linux-kernel - Re: [main-line]Build warnings on PowerPC system

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Message-ID: <38653c58-a5c4-496f-9b52-e7bc3e447423@linux.ibm.com>
Date: Thu, 27 Mar 2025 20:36:55 +0530
From: Madhavan Srinivasan <maddy@...ux.ibm.com>
To: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [main-line]Build warnings on PowerPC system



On 3/27/25 7:31 PM, Venkat Rao Bagalkote wrote:
> 
> On 27/03/25 7:22 pm, Madhavan Srinivasan wrote:
>>
>> On 3/27/25 12:33 AM, Venkat Rao Bagalkote wrote:
>>> Greetings!!!
>>>
>>> I see below build warnings while compiling mainline kernel on IBM Power9 system.
>>>
>>> Repo Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
>>>
>>> Head Commit: f6e0150b2003fb2b9265028a618aa1732b3edc8f
>>>
>>> Attached is the .config.
>>>
>>> Machine: IBM Power9
>>>
>>> gcc version 11.5.0
>> What is the ld version in your system.
> 
> Please find the ld version below.
> 
> GNU ld version 2.35.2-59.el9


ah ok that explains. Kindly can you try with this patch and let us know whether 
this fixes the warning in your setup


diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 1db60fe13802..09ceb5a42d81 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -235,7 +235,7 @@ fi
 # suppress some warnings in recent ld versions
 nowarn="-z noexecstack"
 if ! ld_is_lld; then
-       if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
+       if [ "$LD_VERSION" -ge "$(echo 2.35 | ld_version)" ]; then
                nowarn="$nowarn --no-warn-rwx-segments"
        fi
 fi


> 
> 
> Regards,
> 
> Venkat.
> 
>>
>> Reason for asking is that currently with
>>
>> commit  579aee9fc594a ("powerpc: suppress some linker warnings in recent linker versions")
>>
>> ld version greater than >2.39, this warning is being suppressed.
>>
>> Maddy
>>
>>>
>>> Warnings:
>>>
>>> ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
>>> ld: warning: arch/powerpc/boot/zImage.pseries has a LOAD segment with RWX permissions
>>>
>>>
>>> If you happen to fix this, please add below tag.
>>>
>>>
>>> Reported-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
>>>
>>>
>>> Regards,
>>>
>>> Venkat.