diff options
| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-06-20 17:37:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-23 11:27:13 +0300 |
| commit | 7671284b6c77df93b7dad8be40fe354dd4243a5d (patch) | |
| tree | ebb6c6d0a732b4e84de85f838fe3442a3af1cebd /drivers/char | |
| parent | 03bcd4d8e9e6da7521b1bdff4116bfed9050cfa9 (diff) | |
| download | linux-7671284b6c77df93b7dad8be40fe354dd4243a5d.tar.xz | |
/dev/mem: make mem_class a static const structure
Now that the driver core allows for struct class to be in read-only
memory, move the mem_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@arndb.de>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230620143751.578239-13-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/mem.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index f494d31f2b98..2f944522f18f 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -753,20 +753,23 @@ static char *mem_devnode(const struct device *dev, umode_t *mode) return NULL; } -static struct class *mem_class; +static const struct class mem_class = { + .name = "mem", + .devnode = mem_devnode, +}; static int __init chr_dev_init(void) { + int retval; int minor; if (register_chrdev(MEM_MAJOR, "mem", &memory_fops)) printk("unable to get major %d for memory devs\n", MEM_MAJOR); - mem_class = class_create("mem"); - if (IS_ERR(mem_class)) - return PTR_ERR(mem_class); + retval = class_register(&mem_class); + if (retval) + return retval; - mem_class->devnode = mem_devnode; for (minor = 1; minor < ARRAY_SIZE(devlist); minor++) { if (!devlist[minor].name) continue; @@ -777,7 +780,7 @@ static int __init chr_dev_init(void) if ((minor == DEVPORT_MINOR) && !arch_has_dev_port()) continue; - device_create(mem_class, NULL, MKDEV(MEM_MAJOR, minor), + device_create(&mem_class, NULL, MKDEV(MEM_MAJOR, minor), NULL, devlist[minor].name); } |