get_maintainer: add subsystem to reviewer output

Reviewer output currently does not include the subsystem
that matched.  Add it.

Miscellanea:

o Add a get_subsystem_name routine to centralize this
Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/get_maintainer.pl

@@ -974,20 +974,29 @@ sub find_ending_index {
     return $index;
 }
 
-sub get_maintainer_role {
+sub get_subsystem_name {
     my ($index) = @_;
 
-    my $i;
     my $start = find_starting_index($index);
-    my $end = find_ending_index($index);
 
-    my $role = "unknown";
     my $subsystem = $typevalue[$start];
     if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
 	$subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
 	$subsystem =~ s/\s*$//;
 	$subsystem = $subsystem . "...";
     }
+    return $subsystem;
+}
+
+sub get_maintainer_role {
+    my ($index) = @_;
+
+    my $i;
+    my $start = find_starting_index($index);
+    my $end = find_ending_index($index);
+
+    my $role = "unknown";
+    my $subsystem = get_subsystem_name($index);
 
     for ($i = $start + 1; $i < $end; $i++) {
 	my $tv = $typevalue[$i];
@@ -1021,16 +1030,7 @@ sub get_maintainer_role {
 sub get_list_role {
     my ($index) = @_;
 
-    my $i;
-    my $start = find_starting_index($index);
-    my $end = find_ending_index($index);
-
-    my $subsystem = $typevalue[$start];
-    if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
-	$subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
-	$subsystem =~ s/\s*$//;
-	$subsystem = $subsystem . "...";
-    }
+    my $subsystem = get_subsystem_name($index);
 
     if ($subsystem eq "THE REST") {
 	$subsystem = "";
@@ -1118,7 +1118,8 @@ sub add_categories {
 		    }
 		}
 		if ($email_reviewer) {
-		    push_email_addresses($pvalue, 'reviewer');
+		    my $subsystem = get_subsystem_name($i);
+		    push_email_addresses($pvalue, "reviewer:$subsystem");
 		}
 	    } elsif ($ptype eq "T") {
 		push(@scm, $pvalue);