Assign values to function pointers in common struct objects in Linux Kernel

Common assignment operations can be implemented in either of the two methods. There are many methods in the books related to Linux kernel programming. The Linux system compiled by Zhou ligong is built on the driver.ProgramMethod 2 is seen in the Development example, so it is strange to write two typesCodeAll labs are successful.

Assignment Operation Method 1:

Static struct file_operations file_ops_4_our_proc_file = {
. Read = module_output,
. Write = module_input,
. Open = module_open,
. Release = module_close,
};

 

Method 2:

Static struct file_operations file_ops_4_our_proc_file = {
Read: module_output,
Write: module_input,
Open: module_open,
Release: module_close,
};