[PATCH v2] powerpc/boot: Fix dash warning

[Venkat Rao Bagalkote]

On 23/04/25 2:23 pm, Stephen Rothwell wrote:
> Hi Madhavan,
>
> On Wed, 23 Apr 2025 13:51:54 +0530 Madhavan Srinivasan <maddy at linux.ibm.com> wrote:
>> Commit b2accfe7ca5b '("powerpc/boot: Check for ld-option support")' suppressed
>> linker warnings, but the expressed used did not go well with POSIX shell (dash)
>> resulting with this warning
>>
>> arch/powerpc/boot/wrapper: 237: [: 0: unexpected operator
>> ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
>>
>> Fix the check to handle the reported warning. Patch also fixes
>> couple of shellcheck reported errors for the same line.
>>
>> In arch/powerpc/boot/wrapper line 237:
>> if [ $(${CROSS}ld -v --no-warn-rwx-segments &>/dev/null; echo $?) -eq 0 ]; then
>>       ^-- SC2046 (warning): Quote this to prevent word splitting.
>>         ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.
>>                                              ^---------^ SC3020 (warning): In POSIX sh, &> is undefined.
>>
>> Fixes: b2accfe7ca5b '("powerpc/boot: Check for ld-option support")'
>> Reported-by: Stephen Rothwell <sfr at canb.auug.org.au>
>> Suggested-by: Stephen Rothwell <sfr at canb.auug.org.au>
>> Signed-off-by: Madhavan Srinivasan <maddy at linux.ibm.com>
>> ---
>> Changelog v1:
>> - modified the check to use the command exit
>>    state instead explicit checking with exit code
>>    
>> Patch applies on top of powerpc/fixes
>>
>>   arch/powerpc/boot/wrapper | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
>> index 267ca6d4d9b3..3d8dc822282a 100755
>> --- a/arch/powerpc/boot/wrapper
>> +++ b/arch/powerpc/boot/wrapper
>> @@ -234,7 +234,7 @@ fi
>>   
>>   # suppress some warnings in recent ld versions
>>   nowarn="-z noexecstack"
>> -if [ $(${CROSS}ld -v --no-warn-rwx-segments &>/dev/null; echo $?) -eq 0 ]; then
>> +if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
>>   	nowarn="$nowarn --no-warn-rwx-segments"
>>   fi
> Looks good to me.
>
> Reviewed-by: Stephen Rothwell <sfr at canb.auug.org.au>
>
Tested this patch by applying on base: 
b2accfe7ca5bc9f9af28e603b79bdd5ad8df5c0b and it fixes the issue. Hence,

Tested-by: Venkat Rao Bagalkote <venkat88 at linux.ibm.com>


Regards,

Venkat.