From patchwork Tue Jun 20 17:56:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 13286314 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B25E0EB64D8 for ; Tue, 20 Jun 2023 17:58:16 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 8186782C; Tue, 20 Jun 2023 19:57:21 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 8186782C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1687283892; bh=LEAe0NsxUirzrz1/vb7i4AnyoOYRet9FQaA6901ajn0=; h=From:To:Cc:Subject:Date:List-Id:List-Archive:List-Help:List-Owner: List-Post:List-Subscribe:List-Unsubscribe:From; b=Sh7H3L7M9+tr/YDqjoj6reOX9tblD6wkHJOZrAkiyLJs79hEiKjJBJ/PLxnpguwuq BWq68sqFi+NlHGbvnEVAmP268z5wdz7Gre51JuLnrH8skOh2spux3m7ZoT+CCqP6Lv fIH8zkXHDgNFaHu9irpo/4/KFKjoH7weHY0PE14k= Received: by alsa1.perex.cz (Postfix, from userid 50401) id A6E93F80141; Tue, 20 Jun 2023 19:56:54 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 61EB4F80141; Tue, 20 Jun 2023 19:56:54 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id A1E6EF80141; Tue, 20 Jun 2023 19:56:50 +0200 (CEST) Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id EC204F80130 for ; Tue, 20 Jun 2023 19:56:42 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz EC204F80130 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=YIRZ/eYW 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 5FD8C61336; 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_Kleine-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 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 Message-ID-Hash: 4SLHOPCCKP54KFLHQFPN6YD6PFDEMDZN X-Message-ID-Hash: 4SLHOPCCKP54KFLHQFPN6YD6PFDEMDZN X-MailFrom: gregkh@linuxfoundation.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: 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-König" 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(struct snd_card *card) 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; device_initialize(&snd_ctl_led_dev); - snd_ctl_led_dev.class = sound_class; + snd_ctl_led_dev.class = &sound_class; snd_ctl_led_dev.release = 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 snd_card *card) device_initialize(dev); if (card) dev->parent = &card->card_dev; - dev->class = sound_class; + dev->class = &sound_class; dev->release = default_release; } EXPORT_SYMBOL_GPL(snd_device_initialize); @@ -331,7 +331,7 @@ static int snd_card_init(struct snd_card *card, struct device *parent, device_initialize(&card->card_dev); card->card_dev.parent = parent; - card->card_dev.class = sound_class; + card->card_dev.class = &sound_class; card->card_dev.release = release_card_device; card->card_dev.groups = card->dev_groups; card->dev_groups[0] = &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 -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, umode_t *mode) return kasprintf(GFP_KERNEL, "snd/%s", dev_name(dev)); } +const struct class sound_class = { + .name = "sound", + .devnode = 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; - sound_class = class_create("sound"); - if (IS_ERR(sound_class)) { + rc = class_register(&sound_class); + if (rc) { cleanup_oss_soundcore(); - return PTR_ERR(sound_class); + return rc; } - sound_class->devnode = sound_devnode; - return 0; } static void __exit cleanup_soundcore(void) { cleanup_oss_soundcore(); - class_destroy(sound_class); + class_unregister(&sound_class); } subsys_initcall(init_soundcore); @@ -276,7 +277,7 @@ static int sound_insert_unit(struct sound_unit **list, const struct file_operati } } - 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; @@ -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); } }