libtracefs: Do not check for deprecated functions

tracefs_event_append_filter() and tracefs_event_verify_filter() are
deprecated, where tracefs_filter_string_append() and
tracefs_filter_string_verify() should be used instead. They are purposely
not in the man pages. Do not have the checker warn about them.

Link: https://lore.kernel.org/linux-trace-devel/20220223003012.1334741-11-rostedt@goodmis.org

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
diff --git a/check-manpages.sh b/check-manpages.sh
index 33419a9..d3ec6af 100755
--- a/check-manpages.sh
+++ b/check-manpages.sh
@@ -37,8 +37,13 @@
 	done
 done
 
+DEPRECATED="*tracefs_event_append_filter* *tracefs_event_verify_filter*"
+
 sed -ne 's/^[a-z].*[ \*]\([a-z_][a-z_]*\)(.*/\1/p' -e 's/^\([a-z_][a-z_]*\)(.*/\1/p' ../include/tracefs.h | while read f; do
 	if ! grep -q '\*'${f}'\*' $MAIN_FILE; then
+		if [ "${DEPRECATED/\*$f\*/}" != "${DEPRECATED}" ]; then
+			continue;
+		fi
 		if [ "$last" == "" ]; then
 			echo
 			echo "Missing functions from $MAIN_FILE that are in tracefs.h"