From: William Lee Irwin III <wli@holomorphy.com>

start_jiffies was not respected by set_timeout(), which reread jiffies
instead of respecting what read_events() passed it.  This difference can be
significant, particularly if the calling process slept during the
copy_to_user() operation in read_events().  To correct this, this patch
teaches it to respect its argument, with the additional bonus of converting
it to use timespec_to_jiffies() instead of open-coding it.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>