[alsa-devel] [PATCH] ALSA: line6: constify snd_kcontrol_new structures

[Bhumika Goyal]

Declare snd_kcontrol_new strcutures as const as they are only passed as
an argument to the function snd_ctl_new1. This argument is of type const,
so snd_kcontrol_new structures having this property can be made const too.
Done using Coccinelle:

@r disable optional_qualifier@
identifier x;
position p;
@@
static struct snd_kcontrol_new x at p={...};

@ok@
identifier r.x;
position p;
@@
snd_ctl_new1(&x at p,...)

@bad@
position p != {r.p,ok.p};
identifier r.x;
@@
x at p

@depends on !bad disable optional_qualifier@
identifier r.x;
@@
+const
struct snd_kcontrol_new x;

Signed-off-by: Bhumika Goyal <bhumirks at gmail.com>
---
 sound/usb/line6/pod.c      | 2 +-
 sound/usb/line6/toneport.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/usb/line6/pod.c b/sound/usb/line6/pod.c
index 17aa616..358224c 100644
--- a/sound/usb/line6/pod.c
+++ b/sound/usb/line6/pod.c
@@ -380,7 +380,7 @@ static int snd_pod_control_monitor_put(struct snd_kcontrol *kcontrol,
 }
 
 /* control definition */
-static struct snd_kcontrol_new pod_control_monitor = {
+static const struct snd_kcontrol_new pod_control_monitor = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Monitor Playback Volume",
 	.index = 0,
diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c
index 8e22f43..ba7975c 100644
--- a/sound/usb/line6/toneport.c
+++ b/sound/usb/line6/toneport.c
@@ -250,7 +250,7 @@ static void toneport_start_pcm(unsigned long arg)
 }
 
 /* control definition */
-static struct snd_kcontrol_new toneport_control_monitor = {
+static const struct snd_kcontrol_new toneport_control_monitor = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Monitor Playback Volume",
 	.index = 0,
@@ -261,7 +261,7 @@ static struct snd_kcontrol_new toneport_control_monitor = {
 };
 
 /* source selector definition */
-static struct snd_kcontrol_new toneport_control_source = {
+static const struct snd_kcontrol_new toneport_control_source = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "PCM Capture Source",
 	.index = 0,
-- 
2.7.4