scripts/kernel-doc: separate out function signature

Format the entire function signature and place it in a separate variable;
this both makes it easier to understand what these lines of code are doing
and will allow us to simplify the code further in the following patch.

No functional change.

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240215134828.1277109-4-vegard.nossum@oracle.com

1 files changed, 28 insertions, 21 deletions

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 9b7441e776697f..1af2c68f6bd8eb 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -822,6 +822,31 @@ sub output_function_rst(%) {
     my $oldprefix = $lineprefix;
     my $is_macro = 0;
 
+    my $signature = "";
+    if ($args{'functiontype'} ne "") {
+        $signature = $args{'functiontype'} . " " . $args{'function'} . " (";
+    } else {
+        $signature = $args{'function'} . " (";
+    }
+
+    my $count = 0;
+    foreach my $parameter (@{$args{'parameterlist'}}) {
+        if ($count ne 0) {
+            $signature .= ", ";
+        }
+        $count++;
+        $type = $args{'parametertypes'}{$parameter};
+
+        if ($type =~ m/$function_pointer/) {
+            # pointer-to-function
+            $signature .= $1 . $parameter . ") (" . $2 . ")";
+        } else {
+            $signature .= $type;
+        }
+    }
+
+    $signature .= ")";
+
     if ($sphinx_major < 3) {
         if ($args{'typedef'}) {
             print ".. c:type:: ". $args{'function'} . "\n\n";
@@ -852,31 +877,13 @@ sub output_function_rst(%) {
             print "``" if ($is_macro);
         }
     }
-    if ($args{'functiontype'} ne "") {
-        print $args{'functiontype'} . " " . $args{'function'} . " (";
-    } else {
-        print $args{'function'} . " (";
-    }
 
-    my $count = 0;
-    foreach my $parameter (@{$args{'parameterlist'}}) {
-        if ($count ne 0) {
-            print ", ";
-        }
-        $count++;
-        $type = $args{'parametertypes'}{$parameter};
+    print $signature;
 
-        if ($type =~ m/$function_pointer/) {
-            # pointer-to-function
-            print $1 . $parameter . ") (" . $2 . ")";
-        } else {
-            print $type;
-        }
-    }
     if ($is_macro) {
-        print ")``\n\n";
+        print "``\n\n";
     } else {
-        print ")\n\n";
+        print "\n\n";
     }
     if (!$args{'typedef'}) {
         print_lineno($declaration_start_line);