remove the last set_fs() in common code, and remove it for x86 and powerpc v3

[Ingo Molnar]

* Christoph Hellwig <hch at lst.de> wrote:

> Hi all,
> 
> this series removes the last set_fs() used to force a kernel address
> space for the uaccess code in the kernel read/write/splice code, and then
> stops implementing the address space overrides entirely for x86 and
> powerpc.

Cool! For the x86 bits:

  Acked-by: Ingo Molnar <mingo at kernel.org>

Thanks,

	Ingo