Commit 6c6dbce1 authored Jan 14, 2019 by Steven Rostedt (VMware)

tracing: Add comment to predicate_parse() about "&&" or "||"

As the predicat_parse() code is rather complex, commenting subtleties is
important. The switch case statement should be commented to describe that it
is only looking for two '&' or '|' together, which is why the fall through
to an error is after the check.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent 9399ca21

kernel/trace/trace_events_filter.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -491,6 +491,7 @@ predicate_parse(const char *str, int nr_parens, int nr_preds,
		break;
		case '&':
		case '\|':
		/* accepting only "&&" or "\|\|" */
		if (next[1] == next[0]) {
		ptr++;
		break;