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Dblk-iocost.c1137 u64 active_sum = READ_ONCE(parent->child_active_sum); in current_hweight() local
1143 if (!active_sum || !inuse_sum) in current_hweight()
1146 active_sum = max_t(u64, active, active_sum); in current_hweight()
1147 hwa = div64_u64((u64)hwa * active, active_sum); in current_hweight()