mm: exit.c reorder wait_opts to remove padding on 64 bit builds

Reorder struct wait_opts to remove 8 bytes of alignment padding on 64 bit
builds.

Signed-off-by: Richard Kennedy <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Roland McGrath <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

kernel/exit.c

@@ -1082,8 +1082,8 @@ SYSCALL_DEFINE1(exit_group, int, error_code)
 
 struct wait_opts {
 	enum pid_type		wo_type;
-	struct pid		*wo_pid;
 	int			wo_flags;
+	struct pid		*wo_pid;
 
 	struct siginfo __user	*wo_info;
 	int __user		*wo_stat;