copy_from_user() function fails inside a kernel thread.
I am working on PowerPC based target board using linux-22.214.171.124-DENX.
I have designed a device driver that calls the function copy_from_user() inside IOCTL , READ & WRITE functions of the driver.
I dont have any problem in this.
My problem :-
If I use the same function inside of a kernel thread started by the driver, then the copy_from_user() always fails.