linux-kernel - [PATCH] PM / wakeup: Drop wakeup_source

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Date:   Mon, 11 Mar 2019 12:53:59 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux PM <linux-pm@...r.kernel.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] PM / wakeup: Drop wakeup_source_drop()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

After commit d856f39ac1cc ("PM / wakeup: Rework wakeup source timer
cancellation") wakeup_source_drop() is a trivial wrapper around
__pm_relax() and it has no users except for wakeup_source_destroy()
and wakeup_source_trash() which also has no users, so drop it along
with the latter and make wakeup_source_destroy() call __pm_relax()
directly.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

Commit d856f39ac1cc is in the bleeding-edge branch of the linux-pm.git tree.

---
 drivers/base/power/wakeup.c |   18 +-----------------
 include/linux/pm_wakeup.h   |    9 ---------
 2 files changed, 1 insertion(+), 26 deletions(-)

Index: linux-pm/include/linux/pm_wakeup.h
===================================================================
--- linux-pm.orig/include/linux/pm_wakeup.h
+++ linux-pm/include/linux/pm_wakeup.h
@@ -96,7 +96,6 @@ static inline void device_set_wakeup_pat
 /* 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_drop(struct wakeup_source *ws);
 extern void wakeup_source_destroy(struct wakeup_source *ws);
 extern void wakeup_source_add(struct wakeup_source *ws);
 extern void wakeup_source_remove(struct wakeup_source *ws);
@@ -134,8 +133,6 @@ static inline struct wakeup_source *wake
 	return NULL;
 }
 
-static inline void wakeup_source_drop(struct wakeup_source *ws) {}
-
 static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
 
 static inline void wakeup_source_add(struct wakeup_source *ws) {}
@@ -204,12 +201,6 @@ static inline void wakeup_source_init(st
 	wakeup_source_add(ws);
 }
 
-static inline void wakeup_source_trash(struct wakeup_source *ws)
-{
-	wakeup_source_remove(ws);
-	wakeup_source_drop(ws);
-}
-
 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
 {
 	return pm_wakeup_ws_event(ws, msec, false);
Index: linux-pm/drivers/base/power/wakeup.c
===================================================================
--- linux-pm.orig/drivers/base/power/wakeup.c
+++ linux-pm/drivers/base/power/wakeup.c
@@ -106,22 +106,6 @@ struct wakeup_source *wakeup_source_crea
 }
 EXPORT_SYMBOL_GPL(wakeup_source_create);
 
-/**
- * wakeup_source_drop - Prepare a struct wakeup_source object for destruction.
- * @ws: Wakeup source to prepare for destruction.
- *
- * Callers must ensure that __pm_stay_awake() or __pm_wakeup_event() will never
- * be run in parallel with this function for the same wakeup source object.
- */
-void wakeup_source_drop(struct wakeup_source *ws)
-{
-	if (!ws)
-		return;
-
-	__pm_relax(ws);
-}
-EXPORT_SYMBOL_GPL(wakeup_source_drop);
-
 /*
  * Record wakeup_source statistics being deleted into a dummy wakeup_source.
  */
@@ -161,7 +145,7 @@ void wakeup_source_destroy(struct wakeup
 	if (!ws)
 		return;
 
-	wakeup_source_drop(ws);
+	__pm_relax(ws);
 	wakeup_source_record(ws);
 	kfree_const(ws->name);
 	kfree(ws);