scripts: get_abi.pl: don't skip what that ends with wildcards

The search algorithm used inside check_undefined_symbols
has an optimization: it seeks only whats that have the same
leave name. This helps not only to speedup the search, but
it also allows providing a hint about a partial match.

There's a drawback, however: when "what:" finishes with a
wildcard, the logic will skip the what, reporting it as
"not found".

Fix it by grouping the remaining cases altogether, and
disabing any hints for such cases.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/79ba5139643355230e3bba136b20991cfc92020f.1631957565.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

scripts/get_abi.pl

@@ -589,8 +589,11 @@ sub check_undefined_symbols {
 			$found_string = 1;
 		}
 
+		if ($leave =~ /^\d+$/ || !defined($leaf{$leave})) {
+			$leave = "others";
+		}
+
 		print "--> $file\n" if ($found_string && $hint);
-		if (defined($leaf{$leave})) {
 		my $what = $leaf{$leave};
 		$whats .= " $what" if (!($whats =~ m/$what/));
 
@@ -626,7 +629,7 @@ sub check_undefined_symbols {
 		}
 
 		$defined++;
-		}
+
 		next if ($exact);
 
 		# Ignore some sysfs nodes
@@ -637,7 +640,7 @@ sub check_undefined_symbols {
 		# is not easily parseable.
 		next if ($file =~ m#/parameters/#);
 
-		if ($hint && $defined) {
+		if ($hint && $defined && $leave ne "others") {
 			print "$leave at $path might be one of:$whats\n"  if (!$search_string || $found_string);
 			next;
 		}
@@ -699,7 +702,16 @@ sub undefined_symbols {
 			my $leave = $what;
 			$leave =~ s,.*/,,;
 
-			next if ($leave =~ m/^\.\*/ || $leave eq "");
+			# $leave is used to improve search performance at
+			# check_undefined_symbols, as the algorithm there can seek
+			# for a small number of "what". It also allows giving a
+			# hint about a leave with the same name somewhere else.
+			# However, there are a few occurences where the leave is
+			# either a wildcard or a number. Just group such cases
+			# altogether.
+			if ($leave =~ m/^\.\*/ || $leave eq "" || $leave =~ /^\d+$/) {
+				$leave = "others" ;
+			}
 
 			# Escape all other symbols
 			$what =~ s/$escape_symbols/\\$1/g;