casaroli commented on code in PR #20827:
URL: https://github.com/apache/nuttx/pull/20827#discussion_r4392210342


##########
include/nuttx/sched.h:
##########
@@ -461,7 +461,9 @@ struct task_group_s
   pid_t tg_pid;                     /* The ID of the task within the group     
 */
   pid_t tg_ppid;                    /* This is the ID of the parent thread     
 */
   uint8_t tg_flags;                 /* See GROUP_FLAG_* definitions            
 */
+#ifdef CONFIG_SCHED_CAPABILITIES

Review Comment:
   This does not make the struct smaller: without `tg_caps` the padding before 
`mode_t tg_umask` grows from 2 to 3 bytes, so `sizeof(struct task_group_s)` 
stays the same.
   
   Fix: move `tg_caps` next to another small field, or drop the size claim.



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