netdev - Re: [PATCH] net/rds: fix unaligned memory access

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Message-Id: <20150430.114403.2012017340124788492.davem@davemloft.net>
Date:	Thu, 30 Apr 2015 11:44:03 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	david.ahern@...cle.com
Cc:	rds-devel@....oracle.com, netdev@...r.kernel.org,
	shamir.rabinovitch@...cle.com
Subject: Re: [PATCH] net/rds: fix unaligned memory access

From: David Ahern <david.ahern@...cle.com>
Date: Thu, 30 Apr 2015 10:27:53 -0400

> @@ -183,8 +183,17 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
>  
>  	/* If the peer gave us the last packet it saw, process this as if
>  	 * we had received a regular ACK. */
> -	if (dp && dp->dp_ack_seq)
> -		rds_send_drop_acked(conn, be64_to_cpu(dp->dp_ack_seq), NULL);
> +	if (dp) {
> +		/* dp structure start is not guaranteed to be 8 bytes aligned
> +		 * so on SPARC we get trap for nu-aligned access. we solve
> +		 * this by using the macros for unaligned memory access
> +		 */

"nu-aligned" is misspelled, and Mentioning sparc specifically is completely
inappropriate because this is not a sparc specific problem.
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