[dm-devel] How to understand dm-writecache/memory_entry

[shenghui]

Hi Mikulas,

Sorry to trouble you again.

I'm reading the source code of dm-writecache, and noticed:
-----------------------------------------------------
static struct wc_memory_entry *memory_entry(struct dm_writecache *wc, struct wc_entry *e)
{
	if (is_power_of_2(sizeof(struct wc_entry)) && 0)    // why this?
		return &sb(wc)->entries[e - wc->entries];
	else
		return &sb(wc)->entries[e->index];
}

Seems there is something wrong with the if condition, right?

Thanks,
shenghui