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From: Harald Arnesen <skogtun.harald@gmail.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Harald Arnesen <skogtun.linux@gmail.com>,
	FUJITA Tomonori <tomof@acm.org>,
	akpm@linux-foundation.org, matthew@wil.cx,
	linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
	fujita.tomonori@lab.ntt.co.jp
Subject: Re: Latest git oopses during boot
Date: Thu, 07 Feb 2008 22:39:45 +0100	[thread overview]
Message-ID: <87hcgkzbry.fsf@basilikum.skogtun.org> (raw)
In-Reply-To: <alpine.LFD.1.00.0802071304420.2896@woody.linux-foundation.org> (Linus Torvalds's message of "Thu, 7 Feb 2008 13:14:25 -0800 (PST)")

Linus Torvalds <torvalds@linux-foundation.org> writes:

> On Thu, 7 Feb 2008, Harald Arnesen wrote:
>> >
>> > Can you do a
>> >
>> >         make drivers/scsi/advansys.lst
>> >
>> > and see what it should be?
>> 
>> Anyway, here it is, as an attachment.
>
> Ok, I was wrong. The code really *does* compile to that insane
>
> 	a3 14 00 00 00          mov    %eax,0x14
>
> by your compiler.
>
> That's the
>
> 	asc_dvc_varp->overrun_buf = kzalloc(ASC_OVERRUN_BSIZE, GFP_KERNEL);
>
> thing, and gcc seems to have decided that it can statically prove that 
> asc_dvc_varp is NULL.
>
> Quite frankly, I don't see that being true. But you have some patches in 
> your tree that I haven't followed, so.. Are you sure the patches applied 
> to the right spot? The patch I saw added that kzalloc() to the _end_ of 
> the function (long after asc_dvc_varp was initialized), maybe that one got 
> mis-applied?
>
> Or maybe your compiler version is simply totally broken.
>
> 			Linus

I'll try applying the patch to a freshly downloaded git-tree.

Shall I try another compiler? I have at least these two:

gcc version 3.4.6 (Ubuntu 3.4.6-6ubuntu2)
gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)

in addition to the self-compiled 4.2.3 I used for the tests.
-- 
Hilsen Harald.

  reply	other threads:[~2008-02-07 21:41 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-06 16:32 Harald Arnesen
2008-02-06 22:47 ` Andrew Morton
     [not found]   ` <8120cfd40802070144l79830c2cs6329c302697ecc8b@mail.gmail.com>
2008-02-07 10:02     ` Andrew Morton
2008-02-07 11:14       ` Harald Arnesen
2008-02-07 11:16         ` Christoph Hellwig
2008-02-07 14:32         ` FUJITA Tomonori
     [not found]           ` <8120cfd40802070933r42a98537v78feb7ee8e748a94@mail.gmail.com>
2008-02-07 18:18             ` Linus Torvalds
     [not found]               ` <8120cfd40802071248x20ed938dh52cd9e314219613b@mail.gmail.com>
2008-02-07 21:14                 ` Linus Torvalds
2008-02-07 21:39                   ` Harald Arnesen [this message]
2008-02-07 22:12                     ` Linus Torvalds
2008-02-07 22:24                       ` Harald Arnesen
2008-02-08  0:10                         ` FUJITA Tomonori
2008-02-06 23:06 ` Linus Torvalds

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