From patchwork Tue Dec 19 15:22:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 13498446 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 64583C41535 for ; Tue, 19 Dec 2023 15:23:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=2OmN/ybhNAscKZ4ZPL/S5njeQiuNmGGqR3kvpnWqvR4=; b=R9EfR7FEFhrOoC oc7CkO+3StyIZQSsxeryu6iVfxDx0WilQ2LorRmCCFD8uQZm32VcNsPR3w6ZwbpEy3wO7VEz948kf V4xy4y5nNz1EUWo2KOZGSLykgLRaekXX410lFX4kIyDYPfHKrgF/IOFAw8bdSbFzenXw0BpQvTn/G xTeIag3KDeMg+fZhOctexwwHmzC2W1GeXXyKLpoTRW1QPvI+yYpnf1CCqStB9K2+ZUudM2DQduEJW BXa7+WmMY9I/4xfyl0RoIOTJqfdRqtI/RPUZgAXtlp8/Tp41ap08EYnO2WkAVjOOL2j8SpEWeExzY 6ntoGcTWRXm/r7N3A+dQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rFbvr-00EXKy-1o; Tue, 19 Dec 2023 15:22:55 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rFbvn-00EXJo-2B; Tue, 19 Dec 2023 15:22:53 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by ams.source.kernel.org (Postfix) with ESMTP id A426AB81856; Tue, 19 Dec 2023 15:22:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D439FC433C8; Tue, 19 Dec 2023 15:22:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1702999369; bh=vOJ9fKH6Xqs5UvwP9s7vsM9ZkdDZzxdG2BYm96rLvAY=; h=From:To:Cc:Subject:Date:From; b=WsR5eIqpOuTF0cIbg+QKbJk945zH4aWyXTOIY1x3RQA0jbBvivNWsuj7e6Upmrryd RyL951N7XwvzbPbR4ViNCIRb5JLQqt7ZEr7thVILxZfFjWkwanT8MVZ+xBn2ZcerUg bXjNwD7NXCrngu8Maaslp8kRTGGO1BmBMQOT/Ooc= From: Greg Kroah-Hartman To: wsa@kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Heiko Stuebner , linux-i2c@vger.kernel.org, linux-sound@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Subject: [PATCH] i2c: make i2c_bus_type const Date: Tue, 19 Dec 2023 16:22:43 +0100 Message-ID: <2023121942-jumble-unethical-3163@gregkh> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2417; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=vOJ9fKH6Xqs5UvwP9s7vsM9ZkdDZzxdG2BYm96rLvAY=; b=owGbwMvMwCRo6H6F97bub03G02pJDKmNW51Sba1dDtXZnllysInD6hGjp6HmpIbM+iDrWF39f x6PXrh0xLIwCDIxyIopsnzZxnN0f8UhRS9D29Mwc1iZQIYwcHEKwEQKIhjm2U4SyLvO9cnsvoJq 3W9WhQ+C58WMGObp7bSdUBOyNC9E6FVt/PQlO9Sz518HAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231219_072251_998141_0FA44776 X-CRM114-Status: GOOD ( 16.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Now that the driver core can properly handle constant struct bus_type, move the i2c_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Note, the sound/soc/rockchip/rk3399_gru_sound.c also needed tweaking as it decided to save off a pointer to a bus type for internal stuff, and it was using the i2c_bus_type as well. Cc: Wolfram Sang Cc: Liam Girdwood Cc: Mark Brown Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Heiko Stuebner Cc: linux-i2c@vger.kernel.org Cc: linux-sound@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-rockchip@lists.infradead.org Signed-off-by: Greg Kroah-Hartman Acked-by: Mark Brown --- drivers/i2c/i2c-core-base.c | 2 +- include/linux/i2c.h | 2 +- sound/soc/rockchip/rk3399_gru_sound.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index eac90a3cf61a..24c6e1b52668 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -689,7 +689,7 @@ static struct attribute *i2c_dev_attrs[] = { }; ATTRIBUTE_GROUPS(i2c_dev); -struct bus_type i2c_bus_type = { +const struct bus_type i2c_bus_type = { .name = "i2c", .match = i2c_device_match, .probe = i2c_device_probe, diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 0dae9db27538..180462d1a373 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -23,7 +23,7 @@ #include /* for swab16 */ #include -extern struct bus_type i2c_bus_type; +extern const struct bus_type i2c_bus_type; extern struct device_type i2c_adapter_type; extern struct device_type i2c_client_type; diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c index 1a504ebd3a0e..6c89c7331229 100644 --- a/sound/soc/rockchip/rk3399_gru_sound.c +++ b/sound/soc/rockchip/rk3399_gru_sound.c @@ -446,7 +446,7 @@ static const struct rockchip_sound_route rockchip_routes[] = { struct dailink_match_data { const char *compatible; - struct bus_type *bus_type; + const struct bus_type *bus_type; }; static const struct dailink_match_data dailink_match[] = {