#include <linux/device.h>
#include <linux/tty.h>
#include <linux/kmod.h>
+#include <linux/smp_lock.h>
/*
* Head entry for the doubly linked miscdevice list
int err = -ENODEV;
const struct file_operations *old_fops, *new_fops = NULL;
+ lock_kernel();
mutex_lock(&misc_mtx);
list_for_each_entry(c, &misc_list, list) {
fops_put(old_fops);
fail:
mutex_unlock(&misc_mtx);
+ unlock_kernel();
return err;
}
misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
dev = MKDEV(MISC_MAJOR, misc->minor);
- misc->this_device = device_create(misc_class, misc->parent, dev,
+ misc->this_device = device_create(misc_class, misc->parent, dev, NULL,
"%s", misc->name);
if (IS_ERR(misc->this_device)) {
err = PTR_ERR(misc->this_device);
* indicates an error.
*/
-int misc_deregister(struct miscdevice * misc)
+int misc_deregister(struct miscdevice *misc)
{
int i = misc->minor;
static int __init misc_init(void)
{
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *ent;
+ int err;
- ent = create_proc_entry("misc", 0, NULL);
- if (ent)
- ent->proc_fops = &misc_proc_fops;
+#ifdef CONFIG_PROC_FS
+ proc_create("misc", 0, NULL, &misc_proc_fops);
#endif
misc_class = class_create(THIS_MODULE, "misc");
+ err = PTR_ERR(misc_class);
if (IS_ERR(misc_class))
- return PTR_ERR(misc_class);
+ goto fail_remove;
- if (register_chrdev(MISC_MAJOR,"misc",&misc_fops)) {
- printk("unable to get major %d for misc devices\n",
- MISC_MAJOR);
- class_destroy(misc_class);
- return -EIO;
- }
+ err = -EIO;
+ if (register_chrdev(MISC_MAJOR,"misc",&misc_fops))
+ goto fail_printk;
return 0;
+
+fail_printk:
+ printk("unable to get major %d for misc devices\n", MISC_MAJOR);
+ class_destroy(misc_class);
+fail_remove:
+ remove_proc_entry("misc", NULL);
+ return err;
}
subsys_initcall(misc_init);