I haven't found a function, but you might access proc_root
directly.
It is located in fs/proc/root.c and should be accessible from outside.
Question
I could use following code to get the /proc entry, but how to get the /proc entry directly? Any function in the kernel to do this directly(without creating one dummy sub-entry)?
new_proc = proc_create("dummy", 0644, 0, &fileops_struct);
root = new_proc->parent;
Solution
I haven't found a function, but you might access proc_root
directly.
It is located in fs/proc/root.c and should be accessible from outside.