Re: [PATCH] rseq/selftests: Fix MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ build error under other arch.

[Shuah Khan <skhan@linuxfoundation.org>]

On 11/25/20 9:10 AM, Mathieu Desnoyers wrote:
> ----- On Nov 24, 2020, at 11:04 PM, Xingxing Su suxingxing@loongson.cn wrote:
> 
>> Except arch x86, the function rseq_offset_deref_addv is not defined.
>> The function test_membarrier_manager_thread call rseq_offset_deref_addv
>> produces a build error.
>>
>> The RSEQ_ARCH_HAS_OFFSET_DEREF_ADD should contain all the code
>> for the MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ.
>> If the other Arch implements this feature,
>> defined RSEQ_ARCH_HAS_OFFSET_DEREF_ADD in the header file
>> to ensure that this feature is available.
>>
>> Following build errors:
>>
>> param_test.c: In function ‘test_membarrier_worker_thread’:
>> param_test.c:1164:10: warning: implicit declaration of function
>> ‘rseq_offset_deref_addv’
>>     ret = rseq_offset_deref_addv(&args->percpu_list_ptr,
>>           ^~~~~~~~~~~~~~~~~~~~~~
>> /tmp/ccMj9yHJ.o: In function `test_membarrier_worker_thread':
>> param_test.c:1164: undefined reference to `rseq_offset_deref_addv'
>> param_test.c:1164: undefined reference to `rseq_offset_deref_addv'
>> collect2: error: ld returned 1 exit status
>> make: *** [/selftests/rseq/param_test_benchmark] Error 1
>>
>> Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
> 
> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> 
> Shuah, can you pick up this fix please ?
> 

Applying for 5.11-rc1.

thanks,
-- Shuah