perf: Update PERF_RECORD_MISC_* comment for perf_event_header::misc bit 13

The perf_event_header::misc bit 13 is shared on different events and next patch is adding yet another bit 13 user. Updating the comment to make it more structured and clear which events use bit 13.

Jiri Olsa committed 8 years ago

Commit 972c1481 parent 99e818c2 files · +12 −6Browse files

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include/uapi/linux/perf_event.h+6−3

@@ -612,9 +612,12 @@ struct perf_event_mmap_page { · 611 unmodified lines
612	612	*/
613	613	#define PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT (1 << 12)
614	614	/*
615		− * PERF_RECORD_MISC_MMAP_DATA and PERF_RECORD_MISC_COMM_EXEC are used on
616		− * different events so can reuse the same bit position.
617		− * Ditto PERF_RECORD_MISC_SWITCH_OUT.
	615	+ * Following PERF_RECORD_MISC_* are used on different
	616	+ * events, so can reuse the same bit position:
	617	+ *
	618	+ * PERF_RECORD_MISC_MMAP_DATA - PERF_RECORD_MMAP* events
	619	+ * PERF_RECORD_MISC_COMM_EXEC - PERF_RECORD_COMM event
	620	+ * PERF_RECORD_MISC_SWITCH_OUT - PERF_RECORD_SWITCH* events
618	621	*/
619	622	#define PERF_RECORD_MISC_MMAP_DATA (1 << 13)
620	623	#define PERF_RECORD_MISC_COMM_EXEC (1 << 13)