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authorIvan Orlov <ivan.orlov0322@gmail.com>2023-06-20 16:38:00 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-06-23 10:27:26 +0200
commit9ee202e69e29470e3a0a2406493538378d4e9a85 (patch)
treec8761ee96bf7c2005c93918c704cd74060183c1e /drivers/char
parentxilinx_hwicap: make icap_class a static const structure (diff)
downloadlinux-9ee202e69e29470e3a0a2406493538378d4e9a85.tar.xz
linux-9ee202e69e29470e3a0a2406493538378d4e9a85.zip
char: xillybus: make xillybus_class a static const structure
Now that the driver core allows for struct class to be in read-only memory, move the xillybus_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: Eli Billauer <eli.billauer@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com> Acked-by: Eli Billauer <eli.billauer@gmail.com> Link: https://lore.kernel.org/r/20230620143751.578239-18-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/xillybus/xillybus_class.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/char/xillybus/xillybus_class.c b/drivers/char/xillybus/xillybus_class.c
index 89926fe9d813..c92a628e389e 100644
--- a/drivers/char/xillybus/xillybus_class.c
+++ b/drivers/char/xillybus/xillybus_class.c
@@ -23,7 +23,9 @@ MODULE_LICENSE("GPL v2");
static DEFINE_MUTEX(unit_mutex);
static LIST_HEAD(unit_list);
-static struct class *xillybus_class;
+static const struct class xillybus_class = {
+ .name = "xillybus",
+};
#define UNITNAMELEN 16
@@ -121,7 +123,7 @@ int xillybus_init_chrdev(struct device *dev,
len -= namelen + 1;
idt += namelen + 1;
- device = device_create(xillybus_class,
+ device = device_create(&xillybus_class,
NULL,
MKDEV(unit->major,
i + unit->lowest_minor),
@@ -152,7 +154,7 @@ int xillybus_init_chrdev(struct device *dev,
unroll_device_create:
for (i--; i >= 0; i--)
- device_destroy(xillybus_class, MKDEV(unit->major,
+ device_destroy(&xillybus_class, MKDEV(unit->major,
i + unit->lowest_minor));
cdev_del(unit->cdev);
@@ -193,7 +195,7 @@ void xillybus_cleanup_chrdev(void *private_data,
for (minor = unit->lowest_minor;
minor < (unit->lowest_minor + unit->num_nodes);
minor++)
- device_destroy(xillybus_class, MKDEV(unit->major, minor));
+ device_destroy(&xillybus_class, MKDEV(unit->major, minor));
cdev_del(unit->cdev);
@@ -242,19 +244,12 @@ EXPORT_SYMBOL(xillybus_find_inode);
static int __init xillybus_class_init(void)
{
- xillybus_class = class_create("xillybus");
-
- if (IS_ERR(xillybus_class)) {
- pr_warn("Failed to register xillybus class\n");
-
- return PTR_ERR(xillybus_class);
- }
- return 0;
+ return class_register(&xillybus_class);
}
static void __exit xillybus_class_exit(void)
{
- class_destroy(xillybus_class);
+ class_unregister(&xillybus_class);
}
module_init(xillybus_class_init);