Man pages for alloc_chrdev_region(), register_chrdev() etc system calls

Question

I need to know where can I find the man pages for the system calls/routines related to device drivers:

register_chrdev()

alloc_chrdev_region()

...etc. I searched in the below links and found definitions:

Polarhome

Unix

What I need: There are no header file(s) details where the given call's prototypes present, return types, error conditions etc. and explanations as given in those of man pages in GNU/Linux!

It makes me think: Are they really system calls or something else specifically called! If they are system calls, why aren't there any man pages in Linux like we do as man open , man close , man socket etc.

Answer 1

You can't find the man pages for them. They are the built-in functions that are defined in the /include/linux/fs.h file. If you go through them, you can find their definitions.