On Thu, Jan 10, 2019 at 11:02:05AM +0800, Chunyan Zhang wrote: > From: Vincent Wang <[email protected]> > > When a task that is in_iowait state is enqueued, cpufreq_update_util() > will be invoked with SCHED_CPUFREQ_IOWAIT flag. In this case,the value > of util and cap, which are parameters used in map_util_freq(), will be > cpu frequency, instead of cpu util and capactiy. > > For some 32bit architectures, the size of unsigned long is 32. When > calculating freq, there may be an overflow error in this expression:
Would it not be much better to fix that one case instead of adding extra instructions for everyone all the time?
