taglinefilesource code
LATCH356arch/i386/kernel/irq.coutb_p(LATCH & 0xff , 0x40);  /* LSB */
LATCH357arch/i386/kernel/irq.coutb(LATCH >> 8 , 0x40);  /* MSB */
LATCH289arch/mips/kernel/irq.coutb_p(LATCH & 0xff , 0x40);  /* LSB */
LATCH290arch/mips/kernel/irq.coutb(LATCH >> 8 , 0x40);  /* MSB */
LATCH69include/linux/timex.h#define FINETUNE (((((LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
LATCH185kernel/time.cif (count > (LATCH - LATCH/100)) {
LATCH191kernel/time.ccount = ((LATCH-1) - count) * TICK_SIZE;
LATCH192kernel/time.ccount = (count + LATCH/2) / LATCH;