UCLAMP_PERCENT_SHIFT
#define UCLAMP_PERCENT_SCALE (100 * POW10(UCLAMP_PERCENT_SHIFT))
req.ret = cgroup_parse_float(buf, UCLAMP_PERCENT_SHIFT,
percent = div_u64_rem(percent, POW10(UCLAMP_PERCENT_SHIFT), &rem);
seq_printf(sf, "%llu.%0*u\n", percent, UCLAMP_PERCENT_SHIFT, rem);