Linux Device Drivers Development

ksets

Kernel object sets (ksets) mainly group related kernel objects together. ksets are a collection of kobjects. In other words, a kset gathers related kobjects into a single place, for example, all block devices:

struct kset { 
   struct list_head list;  
   spinlock_t list_lock; 
   struct kobject kobj; 
 }; 

The preceding structure can be explained as follows:

• list is a linked list of all kobjects in the kset
• list_lock is a spinlock protecting linked list access
• kobj represents the base class for the set

Each registered (added-to-the-system) kset corresponds to a sysfs directory. A kset can be created and added using the kset_create_and_add() function, and removed with the kset_unregister() function:

struct kset * kset_create_and_add(const char *name, ...