x86: cleanup div_sc() usage

Remove the magic number in the third argment of div_sc().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic_32.c

@@ -451,7 +451,8 @@ void __init setup_boot_APIC_clock(void)
 	}
 
 	/* Calculate the scaled math multiplication factor */
-	lapic_clockevent.mult = div_sc(delta, TICK_NSEC * LAPIC_CAL_LOOPS, 32);
+	lapic_clockevent.mult = div_sc(delta, TICK_NSEC * LAPIC_CAL_LOOPS,
+				       lapic_clockevent.shift);
 	lapic_clockevent.max_delta_ns =
 		clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
 	lapic_clockevent.min_delta_ns =

arch/x86/kernel/apic_64.c

@@ -360,7 +360,8 @@ static void __init calibrate_APIC_clock(void)
 		result / 1000 / 1000, result / 1000 % 1000);
 
 	/* Calculate the scaled math multiplication factor */
-	lapic_clockevent.mult = div_sc(result, NSEC_PER_SEC, 32);
+	lapic_clockevent.mult = div_sc(result, NSEC_PER_SEC,
+				       lapic_clockevent.shift);
 	lapic_clockevent.max_delta_ns =
 		clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
 	lapic_clockevent.min_delta_ns =

arch/x86/kernel/hpet.c

@@ -218,7 +218,7 @@ static void hpet_legacy_clockevent_register(void)
 	hpet_freq = 1000000000000000ULL;
 	do_div(hpet_freq, hpet_period);
 	hpet_clockevent.mult = div_sc((unsigned long) hpet_freq,
-				      NSEC_PER_SEC, 32);
+				      NSEC_PER_SEC, hpet_clockevent.shift);
 	/* Calculate the min / max delta */
 	hpet_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF,
 							   &hpet_clockevent);

arch/x86/kernel/i8253.c

@@ -115,7 +115,8 @@ void __init setup_pit_timer(void)
 	 * IO_APIC has been initialized.
 	 */
 	pit_clockevent.cpumask = cpumask_of_cpu(smp_processor_id());
-	pit_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, 32);
+	pit_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC,
+				     pit_clockevent.shift);
 	pit_clockevent.max_delta_ns =
 		clockevent_delta2ns(0x7FFF, &pit_clockevent);
 	pit_clockevent.min_delta_ns =

arch/x86/kernel/mfgpt_32.c

@@ -364,7 +364,8 @@ int __init mfgpt_timer_setup(void)
 	geode_mfgpt_write(mfgpt_event_clock, MFGPT_REG_SETUP, val);
 
 	/* Set up the clock event */
-	mfgpt_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC, 32);
+	mfgpt_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC,
+				       mfgpt_clockevent.shift);
 	mfgpt_clockevent.min_delta_ns = clockevent_delta2ns(0xF,
 			&mfgpt_clockevent);
 	mfgpt_clockevent.max_delta_ns = clockevent_delta2ns(0xFFFE,