On Tue, 2003-06-03 at 07:42, Ashutosh Mehra wrote:
> Hi!
>
> I was recently trying a few Loadable Kernel Modules with Linux, and the
> traditional "Hello World!" module worked fine, except that I couldnt
> find which header file contains the prototype of printk() (gcc with
> -Wall gave a warning). Does any one know where is this function prototyped?
Have you tried grep? It's your friend. It would have quicky shown you
it is in include/linux/kernel.h
> Now for the bigger problem: When I opened /usr/include/linux/fs.h, I
> didn't find the definition of the "struct file{}", which I needed for a
> module, though it was there in /usr/src/linux-2.4/include/linux/fs.h.
> The /usr/include header contained only a portion of the kernel header.
> So my question is this: How do I get the definition if "file struct".
> Which are the correct headers to be used in the modules: the kernel
> headers from the src/ directory, or from the /usr/include directory?
Looks like you already found it. #include <linux/fs.h>
As others have said over and over. Do not include any
headers from /usr/include in any Linux kernel code. Don't
even think about doing it.
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