linux-kernel - [PATCH 8/9] xilinx_hwicap: make icap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230620143751.578239-17-gregkh@linuxfoundation.org>
Date:   Tue, 20 Jun 2023 16:37:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ivan Orlov <ivan.orlov0322@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Michal Simek <michal.simek@....com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-arm-kernel@...ts.infradead.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 8/9] xilinx_hwicap: make icap_class a static const structure

From: Ivan Orlov <ivan.orlov0322@...il.com>

Now that the driver core allows for struct class to be in read-only
memory, move the icap_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at load time.

Cc: Arnd Bergmann <arnd@...db.de>
Cc: Michal Simek <michal.simek@....com>
Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc: Ivan Orlov <ivan.orlov0322@...il.com>
Cc: linux-arm-kernel@...ts.infradead.org
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/xilinx_hwicap/xilinx_hwicap.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index a46f637da959..527153313a30 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -113,7 +113,9 @@ static DEFINE_MUTEX(hwicap_mutex);
 static bool probed_devices[HWICAP_DEVICES];
 static struct mutex icap_sem;
 
-static struct class *icap_class;
+static const struct class icap_class = {
+	.name = "xilinx_config",
+};
 
 #define UNIMPLEMENTED 0xFFFF
 
@@ -687,7 +689,7 @@ static int hwicap_setup(struct device *dev, int id,
 		goto failed3;
 	}
 
-	device_create(icap_class, dev, devt, NULL, "%s%d", DRIVER_NAME, id);
+	device_create(&icap_class, dev, devt, NULL, "%s%d", DRIVER_NAME, id);
 	return 0;		/* success */
 
  failed3:
@@ -730,7 +732,7 @@ static int hwicap_remove(struct device *dev)
 	if (!drvdata)
 		return 0;
 
-	device_destroy(icap_class, drvdata->devt);
+	device_destroy(&icap_class, drvdata->devt);
 	cdev_del(&drvdata->cdev);
 	iounmap(drvdata->base_address);
 	release_mem_region(drvdata->mem_start, drvdata->mem_size);
@@ -856,7 +858,9 @@ static int __init hwicap_module_init(void)
 	dev_t devt;
 	int retval;
 
-	icap_class = class_create("xilinx_config");
+	retval = class_register(&icap_class);
+	if (retval)
+		return retval;
 	mutex_init(&icap_sem);
 
 	devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);
@@ -882,7 +886,7 @@ static void __exit hwicap_module_cleanup(void)
 {
 	dev_t devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);
 
-	class_destroy(icap_class);
+	class_unregister(&icap_class);
 
 	platform_driver_unregister(&hwicap_platform_driver);
 
-- 
2.41.0