anchao commented on a change in pull request #5689:
URL: https://github.com/apache/incubator-nuttx/pull/5689#discussion_r822268252



##########
File path: drivers/segger/note_sysview.c
##########
@@ -155,11 +159,24 @@ static bool sysview_isenabled(void)
     }
 #endif
 
+#ifdef CONFIG_SCHED_INSTRUMENTATION_SYSCALL
+  /* Use the Syscall "0" to identify whether the syscall is enabled,

Review comment:
       The 0th syscall is a special symbol (_exit()), most calls focus only on 
exit()
   
   
https://github.com/apache/incubator-nuttx/blob/master/include/sys/syscall_lookup.h#L27




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