554 struct fast_pool {  struct
566 static void fast_mix(struct fast_pool *f)  in fast_mix()  argument
840 static DEFINE_PER_CPU(struct fast_pool, irq_randomness);
863 static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)  in get_reg()
877 	struct fast_pool	*fast_pool = this_cpu_ptr(&irq_randomness);  in add_interrupt_randomness()  local
887 		cycles = get_reg(fast_pool, regs);  in add_interrupt_randomness()
890 	fast_pool->pool[0] ^= cycles ^ j_high ^ irq;  in add_interrupt_randomness()
891 	fast_pool->pool[1] ^= now ^ c_high;  in add_interrupt_randomness()
893 	fast_pool->pool[2] ^= ip;  in add_interrupt_randomness()
894 	fast_pool->pool[3] ^= (sizeof(ip) > 4) ? ip >> 32 :  in add_interrupt_randomness()
895 		get_reg(fast_pool, regs);  in add_interrupt_randomness()
897 	fast_mix(fast_pool);  in add_interrupt_randomness()
900 	if ((fast_pool->count < 64) &&  in add_interrupt_randomness()
901 	    !time_after(now, fast_pool->last + HZ))  in add_interrupt_randomness()
908 	fast_pool->last = now;  in add_interrupt_randomness()
909 	__mix_pool_bytes(r, &fast_pool->pool, sizeof(fast_pool->pool));  in add_interrupt_randomness()
923 	fast_pool->count = 0;  in add_interrupt_randomness()