scripts/kernel-doc: update script from Linux 5.2

Update the script from Linux 5.2 to avoid some warnings.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

scripts/kernel-doc

@@ -212,7 +212,7 @@ my $anon_struct_union = 0;
 my $type_constant = '\b``([^\`]+)``\b';
 my $type_constant2 = '\%([-_\w]+)';
 my $type_func = '(\w+)\(\)';
-my $type_param = '\@(\w*(\.\w+)*(\.\.\.)?)';
+my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
 my $type_fp_param = '\@(\w+)\(\)';  # Special RST handling for func ptr params
 my $type_env = '(\$\w+)';
 my $type_enum = '\&(enum\s*([_\w]+))';
@@ -1062,7 +1062,7 @@ sub dump_struct($$) {
     my $x = shift;
     my $file = shift;
 
-    if ($x =~ /(struct|union)\s+(\w+)\s*{(.*)}/) {
+    if ($x =~ /(struct|union)\s+(\w+)\s*\{(.*)\}(\s*(__packed|__aligned|__attribute__\s*\(\([a-z0-9,_\s\(\)]*\)\)))*/) {
 	my $decl_type = $1;
 	$declaration_name = $2;
 	my $members = $3;
@@ -1073,8 +1073,9 @@ sub dump_struct($$) {
 	# strip comments:
 	$members =~ s/\/\*.*?\*\///gos;
 	# strip attributes
-	$members =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
-	$members =~ s/__aligned\s*\([^;]*\)//gos;
+	$members =~ s/\s*__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)//gi;
+	$members =~ s/\s*__aligned\s*\([^;]*\)//gos;
+	$members =~ s/\s*__packed\s*//gos;
 	$members =~ s/\s*CRYPTO_MINALIGN_ATTR//gos;
 	# replace DECLARE_BITMAP
 	$members =~ s/DECLARE_BITMAP\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
@@ -1148,20 +1149,20 @@ sub dump_struct($$) {
 				}
 			}
 		}
-		$members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)}([^\{\}\;]*)\;/$newmember/;
+		$members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/$newmember/;
 	}
 
 	# Ignore other nested elements, like enums
-	$members =~ s/({[^\{\}]*})//g;
+	$members =~ s/(\{[^\{\}]*\})//g;
 
 	create_parameterlist($members, ';', $file, $declaration_name);
 	check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
 
 	# Adjust declaration for better display
-	$declaration =~ s/([{;])/$1\n/g;
-	$declaration =~ s/}\s+;/};/g;
+	$declaration =~ s/([\{;])/$1\n/g;
+	$declaration =~ s/\}\s+;/};/g;
 	# Better handle inlined enums
-	do {} while ($declaration =~ s/(enum\s+{[^}]+),([^\n])/$1,\n$2/);
+	do {} while ($declaration =~ s/(enum\s+\{[^\}]+),([^\n])/$1,\n$2/);
 
 	my @def_args = split /\n/, $declaration;
 	my $level = 1;
@@ -1171,12 +1172,12 @@ sub dump_struct($$) {
 		$clause =~ s/\s+$//;
 		$clause =~ s/\s+/ /;
 		next if (!$clause);
-		$level-- if ($clause =~ m/(})/ && $level > 1);
+		$level-- if ($clause =~ m/(\})/ && $level > 1);
 		if (!($clause =~ m/^\s*#/)) {
 			$declaration .= "\t" x $level;
 		}
 		$declaration .= "\t" . $clause . "\n";
-		$level++ if ($clause =~ m/({)/ && !($clause =~m/}/));
+		$level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
 	}
 	output_declaration($declaration_name,
 			   'struct',
@@ -1244,7 +1245,7 @@ sub dump_enum($$) {
     # strip #define macros inside enums
     $x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
 
-    if ($x =~ /enum\s+(\w+)\s*{(.*)}/) {
+    if ($x =~ /enum\s+(\w+)\s*\{(.*)\}/) {
 	$declaration_name = $1;
 	my $members = $2;
 	my %_members;
@@ -1473,7 +1474,7 @@ sub push_parameter($$$$) {
 	if (!defined $parameterdescs{$param} && $param !~ /^#/) {
 		$parameterdescs{$param} = $undescribed;
 
-	        if (show_warnings($type, $declaration_name)) {
+	        if (show_warnings($type, $declaration_name) && $param !~ /\./) {
 			print STDERR
 			      "${file}:$.: warning: Function parameter or member '$param' not described in '$declaration_name'\n";
 			++$warnings;
@@ -1785,7 +1786,7 @@ sub process_proto_type($$) {
     }
 
     while (1) {
-	if ( $x =~ /([^{};]*)([{};])(.*)/ ) {
+	if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
             if( length $prototype ) {
                 $prototype .= " "
             }
@@ -1904,13 +1905,13 @@ sub process_name($$) {
 	    ++$warnings;
 	}
 
-	if ($identifier =~ m/^struct/) {
+	if ($identifier =~ m/^struct\b/) {
 	    $decl_type = 'struct';
-	} elsif ($identifier =~ m/^union/) {
+	} elsif ($identifier =~ m/^union\b/) {
 	    $decl_type = 'union';
-	} elsif ($identifier =~ m/^enum/) {
+	} elsif ($identifier =~ m/^enum\b/) {
 	    $decl_type = 'enum';
-	} elsif ($identifier =~ m/^typedef/) {
+	} elsif ($identifier =~ m/^typedef\b/) {
 	    $decl_type = 'typedef';
 	} else {
 	    $decl_type = 'function';