_chain);
+
 int raw_notifier_call_chain(struct raw_notifier_head *nh,
 		unsigned long val, void *v)
 {
-	return notifier_call_chain(&nh->head, val, v);
+	return __raw_notifier_call_chain(nh, val, v, -1, NULL);
 }
 
 EXPORT_SYMBOL_GPL(raw_notifier_call_chain);
@@ -478,10 +529,12 @@ int srcu_notifier_chain_unregister(struct srcu_notifier_head *nh,
 EXPORT_SYMBOL_GPL(srcu_notifier_chain_unregister);
 
 /**
- *	srcu_notifier_call_chain - Call functions in an SRCU notifier chain
+ *	__srcu_notifier_call_chain - Call functions in an SRCU notifier chain
  *	@nh: Pointer to head of the SRCU notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in a process context, so they are allowed to block.
@@ -494,18 +547,25 @@ EXPORT_SYMBOL_GPL(srcu_notifier_chain_unregister);
  *	of the last notifier function called.
  */
 
-int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
-		unsigned long val, void *v)
+int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+			       unsigned long val, void *v,
+			       int nr_to_call, int *nr_calls)
 {
 	int ret;
 	int idx;
 
 	idx = srcu_read_lock(&nh->srcu);
-	ret = notifier_call_chain(&nh->head, val, v);
+	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	srcu_read_unlock(&nh->srcu, idx);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(__srcu_notifier_call_chain);
 
+int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __srcu_notifier_call_chain(nh, val, v, -1, NULL);
+}
 EXPORT_SYMBOL_GPL(srcu_notifier_call_chain);
 
 /**
@@ -881,7 +941,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 #ifdef CONFIG_SOFTWARE_SUSPEND
 	case LINUX_REBOOT_CMD_SW_SUSPEND:
 		{
-			int ret = pm_suspend(PM_SUSPEND_DISK);
+			int ret = hibernate();
 			unlock_kernel();
 			return ret;
 		}