Function vm_radix_trimkey

freebsd/vm/vm_radix.c:184–195

Trims the key after the specified level. */

/* Trims the key after the specified level. */
static __inline vm_pindex_t
vm_radix_trimkey(vm_pindex_t index, uint16_t level)
{
	vm_pindex_t ret;

	ret = index;
	if (level > 0) {
		ret >>= level * VM_RADIX_WIDTH;
		ret <<= level * VM_RADIX_WIDTH;
	}
	return (ret);
}

/*
 * Fetch a node pointer from a slot in another node.