Re: copy_from_user/copy_to_user question

[Andi Kleen]

Steven Rostedt <rostedt@xxxxxxxxxxx> writes:
> 
> I haven't dealt (yet) with the copy_user of x86_64.  Is there a problem
> when one tries to copy to/from a 32 bit address while in a 64 bit
> address space?

No problem, except on UML/x86-64 which has fully separate address spaces.

Architectures where it doesn't work include s390,m68k,pa-risc,sparc64,
i386 with 4/4 patches among others.

-Andi
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