[PATCH] NULL noise removal in sound/usb/*

sound/usb/usbaudio.c

@@ -898,11 +898,11 @@ static void release_urb_ctx(snd_urb_ctx_t *u)
 {
 	if (u->urb) {
 		usb_free_urb(u->urb);
-		u->urb = 0;
+		u->urb = NULL;
 	}
 	if (u->buf) {
 		kfree(u->buf);
-		u->buf = 0;
+		u->buf = NULL;
 	}
 }
 
@@ -923,7 +923,7 @@ static void release_substream_urbs(snd_usb_substream_t *subs, int force)
 		release_urb_ctx(&subs->syncurb[i]);
 	if (subs->tmpbuf) {
 		kfree(subs->tmpbuf);
-		subs->tmpbuf = 0;
+		subs->tmpbuf = NULL;
 	}
 	subs->nurbs = 0;
 }

sound/usb/usbmixer.c

@@ -574,7 +574,7 @@ static void usb_mixer_elem_free(snd_kcontrol_t *kctl)
 {
 	if (kctl->private_data) {
 		snd_magic_kfree((void *)kctl->private_data);
-		kctl->private_data = 0;
+		kctl->private_data = NULL;
 	}
 }
 
@@ -1318,7 +1318,7 @@ static void usb_mixer_selector_elem_free(snd_kcontrol_t *kctl)
 		usb_mixer_elem_info_t *cval = snd_magic_cast(usb_mixer_elem_info_t, kctl->private_data,);
 		num_ins = cval->max;
 		snd_magic_kfree(cval);
-		kctl->private_data = 0;
+		kctl->private_data = NULL;
 	}
 	if (kctl->private_value) {
 		char **itemlist = (char **)kctl->private_value;