On Fri, May 17, 2013 at 05:40:43PM +0800, Jeff Liu wrote: > Hi Michael, > > Are you compiling kernel on 32-bit system? > > Looks this issue is regarding 64-bit division at roundup() on 32-bit if so. roundup_64() is what you want, then. Cheers, Dave. -- Dave Chinner david at fromorbit.com