From patchwork Tue Jun 20 09:44:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 694887 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 CE2BAEB64D8 for ; Tue, 20 Jun 2023 09:44:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232402AbjFTJol (ORCPT ); Tue, 20 Jun 2023 05:44:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231149AbjFTJoh (ORCPT ); Tue, 20 Jun 2023 05:44:37 -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 B1ECD130 for ; Tue, 20 Jun 2023 02:44:36 -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 416AF610AB for ; Tue, 20 Jun 2023 09:44:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A1D0C433C0; Tue, 20 Jun 2023 09:44:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687254275; bh=jRoxHpEH6o3hriylQl2EejlWbKyFU4k4XcAWEeQP31c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XS98Sg7wZbPaFyd5rOQO2wITqjOgGEfhAuQPlg2y3jA3OGzU2yai1ILsxZLVHLiDd VFHkNsJKDqW3zq0TwWRZpfRXF5evjsma9P1s+M+XT+qQOyyb90QAq3Bbxp3nQ0MFI0 rrJaUwiXoG4F1Xl02YgxVii8hb1shlP3qIYvo4VU= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: Ivan Orlov , Greg Kroah-Hartman Subject: [PATCH 3/6] USB: mon: make mon_bin_class a static const structure Date: Tue, 20 Jun 2023 11:44:15 +0200 Message-ID: <20230620094412.508580-9-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230620094412.508580-7-gregkh@linuxfoundation.org> References: <20230620094412.508580-7-gregkh@linuxfoundation.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2451; i=gregkh@linuxfoundation.org; h=from:subject; bh=Sg3k3k+cW+qn7rgFBlXisILddDj1GQWBllomMvxjyJI=; b=owGbwMvMwCRo6H6F97bub03G02pJDCkTS97reupWi4mVbWk5zqfeevyMTvMqSa3HpVdPTHzY/ qBnmkJJRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEzk1FyG+W4Jn1kuMz6Pzdv5 M3v5cpvKDpNn6QwLLhz6eJ7P3FcvRGff6uYWa6dI05wvAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Ivan Orlov Now that the driver core allows for struct class to be in read-only memory, move the mon_bin_class structure to be declared at build time placing it into read-only memory, instead of having to be dynamically allocated at load time. Suggested-by: Greg Kroah-Hartman Signed-off-by: Ivan Orlov Signed-off-by: Greg Kroah-Hartman --- drivers/usb/mon/mon_bin.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 952c56789258..9ca9305243fe 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -213,7 +213,10 @@ static unsigned char xfer_to_pipe[4] = { PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT }; -static struct class *mon_bin_class; +static const struct class mon_bin_class = { + .name = "usbmon", +}; + static dev_t mon_bin_dev0; static struct cdev mon_bin_cdev; @@ -1360,7 +1363,7 @@ int mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus) if (minor >= MON_BIN_MAX_MINOR) return 0; - dev = device_create(mon_bin_class, ubus ? ubus->controller : NULL, + dev = device_create(&mon_bin_class, ubus ? ubus->controller : NULL, MKDEV(MAJOR(mon_bin_dev0), minor), NULL, "usbmon%d", minor); if (IS_ERR(dev)) @@ -1372,18 +1375,16 @@ int mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus) void mon_bin_del(struct mon_bus *mbus) { - device_destroy(mon_bin_class, mbus->classdev->devt); + device_destroy(&mon_bin_class, mbus->classdev->devt); } int __init mon_bin_init(void) { int rc; - mon_bin_class = class_create("usbmon"); - if (IS_ERR(mon_bin_class)) { - rc = PTR_ERR(mon_bin_class); + rc = class_register(&mon_bin_class); + if (rc) goto err_class; - } rc = alloc_chrdev_region(&mon_bin_dev0, 0, MON_BIN_MAX_MINOR, "usbmon"); if (rc < 0) @@ -1401,7 +1402,7 @@ int __init mon_bin_init(void) err_add: unregister_chrdev_region(mon_bin_dev0, MON_BIN_MAX_MINOR); err_dev: - class_destroy(mon_bin_class); + class_unregister(&mon_bin_class); err_class: return rc; } @@ -1410,5 +1411,5 @@ void mon_bin_exit(void) { cdev_del(&mon_bin_cdev); unregister_chrdev_region(mon_bin_dev0, MON_BIN_MAX_MINOR); - class_destroy(mon_bin_class); + class_unregister(&mon_bin_class); }