Re: [PATCH] block/keyslot-manager: prevent crash when num_slots=1

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On Wed, Nov 11, 2020 at 09:45:38AM +0000, Satya Tangirala wrote:
> On Wed, Nov 11, 2020 at 09:23:05AM +0000, Christoph Hellwig wrote:
> > On Tue, Nov 10, 2020 at 06:14:27PM -0800, Eric Biggers wrote:
> > > +	 * hash_ptr() assumes bits != 0, so ensure the hash table has at least 2
> > > +	 * buckets.  This only makes a difference when there is only 1 keyslot.
> > > +	 */
> > > +	slot_hashtable_size = max(slot_hashtable_size, 2U);
> > 
> > shouldn't this be a min()?
> I think it should be max(), since we want whichever is larger between 2
> and the original slot_hashtable_size :)

max() is correct.  I could just open-code it, if that would make it clearer:

	/*
	 * hash_ptr() assumes bits != 0, so ensure the hash table has at least 2
	 * buckets.  This only makes a difference when there is only 1 keyslot.
	 */
	if (slot_hashtable_size < 2)
		slot_hashtable_size = 2;



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