[LTP] [PATCH] syscalls/cma: fix the failure of compiling with O2 option

[Jason Xing]

On 2019/2/25 下午6:47, Jan Stancek wrote:
>
>
> ----- Original Message -----
>> This issue is triggered by the commit 9b02cd465f70 which I wrote. If
>> compile the process_vm_readv03.c with O2 option and run, it will return
>> TFAIL. By casting the int type to long type in the ltp_syscall calling
>> functions can we avoid this failure.
>>
>> Signed-off-by: Jason Xing <kerneljasonxing@linux.alibaba.com>
>> ---
>>  testcases/kernel/syscalls/cma/process_vm_readv03.c | 8 ++++----
>
> What about other tests that were changed by commit 9b02cd465f70 ?
>

After testing all the process_vm_* cases with O0 and O2 options, we find 
that only process_vm_readv03 encounters this problem.

>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/testcases/kernel/syscalls/cma/process_vm_readv03.c
>> b/testcases/kernel/syscalls/cma/process_vm_readv03.c
>> index 45f7c92..e15ffee 100644
>> --- a/testcases/kernel/syscalls/cma/process_vm_readv03.c
>> +++ b/testcases/kernel/syscalls/cma/process_vm_readv03.c
>> @@ -181,7 +181,7 @@ static long *fetch_remote_addrs(void)
>>  	remote.iov_len = len;
>>
>>  	TEST(ltp_syscall(__NR_process_vm_readv, pids[0], &local,
>> -			 1, &remote, 1, 0));
>> +			 1L, &remote, 1L, 0L));
>>  	if (TEST_RETURN != len)
>>  		tst_brkm(TFAIL | TERRNO, tst_exit, "process_vm_readv");
>>
>> @@ -213,8 +213,8 @@ static void child_invoke(int *bufsz_arr)
>>  	tst_resm(TINFO, "child 1: %d local iovecs initialized.",
>>  		 NUM_LOCAL_VECS);
>>
>> -	TEST(ltp_syscall(__NR_process_vm_readv, pids[0], local, NUM_LOCAL_VECS,
>> -				   remote, nr_iovecs, 0));
>> +	TEST(ltp_syscall(__NR_process_vm_readv, pids[0], local,
>> (long)NUM_LOCAL_VECS,
>> +				   remote, (long)nr_iovecs, 0L));
>>  	if (TEST_RETURN != bufsz)
>>  		tst_brkm(TBROK | TERRNO, tst_exit, "process_vm_readv");
>>
>> @@ -248,7 +248,7 @@ static void setup(void)
>>  	tst_require_root();
>>
>>  	/* Just a sanity check of the existence of syscall */
>> -	ltp_syscall(__NR_process_vm_readv, getpid(), NULL, 0, NULL, 0, 0);
>> +	ltp_syscall(__NR_process_vm_readv, getpid(), NULL, 0L, NULL, 0L, 0L);
>>
>>  	nr_iovecs = nflag ? SAFE_STRTOL(NULL, nr_opt, 1, IOV_MAX) : 10;
>>  	bufsz = sflag ? SAFE_STRTOL(NULL, sz_opt, NUM_LOCAL_VECS, LONG_MAX)
>> --
>> 1.8.3.1
>>
>>