A certain codepath in the random driver relied on vt_ioctl() being under
the BKL and implicitly disabling preemption.  The code wasn't buggy
upstream but it's slighly unrobust so I think we want the fix upstream too,
independently of the remove-bkl patch.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>