Function l2arc_range_check_overlap

freebsd/contrib/openzfs/module/zfs/arc.c:10628–10637

* Checks whether a given L2ARC device address sits in a time-sequential * range. The trick here is that the L2ARC is a rotary buffer, so we can't * just do a range comparison, we need to handle the situation in which the * range wraps around the end of the L2ARC device. Arguments: * bottom -- Lower end of the range to check (written to earlier). * top -- Upper end of the range to check (wr

 *	top == bottom : Just a single address comparison.
 */
boolean_t
l2arc_range_check_overlap(uint64_t bottom, uint64_t top, uint64_t check)
{
	if (bottom < top)
		return (bottom <= check && check <= top);
	else if (bottom > top)
		return (check <= top || bottom <= check);
	else
		return (check == top);
}

EXPORT_SYMBOL(arc_buf_size);
EXPORT_SYMBOL(arc_write);