This reverts commit 786dc1d3d7333f269e17d742886eac2188a2d9cc.
As Al so eloquently points out, the patch is crap. The old code was fine,
the new code was bogus.
It never dereferenced a user pointer, the "->" operator was to an array
member, which gives the _address_ of the member (in user space), not an
actual dereference at all.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>