linux-kernel - Re: 2.6.22-rc6-mm1: Xen: WARNING: Absolute relocations present

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Message-ID: <4687D744.6000103@goop.org>
Date:	Sun, 01 Jul 2007 09:33:08 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Andi Kleen <ak@...e.de>, chrisw@...s-sol.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	Vivek Goyal <vgoyal@...ibm.com>
Subject: Re: 2.6.22-rc6-mm1: Xen: WARNING: Absolute relocations present

Eric W. Biederman wrote:
> Jeremy Fitzhardinge <jeremy@...p.org> writes:
>
>   
>> Adrian Bunk wrote:
>>     
>>> <--  snip  -->
>>>
>>> ...
>>>   RELOCS  arch/i386/boot/compressed/vmlinux.relocs
>>> WARNING: Absolute relocations present
>>> Offset     Info     Type     Sym.Value Sym.Name
>>> c0101f80 020c6501   R_386_32 00000000  xen_irq_disable_direct_reloc
>>> c0101f9a 0221ea01   R_386_32 00000000  xen_save_fl_direct_reloc
>>> ...
>>>
>>> <--  snip  -->
>>>
>>>       
>> Hm.  Those are false alarms.  I guess I could do something to hide them, but
>> there's nothing inherently wrong with correctly used abs symbols.  Is there
>> someway to whitelist them?
>>     
>
> Yes.  Just add them to arch/i386/boot/compressed/relocs.c safe_abs_syms.
>   

OK, how's this?

Subject: xen: suppress abs symbol warnings for unused reloc pointers

The Xen code generates some abs symbols which are OK from a relocation
perspective.

Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
Cc: Adrian Bunk <bunk@...sta.de>

---
 arch/i386/boot/compressed/relocs.c |    2 ++
 1 file changed, 2 insertions(+)

===================================================================
--- a/arch/i386/boot/compressed/relocs.c
+++ b/arch/i386/boot/compressed/relocs.c
@@ -31,6 +31,8 @@ static const char* safe_abs_relocs[] = {
 		"__kernel_rt_sigreturn",
 		"__kernel_sigreturn",
 		"SYSENTER_RETURN",
+		"xen_irq_disable_direct_reloc",
+		"xen_save_fl_direct_reloc",
 };
 
 static int is_safe_abs_reloc(const char* sym_name)


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