netdev - Re: [PATCH net-next 1/9] alx: refactor descriptor allocation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20161023.115012.1557996279582284252.davem@davemloft.net>
Date:   Sun, 23 Oct 2016 11:50:12 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     tobias.regnery@...il.com
Cc:     jcliburn@...il.com, chris.snook@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 1/9] alx: refactor descriptor allocation

From: Tobias Regnery <tobias.regnery@...il.com>
Date: Fri, 21 Oct 2016 12:49:44 +0200

> +	txq->tpd = alx->descmem.virt + offset;
> +	txq->tpd_dma = alx->descmem.dma + offset;

If all the crazy casting isn't necessary here...

> +	rxq->rrd = (void *)((u8 *)alx->descmem.virt + offset);
> +	rxq->rrd_dma = alx->descmem.dma + offset;
> +	offset += sizeof(struct alx_rrd) * alx->rx_ringsz;
> +
> +	rxq->rfd = (void *)((u8 *)alx->descmem.virt + offset);
> +	rxq->rfd_dma = alx->descmem.dma + offset;
> +	offset += sizeof(struct alx_rfd) * alx->rx_ringsz;

Then it certainly isn't necessary here either.

Void pointer arithmatic is very clearly defined as operating on byte
quantities, so the cast is not necessary for the arithmetic nor the
final pointer type.