netdev - Re: [PATCH net-next 3/3] packet: use percpu mmap tx frame pending refcount

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Date:	Tue, 14 Jan 2014 17:16:34 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dborkman@...hat.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] packet: use percpu mmap tx frame pending
 refcount

From: Daniel Borkmann <dborkman@...hat.com>
Date: Sun, 12 Jan 2014 17:22:48 +0100

> +static int packet_read_pending(const struct packet_ring_buffer *rb)
> +{
> +	int i, refcnt = 0;
> +
> +	/* We don't use pending refcount in rx_ring. */
> +	if (rb->pending_refcnt == NULL)
> +		return 0;
> +
> +	for_each_possible_cpu(i)
> +		refcnt += *per_cpu_ptr(rb->pending_refcnt, i);
> +
> +	return refcnt;
> +}

David Laight stated that this works properly only if all the arithmetic
is unsigned.

Therefore, maybe use "unsigned int" for refcnt here?

Can you respin this series with that fixed?

Thanks.

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