Hello, Before File I/O( read or write using f_op->read or f_op->write ) in kernel space, why is it that the following is done oldfs = get_fs(); set_fs(KERNEL_DS); read /write set_fs(oldfs); What is KERNEL_DS ? and what is the functionality of get_fs() and set_fs(). kindly bear with me for the disclaimer attachment. I am helpless about this. Thanks a lot in advance, kind regards, daniel marian.
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