tree 53376636381d6a01afae72ed8541266f60a7afae
parent 4eff96dd5283a102e0c1cac95247090be74a38ed
author Chuansheng Liu <chuansheng.liu@intel.com> 1353976194 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1353980484 -0800

watchdog: using u64 in get_sample_period()

In get_sample_period(), unsigned long is not enough:

  watchdog_thresh * 2 * (NSEC_PER_SEC / 5)

case1:
  watchdog_thresh is 10 by default, the sample value will be: 0xEE6B2800

case2:
 set watchdog_thresh is 20, the sample value will be: 0x1 DCD6 5000

In case2, we need use u64 to express the sample period.  Otherwise,
changing the threshold thru proc often can not be successful.

Signed-off-by: liu chuansheng <chuansheng.liu@intel.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>