[ALSA] alsa core: convert to list_for_each_entry*

This patch converts most uses of list_for_each to list_for_each_entry all
across alsa. In some place apparently an item can be on a list with
different pointers so of course that isn't compatible with list_for_each, I
therefore didn't touch those places.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/core/hwdep.c

@@ -47,14 +47,11 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device);
 
 static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
 {
-	struct list_head *p;
 	struct snd_hwdep *hwdep;
 
-	list_for_each(p, &snd_hwdep_devices) {
-		hwdep = list_entry(p, struct snd_hwdep, list);
+	list_for_each_entry(hwdep, &snd_hwdep_devices, list)
 		if (hwdep->card == card && hwdep->device == device)
 			return hwdep;
-	}
 	return NULL;
 }
 
@@ -468,15 +465,12 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device)
 static void snd_hwdep_proc_read(struct snd_info_entry *entry,
 				struct snd_info_buffer *buffer)
 {
-	struct list_head *p;
 	struct snd_hwdep *hwdep;
 
 	mutex_lock(&register_mutex);
-	list_for_each(p, &snd_hwdep_devices) {
-		hwdep = list_entry(p, struct snd_hwdep, list);
+	list_for_each_entry(hwdep, &snd_hwdep_devices, list)
 		snd_iprintf(buffer, "%02i-%02i: %s\n",
 			    hwdep->card->number, hwdep->device, hwdep->name);
-	}
 	mutex_unlock(&register_mutex);
 }