add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/last.c
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@@ -1,22 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  Advanced Linux Sound Architecture
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  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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- *
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- *
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- *   This program is free software; you can redistribute it and/or modify
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- *   it under the terms of the GNU General Public License as published by
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- *   the Free Software Foundation; either version 2 of the License, or
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- *   (at your option) any later version.
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- *
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- *   This program is distributed in the hope that it will be useful,
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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- *
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- *   You should have received a copy of the GNU General Public License
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- *   along with this program; if not, write to the Free Software
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- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
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- *
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  */
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 #include <linux/init.h>
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@@ -24,14 +9,18 @@
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 static int __init alsa_sound_last_init(void)
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 {
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+	struct snd_card *card;
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 	int idx, ok = 0;
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 	printk(KERN_INFO "ALSA device list:\n");
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-	for (idx = 0; idx < SNDRV_CARDS; idx++)
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-		if (snd_cards[idx] != NULL) {
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-			printk(KERN_INFO "  #%i: %s\n", idx, snd_cards[idx]->longname);
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+	for (idx = 0; idx < SNDRV_CARDS; idx++) {
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+		card = snd_card_ref(idx);
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+		if (card) {
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+			printk(KERN_INFO "  #%i: %s\n", idx, card->longname);
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+			snd_card_unref(card);
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 			ok++;
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 		}
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+	}
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 	if (ok == 0)
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 		printk(KERN_INFO "  No soundcards found.\n");
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 	return 0;