linux-kernel - Re: PowerPC: sleftests/powerpc fails to compile linux-next

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Message-ID: <b52834e9-6611-46a0-b036-42f6e9fa202c@linux.ibm.com>
Date: Fri, 7 Mar 2025 13:48:40 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
To: Madhavan Srinivasan <maddy@...ux.ibm.com>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, Stephen Rothwell <sfr@...b.auug.org.au>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: PowerPC: sleftests/powerpc fails to compile linux-next


On 07/03/25 12:32 pm, Madhavan Srinivasan wrote:
>
> On 3/6/25 10:30 PM, Venkat Rao Bagalkote wrote:
>> Greetings!!
>>
>> I see selftests/powerpc fails to compile on next-20250306.
>>
>> This error has been introduced in next-20250218. Make is successful on next-20250217.
>>
>>
>> Attached is the .config used.
>>
>>
>> If you fix this, please add below tag.
>>
>> Reported-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
>>
>>
>> Errors:
>>
>> make -C powerpc/
>> make: Entering directory '/root/venkat/linux-next/tools/testing/selftests/powerpc'
>> Makefile:60: warning: overriding recipe for target 'emit_tests'
>> ../lib.mk:182: warning: ignoring old recipe for target 'emit_tests'
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/alignment; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C alignment all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/benchmarks; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C benchmarks all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/cache_shape; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C cache_shape all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/copyloops; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C copyloops all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/dexcr; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C dexcr all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/dscr; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C dscr all
>> make[1]: Nothing to be done for 'all'.
>> BUILD_TARGET=/root/venkat/linux-next/tools/testing/selftests/powerpc/mm; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C mm all
>>    CC       pkey_exec_prot
>> In file included from pkey_exec_prot.c:18:
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h: In function ‘pkeys_unsupported’:
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h:96:34: error: ‘PKEY_UNRESTRICTED’ undeclared (first use in this function)
>>     96 |         pkey = sys_pkey_alloc(0, PKEY_UNRESTRICTED);
>>        |                                  ^~~~~~~~~~~~~~~~~
> Commit 6d61527d931ba ('mm/pkey: Add PKEY_UNRESTRICTED macro') added a macro PKEY_UNRESTRICTED to handle implicit literal
> value of 0x0 (which is "unrestricted"). belore patch add the same to powerpc/mm selftest.
>
> Can you try with this patch to check whether it fixes the build break for you
>
>
> diff --git a/tools/testing/selftests/powerpc/include/pkeys.h b/tools/testing/selftests/powerpc/include/pkeys.h
> index c6d4063dd4f6..d6deb6ffa1b9 100644
> --- a/tools/testing/selftests/powerpc/include/pkeys.h
> +++ b/tools/testing/selftests/powerpc/include/pkeys.h
> @@ -24,6 +24,9 @@
>   #undef PKEY_DISABLE_EXECUTE
>   #define PKEY_DISABLE_EXECUTE   0x4
>   
> +#undef PKEY_UNRESTRICTED
> +#define PKEY_UNRESTRICTED      0x0
> +
>   /* Older versions of libc do not define this */
>   #ifndef SEGV_PKUERR
>   #define SEGV_PKUERR    4
>
>
> Maddy

/Responding to all/

/
/

Tested with the above patch and it fixes the issue.

Please add below tag.

Tested-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>


Regards,

Venkat.

>
>
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h:96:34: note: each undeclared identifier is reported only once for each function it appears in
>> pkey_exec_prot.c: In function ‘segv_handler’:
>> pkey_exec_prot.c:75:53: error: ‘PKEY_UNRESTRICTED’ undeclared (first use in this function)
>>     75 |                         pkey_set_rights(fault_pkey, PKEY_UNRESTRICTED);
>>        | ^~~~~~~~~~~~~~~~~
>> make[1]: *** [../../lib.mk:222: /root/venkat/linux-next/tools/testing/selftests/powerpc/mm/pkey_exec_prot] Error 1
>>    CC       pkey_siginfo
>> In file included from pkey_siginfo.c:22:
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h: In function ‘pkeys_unsupported’:
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h:96:34: error: ‘PKEY_UNRESTRICTED’ undeclared (first use in this function)
>>     96 |         pkey = sys_pkey_alloc(0, PKEY_UNRESTRICTED);
>>        |                                  ^~~~~~~~~~~~~~~~~
>> /root/venkat/linux-next/tools/testing/selftests/powerpc/include/pkeys.h:96:34: note: each undeclared identifier is reported only once for each function it appears in
>> pkey_siginfo.c: In function ‘segv_handler’:
>> pkey_siginfo.c:86:39: error: ‘PKEY_UNRESTRICTED’ undeclared (first use in this function)
>>     86 |                 pkey_set_rights(pkey, PKEY_UNRESTRICTED);
>>        |                                       ^~~~~~~~~~~~~~~~~
>> make[1]: *** [../../lib.mk:222: /root/venkat/linux-next/tools/testing/selftests/powerpc/mm/pkey_siginfo] Error 1
>> make[1]: Target 'all' not remade because of errors.
>> make: *** [Makefile:40: mm] Error 2
>> make: Leaving directory '/root/venkat/linux-next/tools/testing/selftests/powerpc'
>>
>>
>> Regards,
>>
>> Venkat.