Okay, I have answers, but none are pretty (and I don't even know if it is cross platform -- so I cannot use it as I'm on the ARM not the x86).
Option 1) there is a section of code that looks something like this:
But, as I stated, this code works for the x86 and I don't know about the other platforms.
old_fs = get_fs();
/* call the kernel functions */
Option 2) Allocate memory with kmalloc in GFP_USER space. I have know idea whether that would work and I don't like the idea of the overhead anyways.
Option 3) ((this is the one I did)) The call that I was wanting to use was a call from my ioctl() to my read and write functions that are registered. Being that these are registered, both must follow the format
and write is about the same thing. I had to adjust this code to look for something that might clue me in that this is an in-house read. I don't use loff_t * in my code as this is not that kind of driver. If this pointer is NULL, I build a struct that I send back up to the user from the ioctl() and use copy_to_user() to copy the kernel space struct up to the buf supplied. Dreadful hack, I know, but we'll see if it works.
ssize_t *read(struct file *, char __user *, size_t, loff_t *)
If you have anything better to add, please pass it along.