>>  struct libcfs_ioctl_hdr {
>>      __u32 ioc_len;
>> @@ -87,6 +88,13 @@ do {                                                  \
>>      data.ioc_hdr.ioc_len = sizeof(data);                    \
>>  } while (0)
>>  
>> +#define LIBCFS_IOC_INIT_V2(data, hdr)                       \
>> +do {                                                        \
>> +    memset(&(data), 0, sizeof(data));               \
>> +    (data).hdr.ioc_version = LIBCFS_IOCTL_VERSION2; \
>> +    (data).hdr.ioc_len = sizeof(data);              \
>> +} while (0)
>> +
>
>Do we really need this?

Would you be okay if this was a inline function? This is used by user land and 
kernel space code.


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