Don Raikes <don.raikes at oracle.com> wrote: > If (copy_to_user(buf, tbuf2, count)) > > Buf is defined in the parameter list of my function as: > Const char __user * buf It's also the destination of the copy, so it shouldn't be const. You're declaring the buffer as const, then passing it to a function that will write to it. This is why the compiler complains that you're discarding the const qualifier when you pass this parameter to the function. Does that help? It's probably best to remove the "const" from the declaration of buf. Alternatively, you can use a cast expression in the call to copy_to_user, but declaring a parameter as constant and then casting that away is not a good practice in my personal view.
