From nobody Sat Feb 7 21:52:58 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43584EB64D8 for ; Tue, 20 Jun 2023 17:56:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230488AbjFTR4r (ORCPT ); Tue, 20 Jun 2023 13:56:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230484AbjFTR4m (ORCPT ); Tue, 20 Jun 2023 13:56:42 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7FD41728 for ; Tue, 20 Jun 2023 10:56:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 67E6B61348 for ; Tue, 20 Jun 2023 17:56:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7049FC433CC; Tue, 20 Jun 2023 17:56:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687283799; bh=LEAe0NsxUirzrz1/vb7i4AnyoOYRet9FQaA6901ajn0=; h=From:To:Cc:Subject:Date:From; b=YIRZ/eYWd+fOtXdsGARBHdShsNOAhtDClS5GCF3QOhXmq3zYHqvR6bRLS5oMTGbY/ g5r1Xq/8squEOcLnwH2mdVIudEjsRTTwIbSO/0XC0epo+/6/FCLptoxsDT9mWg99m7 DI5ts+0H2ESi+keQ7H9Vvkus61ejCdGW76DCc7Jg= From: Greg Kroah-Hartman To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, Ivan Orlov , Jaroslav Kysela , Takashi Iwai , Greg Kroah-Hartman , Geoff Levand , Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Subject: [PATCH] sound: make all 'class' structures const Date: Tue, 20 Jun 2023 19:56:34 +0200 Message-ID: <20230620175633.641141-2-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=4811; i=gregkh@linuxfoundation.org; h=from:subject; bh=1cb14i/gwAIZV/k9GgRzsiloc4sYqdiaG2JT6hlz55Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDCkTXwRKPnlQtZJ9S+He/186Pqt+XnTrxfOIDYHX+7wlO 76ma3RIdMSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBENDYyLFj88XGRTZ0p69lD e/aVeqt35QbdFmVYcLLR+uaX3+5HWn2sM/69zfrGuIIhBwA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ivan Orlov Now that the driver core allows for struct class to be in read-only memory, making all 'class' structures to be declared at build time placing them into read-only memory, instead of having to be dynamically allocated at load time. Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Ivan Orlov Cc: Greg Kroah-Hartman Cc: Geoff Levand Cc: Thierry Reding Cc: "Uwe Kleine-K=C3=B6nig" Cc: alsa-devel@alsa-project.org Suggested-by: Greg Kroah-Hartman Signed-off-by: Ivan Orlov Signed-off-by: Greg Kroah-Hartman --- include/sound/core.h | 2 +- sound/core/control_led.c | 2 +- sound/core/init.c | 4 ++-- sound/sound_core.c | 23 ++++++++++++----------- 4 files changed, 16 insertions(+), 15 deletions(-) diff --git a/include/sound/core.h b/include/sound/core.h index 3edc4ab08774..bbcecfff723d 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -232,7 +232,7 @@ static inline struct device *snd_card_get_device_link(s= truct snd_card *card) =20 extern int snd_major; extern int snd_ecards_limit; -extern struct class *sound_class; +extern const struct class sound_class; #ifdef CONFIG_SND_DEBUG extern struct dentry *sound_debugfs_root; #endif diff --git a/sound/core/control_led.c b/sound/core/control_led.c index 3cadd40100f3..ee77547bf8dc 100644 --- a/sound/core/control_led.c +++ b/sound/core/control_led.c @@ -737,7 +737,7 @@ static int __init snd_ctl_led_init(void) unsigned int group; =20 device_initialize(&snd_ctl_led_dev); - snd_ctl_led_dev.class =3D sound_class; + snd_ctl_led_dev.class =3D &sound_class; snd_ctl_led_dev.release =3D snd_ctl_led_dev_release; dev_set_name(&snd_ctl_led_dev, "ctl-led"); if (device_add(&snd_ctl_led_dev)) { diff --git a/sound/core/init.c b/sound/core/init.c index df0c22480375..baef2688d0cf 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -129,7 +129,7 @@ void snd_device_initialize(struct device *dev, struct s= nd_card *card) device_initialize(dev); if (card) dev->parent =3D &card->card_dev; - dev->class =3D sound_class; + dev->class =3D &sound_class; dev->release =3D default_release; } EXPORT_SYMBOL_GPL(snd_device_initialize); @@ -331,7 +331,7 @@ static int snd_card_init(struct snd_card *card, struct = device *parent, =20 device_initialize(&card->card_dev); card->card_dev.parent =3D parent; - card->card_dev.class =3D sound_class; + card->card_dev.class =3D &sound_class; card->card_dev.release =3D release_card_device; card->card_dev.groups =3D card->dev_groups; card->dev_groups[0] =3D &card_dev_attr_group; diff --git a/sound/sound_core.c b/sound/sound_core.c index 4f6911274d56..d81fed1c1226 100644 --- a/sound/sound_core.c +++ b/sound/sound_core.c @@ -23,9 +23,6 @@ static inline int init_oss_soundcore(void) { return 0; } static inline void cleanup_oss_soundcore(void) { } #endif =20 -struct class *sound_class; -EXPORT_SYMBOL(sound_class); - MODULE_DESCRIPTION("Core sound module"); MODULE_AUTHOR("Alan Cox"); MODULE_LICENSE("GPL"); @@ -37,6 +34,12 @@ static char *sound_devnode(const struct device *dev, umo= de_t *mode) return kasprintf(GFP_KERNEL, "snd/%s", dev_name(dev)); } =20 +const struct class sound_class =3D { + .name =3D "sound", + .devnode =3D sound_devnode, +}; +EXPORT_SYMBOL(sound_class); + static int __init init_soundcore(void) { int rc; @@ -45,21 +48,19 @@ static int __init init_soundcore(void) if (rc) return rc; =20 - sound_class =3D class_create("sound"); - if (IS_ERR(sound_class)) { + rc =3D class_register(&sound_class); + if (rc) { cleanup_oss_soundcore(); - return PTR_ERR(sound_class); + return rc; } =20 - sound_class->devnode =3D sound_devnode; - return 0; } =20 static void __exit cleanup_soundcore(void) { cleanup_oss_soundcore(); - class_destroy(sound_class); + class_unregister(&sound_class); } =20 subsys_initcall(init_soundcore); @@ -276,7 +277,7 @@ static int sound_insert_unit(struct sound_unit **list, = const struct file_operati } } =20 - device_create(sound_class, dev, MKDEV(SOUND_MAJOR, s->unit_minor), + device_create(&sound_class, dev, MKDEV(SOUND_MAJOR, s->unit_minor), NULL, "%s", s->name+6); return s->unit_minor; =20 @@ -302,7 +303,7 @@ static void sound_remove_unit(struct sound_unit **list,= int unit) if (!preclaim_oss) __unregister_chrdev(SOUND_MAJOR, p->unit_minor, 1, p->name); - device_destroy(sound_class, MKDEV(SOUND_MAJOR, p->unit_minor)); + device_destroy(&sound_class, MKDEV(SOUND_MAJOR, p->unit_minor)); kfree(p); } } --=20 2.41.0