linux-kernel - Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

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Date:   Mon, 16 Oct 2017 22:48:11 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Paul Turner <pjt@...gle.com>, Andrew Hunter <ahh@...gle.com>,
        Andy Lutomirski <luto@...capital.net>,
        Dave Watson <davejwatson@...com>,
        Josh Triplett <josh@...htriplett.org>,
        Will Deacon <will.deacon@....com>,
        linux-kernel@...r.kernel.org,
        Russell King <linux@....linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andi Kleen <andi@...stfloor.org>, Chris Lameter <cl@...ux.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ben Maurer <bmaurer@...com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        linux-api@...r.kernel.org
Subject: Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

Boqun Feng <boqun.feng@...il.com> writes:
> On Mon, Oct 16, 2017 at 02:00:33PM +1100, Michael Ellerman wrote:
>
>> I'm having trouble testing these, I get:
...
>> 
>>   ~/linus/tools/testing/selftests/rseq$ ./basic_percpu_ops_test
>>   ./basic_percpu_ops_test: error while loading shared libraries: R_PPC64_ADDR16_HI re10d8f10a0 for symbol `' out of range
>>   ~/linus/tools/testing/selftests/rseq$ ./param_test
>>   ./param_test: error while loading shared libraries: R_PPC64_ADDR16_HI re136251b48 for symbol `' out of range
>> 
>
> I think this one is due to the same reason as:
>
> 	7998eb3dc700 ("powerpc: Fix 64 bit builds with binutils 2.24")
>
> I have made the fix before, but seems forgot to send it to Mathieu...
>
> so would this help?
> 	
> diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
> index bc78b4fd72b1..39cbabe89b0e 100644
> --- a/tools/testing/selftests/rseq/rseq-ppc.h
> +++ b/tools/testing/selftests/rseq/rseq-ppc.h
> @@ -74,7 +74,7 @@ do {									\
>  		"lis %%r17, (3b)@highest\n\t" \
>  		"ori %%r17, %%r17, (3b)@higher\n\t" \
>  		"rldicr %%r17, %%r17, 32, 31\n\t" \
> -		"oris %%r17, %%r17, (3b)@h\n\t" \
> +		"oris %%r17, %%r17, (3b)@high\n\t" \
>  		"ori %%r17, %%r17, (3b)@l\n\t" \
>  		"std %%r17, 0(%[rseq_cs])\n\t" \
>  		RSEQ_INJECT_ASM(2) \

Yes, that fixes it thanks!

cheers