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 13:57:04 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Boaz Harrosh <bharrosh@...asas.com>, Julia Lawall <julia@...u.dk>,
	"David S. Miller" <davem@...emloft.net>,
	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 1:47 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
>
> And I misread that, assuming that it's just a wrapper around
> eth_mac_addr().  Only it isn't, because it passes eth_mac_addr() the
> MAC address's address directly (with ->sa_data).  But eth_mac_addr()
> expects a `struct sockaddr *'.
>
> And for some wtf reason, eth_mac_addr() passes that `struct
> sockaddr *' in a `void *', thus cunningly hiding the bug.
>
> Yeah, please revert it.

Well, the alternative would be to just fix uml_net_set_mac(). The code
before the patch was clearly crap too, so reverting may make it work,
but gets us back to a stupid situation with two different initializers
for one field.

So perhaps something like the attached patch would make it work, and
have the locking in place that apparently people think it should have?

Boaz?

                     Linus

View attachment "patch.diff" of type "text/x-patch" (730 bytes)