1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/sphinx/kerneldoc.py b/Documentation/sphinx/kerneldoc.py
index 39ddae6ae7dd..344789ed9ea2 100644
--- a/Documentation/sphinx/kerneldoc.py
+++ b/Documentation/sphinx/kerneldoc.py
@@ -43,6 +43,29 @@ from sphinx.util import logging
 
 __version__  = '1.0'
 
+def cmd_str(cmd):
+    """
+    Helper function to output a command line that can be used to produce
+    the same records via command line. Helpful to debug troubles at the
+    script.
+    """
+
+    cmd_line = ""
+
+    for w in cmd:
+        if w == "" or " " in w:
+            esc_cmd = "'" + w + "'"
+        else:
+            esc_cmd = w
+
+        if cmd_line:
+            cmd_line += " " + esc_cmd
+            continue
+        else:
+            cmd_line = esc_cmd
+
+    return cmd_line
+
 class KernelDocDirective(Directive):
     """Extract kernel-doc comments from the specified file"""
     required_argument = 1
@@ -57,6 +80,7 @@ class KernelDocDirective(Directive):
     }
     has_content = False
     logger = logging.getLogger('kerneldoc')
+    verbose = 0
 
     def run(self):
         env = self.state.document.settings.env
@@ -65,6 +89,13 @@ class KernelDocDirective(Directive):
         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
         export_file_patterns = []
 
+        verbose = os.environ.get("V")
+        if verbose:
+            try:
+                self.verbose = int(verbose)
+            except ValueError:
+                pass
+
         # Tell sphinx of the dependency
         env.note_dependency(os.path.abspath(filename))
 
@@ -87,6 +118,10 @@ class KernelDocDirective(Directive):
             identifiers = self.options.get('identifiers').split()
             if identifiers:
                 for i in identifiers:
+                    i = i.rstrip("\\").strip()
+                    if not i:
+                        continue
+
                     cmd += ['-function', i]
             else:
                 cmd += ['-no-doc-sections']
@@ -95,15 +130,26 @@ class KernelDocDirective(Directive):
             no_identifiers = self.options.get('no-identifiers').split()
             if no_identifiers:
                 for i in no_identifiers:
+                    i = i.rstrip("\\").strip()
+                    if not i:
+                        continue
+
                     cmd += ['-nosymbol', i]
 
         for pattern in export_file_patterns:
+            pattern = pattern.rstrip("\\").strip()
+            if not pattern:
+                continue
+
             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
                 env.note_dependency(os.path.abspath(f))
                 cmd += ['-export-file', f]
 
         cmd += [filename]
 
+        if self.verbose >= 1:
+            print(cmd_str(cmd))
+
         try:
             self.logger.verbose("calling kernel-doc '%s'" % (" ".join(cmd)))