[v8,1/3] PM / wakeup: Drop wakeup_source_init(), wakeup_source_prepare()
diff mbox series

Message ID 20190807014846.143949-2-trong@android.com
State Mainlined, archived
Headers show
Series
  • PM / wakeup: Show wakeup sources stats in sysfs
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Commit Message

Tri Vo Aug. 7, 2019, 1:48 a.m. UTC
wakeup_source_init() has no users. Remove it.

As a result, wakeup_source_prepare() is only called from
wakeup_source_create(). Merge wakeup_source_prepare() into
wakeup_source_create() and remove it.

Change wakeup_source_create() behavior so that assigning NULL to wakeup
source's name throws an error.

Signed-off-by: Tri Vo <trong@android.com>
---
 drivers/base/power/wakeup.c | 33 +++++++++++++--------------------
 include/linux/pm_wakeup.h   | 11 -----------
 2 files changed, 13 insertions(+), 31 deletions(-)

Comments

Greg Kroah-Hartman Aug. 7, 2019, 11:09 a.m. UTC | #1
On Tue, Aug 06, 2019 at 06:48:44PM -0700, Tri Vo wrote:
> wakeup_source_init() has no users. Remove it.
> 
> As a result, wakeup_source_prepare() is only called from
> wakeup_source_create(). Merge wakeup_source_prepare() into
> wakeup_source_create() and remove it.
> 
> Change wakeup_source_create() behavior so that assigning NULL to wakeup
> source's name throws an error.

The kernel C code can not "throw" errors :)

Anyway, odd verbage asside, patch looks good to me:

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd Aug. 7, 2019, 3 p.m. UTC | #2
Quoting Tri Vo (2019-08-06 18:48:44)
> wakeup_source_init() has no users. Remove it.
> 
> As a result, wakeup_source_prepare() is only called from
> wakeup_source_create(). Merge wakeup_source_prepare() into
> wakeup_source_create() and remove it.
> 
> Change wakeup_source_create() behavior so that assigning NULL to wakeup
> source's name throws an error.
> 
> Signed-off-by: Tri Vo <trong@android.com>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Patch
diff mbox series

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index ee31d4f8d856..3938892c8903 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -72,23 +72,6 @@  static struct wakeup_source deleted_ws = {
 	.lock =  __SPIN_LOCK_UNLOCKED(deleted_ws.lock),
 };
 
-/**
- * wakeup_source_prepare - Prepare a new wakeup source for initialization.
- * @ws: Wakeup source to prepare.
- * @name: Pointer to the name of the new wakeup source.
- *
- * Callers must ensure that the @name string won't be freed when @ws is still in
- * use.
- */
-void wakeup_source_prepare(struct wakeup_source *ws, const char *name)
-{
-	if (ws) {
-		memset(ws, 0, sizeof(*ws));
-		ws->name = name;
-	}
-}
-EXPORT_SYMBOL_GPL(wakeup_source_prepare);
-
 /**
  * wakeup_source_create - Create a struct wakeup_source object.
  * @name: Name of the new wakeup source.
@@ -96,13 +79,23 @@  EXPORT_SYMBOL_GPL(wakeup_source_prepare);
 struct wakeup_source *wakeup_source_create(const char *name)
 {
 	struct wakeup_source *ws;
+	const char *ws_name;
 
-	ws = kmalloc(sizeof(*ws), GFP_KERNEL);
+	ws = kzalloc(sizeof(*ws), GFP_KERNEL);
 	if (!ws)
-		return NULL;
+		goto err_ws;
+
+	ws_name = kstrdup_const(name, GFP_KERNEL);
+	if (!ws_name)
+		goto err_name;
+	ws->name = ws_name;
 
-	wakeup_source_prepare(ws, name ? kstrdup_const(name, GFP_KERNEL) : NULL);
 	return ws;
+
+err_name:
+	kfree(ws);
+err_ws:
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(wakeup_source_create);
 
diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h
index 91027602d137..c0cad2d8f800 100644
--- a/include/linux/pm_wakeup.h
+++ b/include/linux/pm_wakeup.h
@@ -81,7 +81,6 @@  static inline void device_set_wakeup_path(struct device *dev)
 }
 
 /* drivers/base/power/wakeup.c */
-extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);
 extern struct wakeup_source *wakeup_source_create(const char *name);
 extern void wakeup_source_destroy(struct wakeup_source *ws);
 extern void wakeup_source_add(struct wakeup_source *ws);
@@ -112,9 +111,6 @@  static inline bool device_can_wakeup(struct device *dev)
 	return dev->power.can_wakeup;
 }
 
-static inline void wakeup_source_prepare(struct wakeup_source *ws,
-					 const char *name) {}
-
 static inline struct wakeup_source *wakeup_source_create(const char *name)
 {
 	return NULL;
@@ -181,13 +177,6 @@  static inline void pm_wakeup_dev_event(struct device *dev, unsigned int msec,
 
 #endif /* !CONFIG_PM_SLEEP */
 
-static inline void wakeup_source_init(struct wakeup_source *ws,
-				      const char *name)
-{
-	wakeup_source_prepare(ws, name);
-	wakeup_source_add(ws);
-}
-
 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
 {
 	return pm_wakeup_ws_event(ws, msec, false);