anchao commented on a change in pull request #5915:
URL: https://github.com/apache/incubator-nuttx/pull/5915#discussion_r840203982
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File path: include/nuttx/sched_note.h
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@@ -105,16 +105,32 @@
memset((s), 0, sizeof(struct note_filter_irq_s))
#endif
-/* Note dump module tag definitions */
-
#ifdef CONFIG_SCHED_INSTRUMENTATION_DUMP
-# define NOTE_MODULE(a, b, c, d) \
- ((uint32_t)((a) & 0xff) | \
- ((uint32_t)((b) & 0xff) << 8) | \
- ((uint32_t)((c) & 0xff) << 16) | \
- ((uint32_t)((d) & 0xff) << 24))
+# define SCHED_NOTE_IP \
+ ({__label__ sched_note_here; sched_note_here:
(uintptr_t)&&sched_note_here;})
Review comment:
This seems dose not to work, __label__ can ensure the uniqueness of the
current label, it can be guaranteed that the definition will not be duplicate
in the code scope:
`: error: duplicate label ‘sched_note_here’`
this practice is very common, you can see that the linux kernel uses this
extension a lot
https://github.com/torvalds/linux/blob/master/include/linux/instruction_pointer.h#L6
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