Comparing get_jiffies_64() is almost always wrong and time_before64 and
time_after64 should be used instead.

Warn on any comparison to get_jiffies_64().
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>