From patchwork Fri Jan 5 10:32:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 760427 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77599250E7; Fri, 5 Jan 2024 10:32:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XvBMOKWv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61627C433C7; Fri, 5 Jan 2024 10:32:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1704450774; bh=tAtGPzyENe7G8V+fHZtEGeUbT9NOsNspX0RJlOE6D7g=; h=From:To:Cc:Subject:Date:From; b=XvBMOKWvx8Ihe9KWS7Xectnpfug8yO72QOOc4B2sgHXITIfWrS9HqDO1TGQltXTRf vbG9e9YXxghuZYH21HDTNjZn8JTnkUhOE19GkfDHEcWD6SW2IX7uZLNehpNWdofx42 UuCGkto3q9uTq6EGlVX0YXEAzrzjWOfxpU22E2fs= From: Greg Kroah-Hartman To: broonie@kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , linux-spi@vger.kernel.org Subject: [PATCH] spi: make spi_bus_type const Date: Fri, 5 Jan 2024 11:32:50 +0100 Message-ID: <2024010549-erasure-swoop-1cc6@gregkh> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1336; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=tAtGPzyENe7G8V+fHZtEGeUbT9NOsNspX0RJlOE6D7g=; b=owGbwMvMwCRo6H6F97bub03G02pJDKnTb13iW7v2mPKxmbuzzdd9fqhSfezLz7tp0etP1/c/c 9iypWOOfkcsC4MgE4OsmCLLl208R/dXHFL0MrQ9DTOHlQlkCAMXpwBMxKKZYQ5Pbqy9l+VZDV7z P9fvvt+yMapSSZBhweSzN++FlLXxX12a/2J32qN7HporQwE= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Now that the driver core can properly handle constant struct bus_type, move the spi_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Mark Brown Cc: linux-spi@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi.c | 2 +- include/linux/spi/spi.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 8ead7acb99f3..6e962befc450 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -459,7 +459,7 @@ static void spi_shutdown(struct device *dev) } } -struct bus_type spi_bus_type = { +const struct bus_type spi_bus_type = { .name = "spi", .dev_groups = spi_dev_groups, .match = spi_match_device, diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 255a0562aea5..f6c157dee55d 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -33,7 +33,7 @@ struct spi_message; * INTERFACES between SPI master-side drivers and SPI slave protocol handlers, * and SPI infrastructure. */ -extern struct bus_type spi_bus_type; +extern const struct bus_type spi_bus_type; /** * struct spi_statistics - statistics for spi transfers