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Subject[PATCH 1-fix/4] Fix extend notifier_call_chain to count nr_calls made.
Hi Andrew,

Please apply the following patch on top of
extend-notifier_call_chain-to-count-nr_calls-made.patch.
This patch incorporates the Randy's suggestions.

thanks,
gautham.


This patch

* Corrects the type of nr_calls to int * from unsigned int * in
notifier_call_chain and it's subsequent callers.

* Converts comments of notifier_call_chain to be compliant with kernel-docs
standards.

*Reverts the changes made to the comments of other *_notifier_call_chain.

*Adds parameter names to a few functions prototypes in
include/linux/notifier.h .

Depends on patch: extend-notifier_call_chain-to-count-nr_calls-made.patch


Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>

--
include/linux/notifier.h | 58 +++++++++++++++++++++++------------------------
kernel/sys.c | 24 ++++++++-----------
2 files changed, 39 insertions(+), 43 deletions(-)
Index: hotplug/kernel/sys.c
===================================================================
--- hotplug.orig/kernel/sys.c
+++ hotplug/kernel/sys.c
@@ -134,9 +134,8 @@ static int notifier_chain_unregister(str
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
@@ -144,14 +143,13 @@ static int notifier_chain_unregister(str
* value of this parameter is -1.
* @nr_calls: Records the number of notifications sent. Don't care
* value of this field is NULL.
- *
- * RETURN VALUE: notifier_call_chain returns the value returned by the
+ * @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,
- int nr_to_call, unsigned int *nr_calls)
+ int nr_to_call, int *nr_calls)
{
int ret = NOTIFY_DONE;
struct notifier_block *nb, *next_nb;
@@ -227,8 +225,7 @@ int atomic_notifier_chain_unregister(str
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
@@ -249,7 +246,7 @@ EXPORT_SYMBOL_GPL(atomic_notifier_chain_

int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v,
- int nr_to_call, unsigned int *nr_calls)
+ int nr_to_call, int *nr_calls)
{
int ret;

@@ -337,8 +334,7 @@ int blocking_notifier_chain_unregister(s
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
@@ -358,7 +354,7 @@ EXPORT_SYMBOL_GPL(blocking_notifier_chai

int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
unsigned long val, void *v,
- int nr_to_call, unsigned int * nr_calls)
+ int nr_to_call, int *nr_calls)
{
int ret;

@@ -442,7 +438,7 @@ EXPORT_SYMBOL_GPL(raw_notifier_chain_unr

int __raw_notifier_call_chain(struct raw_notifier_head *nh,
unsigned long val, void *v,
- int nr_to_call, unsigned int *nr_calls)
+ int nr_to_call, int *nr_calls)
{
return notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
}
@@ -527,7 +523,7 @@ int srcu_notifier_chain_unregister(struc
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
@@ -547,7 +543,7 @@ EXPORT_SYMBOL_GPL(srcu_notifier_chain_un

int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
unsigned long val, void *v,
- int nr_to_call, unsigned int *nr_calls)
+ int nr_to_call, int *nr_calls)
{
int ret;
int idx;
Index: hotplug/include/linux/notifier.h
===================================================================
--- hotplug.orig/include/linux/notifier.h
+++ hotplug/include/linux/notifier.h
@@ -112,40 +112,40 @@ extern void srcu_init_notifier_head(stru

#ifdef __KERNEL__

-extern int atomic_notifier_chain_register(struct atomic_notifier_head *,
- struct notifier_block *);
-extern int blocking_notifier_chain_register(struct blocking_notifier_head *,
- struct notifier_block *);
-extern int raw_notifier_chain_register(struct raw_notifier_head *,
- struct notifier_block *);
-extern int srcu_notifier_chain_register(struct srcu_notifier_head *,
- struct notifier_block *);
-
-extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *,
- struct notifier_block *);
-extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *,
- struct notifier_block *);
-extern int raw_notifier_chain_unregister(struct raw_notifier_head *,
- struct notifier_block *);
-extern int srcu_notifier_chain_unregister(struct srcu_notifier_head *,
- struct notifier_block *);
+extern int atomic_notifier_chain_register(struct atomic_notifier_head *nh,
+ struct notifier_block *nb);
+extern int blocking_notifier_chain_register(struct blocking_notifier_head *nh,
+ struct notifier_block *nb);
+extern int raw_notifier_chain_register(struct raw_notifier_head *nh,
+ struct notifier_block *nb);
+extern int srcu_notifier_chain_register(struct srcu_notifier_head *nh,
+ struct notifier_block *nb);
+
+extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh,
+ struct notifier_block *nb);
+extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh,
+ struct notifier_block *nb);
+extern int raw_notifier_chain_unregister(struct raw_notifier_head *nh,
+ struct notifier_block *nb);
+extern int srcu_notifier_chain_unregister(struct srcu_notifier_head *nh,
+ struct notifier_block *nb);

-extern int atomic_notifier_call_chain(struct atomic_notifier_head *,
+extern int atomic_notifier_call_chain(struct atomic_notifier_head *nh,
unsigned long val, void *v);
-extern int __atomic_notifier_call_chain(struct atomic_notifier_head *,
- unsigned long val, void *v, int nr_to_call, unsigned int *nr_calls);
-extern int blocking_notifier_call_chain(struct blocking_notifier_head *,
+extern int __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+ unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
unsigned long val, void *v);
-extern int __blocking_notifier_call_chain(struct blocking_notifier_head *,
- unsigned long val, void *v, int nr_to_call, unsigned int *nr_calls);
-extern int raw_notifier_call_chain(struct raw_notifier_head *,
+extern int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+ unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int raw_notifier_call_chain(struct raw_notifier_head *nh,
unsigned long val, void *v);
-extern int __raw_notifier_call_chain(struct raw_notifier_head *,
- unsigned long val, void *v, int nr_to_call, unsigned int *nr_calls);
-extern int srcu_notifier_call_chain(struct srcu_notifier_head *,
+extern int __raw_notifier_call_chain(struct raw_notifier_head *nh,
+ unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
unsigned long val, void *v);
-extern int __srcu_notifier_call_chain(struct srcu_notifier_head *,
- unsigned long val, void *v, int nr_to_call, unsigned int *nr_calls);
+extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+ unsigned long val, void *v, int nr_to_call, int *nr_calls);

#define NOTIFY_DONE 0x0000 /* Don't care */
#define NOTIFY_OK 0x0001 /* Suits me */
--
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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