PM / wakeup: wakeup_source_create: use kstrdup_const

Using kstrdup_const allows us to save a little runtime memory (and a
string copy) in the common case where name is a string literal.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 3b361ecfaffcbb5186e4bd73ced3034bb3b02dfd..a1e0b9ab847a345c6a09adab3ff9f2fd9af3ad3e 100644 (file)
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -94,7 +94,7 @@ struct wakeup_source *wakeup_source_create(const char *name)
        if (!ws)
                return NULL;
 
-       wakeup_source_prepare(ws, name ? kstrdup(name, GFP_KERNEL) : NULL);
+       wakeup_source_prepare(ws, name ? kstrdup_const(name, GFP_KERNEL) : NULL);
        return ws;
 }
 EXPORT_SYMBOL_GPL(wakeup_source_create);
@@ -157,7 +157,7 @@ void wakeup_source_destroy(struct wakeup_source *ws)
 
        wakeup_source_drop(ws);
        wakeup_source_record(ws);
-       kfree(ws->name);
+       kfree_const(ws->name);
        kfree(ws);
 }
 EXPORT_SYMBOL_GPL(wakeup_source_destroy);