524 	u64 delay, diff, mult;  in ionic_lif_alloc_phc()  local
567 		diff = U64_MAX / phc->cc.mult / 2;  in ionic_lif_alloc_phc()
570 		diff = (u64)IONIC_PHC_UPDATE_NS << (phc->cc.shift + 2);  in ionic_lif_alloc_phc()
571 		diff = DIV_ROUND_UP(diff, phc->cc.mult);  in ionic_lif_alloc_phc()
575 	diff |= diff >> 1;  in ionic_lif_alloc_phc()
576 	diff |= diff >> 2;  in ionic_lif_alloc_phc()
577 	diff |= diff >> 4;  in ionic_lif_alloc_phc()
578 	diff |= diff >> 8;  in ionic_lif_alloc_phc()
579 	diff |= diff >> 16;  in ionic_lif_alloc_phc()
580 	diff |= diff >> 32;  in ionic_lif_alloc_phc()
583 	diff &= phc->cc.mask;  in ionic_lif_alloc_phc()
585 	/* the wrap period is now defined by diff  in ionic_lif_alloc_phc()
588 	 * should not see a difference of more than +/- diff/4.  in ionic_lif_alloc_phc()
590 	 * this is sufficient not see a difference of more than +/- diff/2, as  in ionic_lif_alloc_phc()
595 	 *  - do not overflow 64 bits: max_mult * (diff / 2)  in ionic_lif_alloc_phc()
602 	mult = U64_MAX / 2 / max(diff / 2, SCALED_PPM);  in ionic_lif_alloc_phc()
622 		      cyclecounter_cyc2ns(&phc->cc, diff / 4, 0, &frac));  in ionic_lif_alloc_phc()