Differences between development character drivers in linux2.4 and 2.6

Differences between development character drivers in linux2.4 and 2.6-Linux general technology-Linux programming and kernel information. For more information, see the following. The definition of struct file_operation has changed:

In 2.4, it is generally read: xxread

2.6 to. read = xxread

The registration method for character device drivers is different:

2.6 kernel Registration Method

(1) static registration
Int register_chrdev_region (dev_t from, unsigned count, char * name );

(2) Dynamic Registration
Int alloc_chrdev_region (dev_t * dev, unsigned baseminor, unsigned count, char * name );

2.4 kernel Registration Method
Int register_chrdev (unsigned major, char * name, struct file_operation * fops );

The 2.4 kernel only generates the. o file. The 2.6 kernel module extension is. ko.