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From: Boaz Harrosh <bharrosh@panasas.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Julia Lawall <julia@diku.dk>,
	"David S. Miller" <davem@davemloft.net>,
	uml-devel <user-mode-linux-devel@lists.sourceforge.net>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: {painfully BISECTED} Please revert f25c80a4b2: arch/um/drivers: remove duplicate structure field initialization
Date: Wed, 29 Sep 2010 10:41:31 +0200	[thread overview]
Message-ID: <4CA2FBBB.3040004@panasas.com> (raw)
In-Reply-To: <AANLkTi=E7+CpJZE3XC7O1LvJu6LWfmvSxonskH4CYg25@mail.gmail.com>

On 09/28/2010 10:57 PM, Linus Torvalds wrote:
> On Tue, Sep 28, 2010 at 1:47 PM, Andrew Morton
> <akpm@linux-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?
> 

OK I get the picture. We should attempt a proper fixing. Well since
I get to test it, then I get to fix it as well, right ;-)?

With this I'm now back to my usual: boots fine but half of the times
not halting. But I think that's a Fedora12 problem with interaction
with uml. (Which I do not have time to investigate)

>                      Linus

Thanks, have a good day
Boaz

  parent reply	other threads:[~2010-09-29  8:41 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-27 13:17 {painfully BISECTED} Please revert f25c80a4b2: arch/um/drivers: remove duplicate structure field initialization Boaz Harrosh
2010-09-27 14:06 ` Phil Turmel
2010-09-28 20:24 ` [uml-devel] " Linus Torvalds
2010-09-28 20:24   ` Linus Torvalds
2010-09-28 20:47   ` [uml-devel] " Andrew Morton
2010-09-28 20:47     ` Andrew Morton
2010-09-28 20:51     ` David Miller
2010-09-28 20:57     ` [uml-devel] " Linus Torvalds
2010-09-28 20:57       ` Linus Torvalds
2010-09-28 21:00       ` [uml-devel] " David Miller
2010-09-28 21:00         ` David Miller
2010-09-28 21:08         ` Linus Torvalds
2010-09-29  8:34       ` [uml-devel] [PATCH] um: Proper Fix for f25c80a4: " Boaz Harrosh
2010-09-29  8:34         ` Boaz Harrosh
2010-09-29 15:05         ` Linus Torvalds
2010-09-30  2:28           ` [uml-devel] " David Miller
2010-09-30  2:28             ` David Miller
2010-09-29  8:41       ` Boaz Harrosh [this message]
2010-09-29 15:01         ` {painfully BISECTED} Please revert f25c80a4b2: arch/um/drivers: " Linus Torvalds
2010-09-30  2:27           ` David Miller
2010-09-28 21:11   ` Al Viro
2010-09-28 21:24     ` [uml-devel] " Al Viro
2010-09-28 21:24       ` Al Viro
2010-09-28 21:42       ` David Miller
2010-09-28 21:51         ` [uml-devel] " Al Viro
2010-09-28 21:51           ` Al Viro
2010-09-29 17:19           ` [uml-devel] " Renzo Davoli
2011-01-26 16:32   ` {painfullyBISECTED} " Emil Langrock

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