On Tuesday 05 May 2015 14:09:14 Sandy Sun wrote: > Hi Arnd, > > If user space uses union semun to define.It will use semid_ds not > semid64_ds. > > I used LTP test case semctl01 IPC_STAT to do the test on 64 bit > system.According to the test results: > > Before the change, semun uses semid_ds, the field of sem_nsems reporting of > semaphore STAT info is incorrect: > > semctl01 1 TFAIL : semaphore STAT info is incorrect > semctl01 2 TFAIL : semaphore mode info is incorrect > > After this change, the return value is correct: > semctl01 1 TPASS : buf.sem_nsems and buf.sem_perm.mode are correct > semctl01 2 TPASS : buf.sem_perm.mode is correct I don't understand: semctl01 does not reference 'union semun64'. How does this change make a difference, and why would that difference be limited to 64-bit systems? Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
