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

[Venkat Rao Bagalkote <venkat88@linux.ibm.com>]

On 27/03/25 8:36 pm, Madhavan Srinivasan wrote:
>
> 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
Above change fixes the issue. No warnings observed. Thank you!!
>
>>
>> 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@linux.ibm.com>
>>>>
>>>>
>>>> Regards,
>>>>
>>>> Venkat.