DAOS-14725 client: redefine daos_event_t to avoid compatibility issues

Reuse the space hole (for 64-bits alignment) in daos_event_t structure
as new filed "ev_abort" that is only used for DAOS test internally.

Signed-off-by: Fan Yong <[email protected]>

src/include/daos_types.h

@@ -150,14 +150,14 @@ typedef d_iov_t daos_key_t;
 typedef struct daos_event {
 	/** return code of non-blocking operation */
 	int			ev_error;
+	/** Abort the task(s) related with the event queue. Only used for DAOS test internally. */
+	uint32_t		ev_abort:1;
 	/** Internal use - 152 + 8 bytes pad for pthread_mutex_t size difference on __aarch64__ */
 	struct {
 		uint64_t	space[20];
 	}			ev_private;
 	/** Used for debugging */
-	uint32_t		ev_debug;
-	/** Abort the task(s) related with the event queue. */
-	uint32_t		ev_abort:1;
+	uint64_t		ev_debug;
 } daos_event_t;
 
 /** Wait for completion event forever */