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mips: sibyte: make tb_class constant 

Since commit 43a7206b09 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the tb_class structure to be declared at build time placing
it into read-only memory, instead of having to be dynamically allocated at
boot time.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Ricardo B. Marliere 2024-03-05 10:37:51 -03:00 committed by Thomas Bogendoerfer
parent e5d9592c86
commit 8b2de7402f
1 changed files with 9 additions and 12 deletions
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21
arch/mips/sibyte/common/sb_tbprof.c
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@ -535,13 +535,14 @@ static const struct file_operations sbprof_tb_fops = {
.llseek = default_llseek,
};
static struct class *tb_class;
static const struct class tb_class = {
.name = "sb_tracebuffer",
};
static struct device *tb_dev;
static int __init sbprof_tb_init(void)
{
struct device *dev;
struct class *tbc;
int err;
if (register_chrdev(SBPROF_TB_MAJOR, DEVNAME, &sbprof_tb_fops)) {
@ -550,15 +551,11 @@ static int __init sbprof_tb_init(void)
return -EIO;
}
tbc = class_create("sb_tracebuffer");
if (IS_ERR(tbc)) {
err = PTR_ERR(tbc);
err = class_register(&tb_class);
if (err)
goto out_chrdev;
}
tb_class = tbc;
dev = device_create(tbc, NULL, MKDEV(SBPROF_TB_MAJOR, 0), NULL, "tb");
dev = device_create(&tb_class, NULL, MKDEV(SBPROF_TB_MAJOR, 0), NULL, "tb");
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
goto out_class;
@ -573,7 +570,7 @@ static int __init sbprof_tb_init(void)
return 0;
out_class:
class_destroy(tb_class);
class_unregister(&tb_class);
out_chrdev:
unregister_chrdev(SBPROF_TB_MAJOR, DEVNAME);
@ -582,9 +579,9 @@ out_chrdev:
static void __exit sbprof_tb_cleanup(void)
{
device_destroy(tb_class, MKDEV(SBPROF_TB_MAJOR, 0));
device_destroy(&tb_class, MKDEV(SBPROF_TB_MAJOR, 0));
unregister_chrdev(SBPROF_TB_MAJOR, DEVNAME);
class_destroy(tb_class);
class_unregister(&tb_class);
}
module_init(sbprof_tb_init);