tree 423af910fd85e2b05619601631a6b06d4a368df8
parent 59a37f8baeb2c9d97f316584c90892d18bf846d4
author Jan Kara <jack@suse.cz> 1467097439 +0200
committer Jens Axboe <axboe@fb.com> 1467123704 -0600

block: Convert fifo_time from ulong to u64

Currently rq->fifo_time is unsigned long but CFQ stores nanosecond
timestamp in it which would overflow on 32-bit archs. Convert it to u64
to avoid the overflow. Since the rq->fifo_time is unioned with struct
call_single_data(), this does not change the size of struct request in
any way.

We have to slightly fixup block/deadline-iosched.c so that comparison
happens in the right types.

Fixes: 9a7f38c42c2b92391d9dabaf9f51df7cfe5608e4
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>