[ALSA] clean up device types symbols

Modules: ALSA Core,ALSA Minor Numbers

Remove the unused and undefined symbols SNDRV_DEVICE_TYPE_{MIXER,
PCM_PLOOP,PCM_CLOOP}, and introduce a new symbol SNDRV_MINOR_GLOBAL
for non-card-specific devices like the sequencer or the timer.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

include/sound/minors.h

@@ -27,8 +27,9 @@
 #define SNDRV_MINOR(card, dev)		(((card) << 5) | (dev))
 
 #define SNDRV_MINOR_CONTROL		0	/* 0 - 0 */
-#define SNDRV_MINOR_SEQUENCER		1
-#define SNDRV_MINOR_TIMER		(1+32)
+#define SNDRV_MINOR_GLOBAL		1	/* 1 */
+#define SNDRV_MINOR_SEQUENCER		(SNDRV_MINOR_GLOBAL + 0 * 32)
+#define SNDRV_MINOR_TIMER		(SNDRV_MINOR_GLOBAL + 1 * 32)
 #define SNDRV_MINOR_HWDEP		4	/* 4 - 7 */
 #define SNDRV_MINOR_HWDEPS		4
 #define SNDRV_MINOR_RAWMIDI		8	/* 8 - 15 */
@@ -39,12 +40,9 @@
 
 #define SNDRV_DEVICE_TYPE_CONTROL	SNDRV_MINOR_CONTROL
 #define SNDRV_DEVICE_TYPE_HWDEP		SNDRV_MINOR_HWDEP
-#define SNDRV_DEVICE_TYPE_MIXER		SNDRV_MINOR_MIXER
 #define SNDRV_DEVICE_TYPE_RAWMIDI	SNDRV_MINOR_RAWMIDI
 #define SNDRV_DEVICE_TYPE_PCM_PLAYBACK	SNDRV_MINOR_PCM_PLAYBACK
-#define SNDRV_DEVICE_TYPE_PCM_PLOOP	SNDRV_MINOR_PCM_PLOOP
 #define SNDRV_DEVICE_TYPE_PCM_CAPTURE	SNDRV_MINOR_PCM_CAPTURE
-#define SNDRV_DEVICE_TYPE_PCM_CLOOP	SNDRV_MINOR_PCM_CLOOP
 #define SNDRV_DEVICE_TYPE_SEQUENCER	SNDRV_MINOR_SEQUENCER
 #define SNDRV_DEVICE_TYPE_TIMER		SNDRV_MINOR_TIMER
 

sound/core/sound.c

@@ -130,7 +130,7 @@ static int snd_open(struct inode *inode, struct file *file)
 	struct file_operations *old_fops;
 	int err = 0;
 
-	if (dev != SNDRV_MINOR_SEQUENCER && dev != SNDRV_MINOR_TIMER) {
+	if (dev != SNDRV_MINOR_GLOBAL) {
 		if (snd_cards[card] == NULL) {
 #ifdef CONFIG_KMOD
 			snd_request_card(card);
@@ -287,7 +287,7 @@ static void snd_minor_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buf
 	for (card = 0; card < SNDRV_CARDS; card++) {
 		list_for_each(list, &snd_minors_hash[card]) {
 			mptr = list_entry(list, snd_minor_t, list);
-			if (SNDRV_MINOR_DEVICE(mptr->number) != SNDRV_MINOR_SEQUENCER) {
+			if (SNDRV_MINOR_DEVICE(mptr->number) != SNDRV_MINOR_GLOBAL) {
 				if ((device = mptr->device) >= 0)
 					snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, device, mptr->comment);
 				else