linux-kernel - Re: {painfully BISECTED} Please revert f25c80a4b2: arch/um/drivers: remove duplicate structure field initialization

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Date:	Tue, 28 Sep 2010 22:24:17 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Boaz Harrosh <bharrosh@...asas.com>, Julia Lawall <julia@...u.dk>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: {painfully BISECTED} Please revert f25c80a4b2: arch/um/drivers:
 remove duplicate structure field initialization

On Tue, Sep 28, 2010 at 10:11:06PM +0100, Al Viro wrote:

> IOW, it _must_ use the last one in such cases.
> 
> As for the driver, I smell an interface change (in eth_mac_addr() arguments)
> that has been missed...  FWIW, grep through the tree shows one more instance
> of eth_mac_addr() called with such argument and it's also in net_kern.c; there
> we simply want memcpy() instead, since device is definitely not running at
> that point and we'd done the validity checks earlier.
> 
> Not sure if we need lp->lock around that eth_mac_addr() call - not familiar
> with the driver in question.  If we don't, we should switch to eth_mac_addr
> for the method, indeed...

FWIW, after looking at that code... I don't think we need lp->lock there,
but I really wonder if we need to update lp->mac as well, or, perhaps simply
remove it completely.  Who maintains these drivers?  It's not just
net_kern/net_user; there's a bunch of subdrivers for that sucker...
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