tree 49828c00687c810627f00430dd56ce9901537fc9
parent 30996f40bffe73f05abb92a4cec254befa8cecf7
author Corrado Zoccolo <czoccolo@gmail.com> 1254725363 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1254733435 +0200

cfq-iosched: fix possible problem with jiffies wraparound

The RR service tree is indexed by a key that is relative to current jiffies.
This can cause problems on jiffies wraparound.

The patch fixes it using time_before comparison, and changing
the add_front path to use a relative number, too.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>