linux-kernel - Re: [BUG] linux-next: Tree for August 26

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Date:	Thu, 28 Aug 2008 15:55:07 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Arjan van de Ven <arjan@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	linuxppc-dev@...abs.org, linux-next@...r.kernel.org, mingo@...e.hu
Subject: Re: [BUG] linux-next: Tree for August 26 - Badness at
	kernel/notifier.c:25

On Thu, 2008-08-28 at 15:23 +0100, David Woodhouse wrote:
> On Thu, 2008-08-28 at 00:38 +1000, Stephen Rothwell wrote:
> > Hi Arjan,
> > 
> > On Thu, 28 Aug 2008 00:33:08 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> > >
> > > The original reported trace was during setup_system which is very early in
> > > the boot.
> > 
> > But, of course, that version didn't have the necessary extra dereference
> > of the function address ...
> > 
> > And the later debug patch did not check the address at register time,
> > only at notify time.
> > 
> > The later trace also looks to be early in the boot.
> 
> It's isa_bridge_notify(), which is neither within _[se]text nor
> _[se]inittext, so the core_kernel_text() function disavows it.
> 
> Where are __devinit functions supposed to end up?

The TEXT_TEXT macro defined in <asm-generic/vmlinux.lds.h> should get
this right... but we don't use it. Is there any particular reason for
that, or should we....

Signed-off-by: David Woodhouse <David.Woodhouse@...el.com>

--- linux-2.6.26.ppc64/arch/powerpc/kernel/vmlinux.lds.S~	2008-07-13 22:51:29.000000000 +0100
+++ linux-2.6.26.ppc64/arch/powerpc/kernel/vmlinux.lds.S	2008-08-28 15:39:14.000000000 +0100
@@ -35,10 +35,11 @@ SECTIONS
 		ALIGN_FUNCTION();
 		*(.text.head)
 		_text = .;
-		*(.text .fixup .text.init.refok .exit.text.refok)
+		TEXT_TEXT
 		SCHED_TEXT
 		LOCK_TEXT
 		KPROBES_TEXT
+		*(.fixup)
 
 #ifdef CONFIG_PPC32
 		*(.got1)

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation



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