diff --git a/core/includes/actions.inc b/core/includes/actions.inc
index 760de83..c236a1e 100644
--- a/core/includes/actions.inc
+++ b/core/includes/actions.inc
@@ -160,7 +160,7 @@ function actions_do($action_ids, $object = NULL, $context = NULL, $a1 = NULL, $a
 function actions_list($reset = FALSE) {
   $actions = &drupal_static(__FUNCTION__);
   if (!isset($actions) || $reset) {
-    $actions = module_invoke_all('action_info');
+    $actions = module_signal_all('action_info');
     drupal_alter('action_info', $actions);
   }
 
@@ -378,6 +378,6 @@ function actions_delete($aid) {
   db_delete('actions')
     ->condition('aid', $aid)
     ->execute();
-  module_invoke_all('actions_delete', $aid);
+  module_invoke1_all('actions_delete', $aid);
 }
 
diff --git a/core/includes/ajax.inc b/core/includes/ajax.inc
index cda55b4..edc875b 100644
--- a/core/includes/ajax.inc
+++ b/core/includes/ajax.inc
@@ -559,7 +559,7 @@ function ajax_footer() {
   // modules that need very fast Ajax responses, and therefore, run Ajax
   // requests with an early bootstrap.
   if (drupal_get_bootstrap_phase() == DRUPAL_BOOTSTRAP_FULL && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update')) {
-    module_invoke_all('exit');
+    module_signal_all('exit');
   }
 
   // Commit the user session. See above comment about the possibility of this
diff --git a/core/includes/common.inc b/core/includes/common.inc
index 1bd8b19..8363bd0 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2530,7 +2530,7 @@ function drupal_deliver_html_page($page_callback_result) {
 function drupal_page_footer() {
   global $user;
 
-  module_invoke_all('exit');
+  module_signal_all('exit');
 
   // Commit the user session, if needed.
   drupal_session_commit();
@@ -2563,7 +2563,7 @@ function drupal_page_footer() {
 function drupal_exit($destination = NULL) {
   if (drupal_get_bootstrap_phase() == DRUPAL_BOOTSTRAP_FULL) {
     if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
-      module_invoke_all('exit', $destination);
+      module_invoke1_all('exit', $destination);
     }
     drupal_session_commit();
   }
@@ -5049,7 +5049,7 @@ function _drupal_bootstrap_full() {
     //   ahead of when rendering starts.
     menu_set_custom_theme();
     drupal_theme_initialize();
-    module_invoke_all('init');
+    module_signal_all('init');
   }
 }
 
@@ -5128,7 +5128,7 @@ function drupal_cron_run() {
 
   $return = FALSE;
   // Grab the defined cron queues.
-  $queues = module_invoke_all('cron_queue_info');
+  $queues = module_signal_all('cron_queue_info');
   drupal_alter('cron_queue_info', $queues);
 
   // Try to acquire cron lock.
@@ -6165,7 +6165,7 @@ function element_info($type) {
   $cache = &$drupal_static_fast['cache'];
 
   if (!isset($cache)) {
-    $cache = module_invoke_all('element_info');
+    $cache = module_signal_all('element_info');
     foreach ($cache as $element_type => $info) {
       $cache[$element_type]['#type'] = $element_type;
     }
@@ -7270,7 +7270,7 @@ function drupal_flush_all_caches() {
   // Don't clear cache_form - in-progress form submissions may break.
   // Ordered so clearing the page cache will always be the last action.
   $core = array('cache', 'path', 'filter', 'bootstrap', 'page');
-  $cache_bins = array_merge(module_invoke_all('flush_caches'), $core);
+  $cache_bins = array_merge(module_signal_all('flush_caches'), $core);
   foreach ($cache_bins as $bin) {
     cache($bin)->flush();
   }
@@ -7443,7 +7443,7 @@ function archiver_get_info() {
     $cache = cache()->get('archiver_info');
     if ($cache === FALSE) {
       // Rebuild the cache and save it.
-      $archiver_info = module_invoke_all('archiver_info');
+      $archiver_info = module_signal_all('archiver_info');
       drupal_alter('archiver_info', $archiver_info);
       uasort($archiver_info, 'drupal_sort_weight');
       cache()->set('archiver_info', $archiver_info);
@@ -7526,7 +7526,7 @@ function archiver_get_archiver($file) {
 function drupal_get_updaters() {
   $updaters = &drupal_static(__FUNCTION__);
   if (!isset($updaters)) {
-    $updaters = module_invoke_all('updater_info');
+    $updaters = module_signal_all('updater_info');
     drupal_alter('updater_info', $updaters);
     uasort($updaters, 'drupal_sort_weight');
   }
diff --git a/core/includes/file.inc b/core/includes/file.inc
index 6e6611f..a107c23 100644
--- a/core/includes/file.inc
+++ b/core/includes/file.inc
@@ -128,7 +128,7 @@ function file_get_stream_wrappers($filter = STREAM_WRAPPERS_ALL) {
   $wrappers_storage = &drupal_static(__FUNCTION__);
 
   if (!isset($wrappers_storage)) {
-    $wrappers = module_invoke_all('stream_wrappers');
+    $wrappers = module_signal_all('stream_wrappers');
     foreach ($wrappers as $scheme => $info) {
       // Add defaults.
       $wrappers[$scheme] += array('type' => STREAM_WRAPPERS_NORMAL);
@@ -577,19 +577,19 @@ function file_save(stdClass $file) {
     $file->original = entity_load_unchanged('file', $file->fid);
   }
 
-  module_invoke_all('file_presave', $file);
+  module_invoke1_all('file_presave', $file);
   module_invoke_all('entity_presave', $file, 'file');
 
   if (empty($file->fid)) {
     drupal_write_record('file_managed', $file);
     // Inform modules about the newly added file.
-    module_invoke_all('file_insert', $file);
+    module_invoke1_all('file_insert', $file);
     module_invoke_all('entity_insert', $file, 'file');
   }
   else {
     drupal_write_record('file_managed', $file, 'fid');
     // Inform modules that the file has been updated.
-    module_invoke_all('file_update', $file);
+    module_invoke1_all('file_update', $file);
     module_invoke_all('entity_update', $file, 'file');
   }
 
@@ -1247,7 +1247,7 @@ function file_delete(stdClass $file, $force = FALSE) {
   }
 
   // Let other modules clean up any references to the deleted file.
-  module_invoke_all('file_delete', $file);
+  module_invoke1_all('file_delete', $file);
   module_invoke_all('entity_delete', $file, 'file');
 
   // Make sure the file is deleted before removing its row from the
@@ -1635,7 +1635,7 @@ function file_validate(stdClass &$file, $validators = array()) {
   }
 
   // Let other modules perform validation on the new file.
-  return array_merge($errors, module_invoke_all('file_validate', $file));
+  return array_merge($errors, module_invoke1_all('file_validate', $file));
 }
 
 /**
diff --git a/core/includes/image.inc b/core/includes/image.inc
index 8dc36b9..b1cb717 100644
--- a/core/includes/image.inc
+++ b/core/includes/image.inc
@@ -41,7 +41,7 @@
  */
 function image_get_available_toolkits() {
   // hook_image_toolkits returns an array of toolkit names.
-  $toolkits = module_invoke_all('image_toolkits');
+  $toolkits = module_signal_all('image_toolkits');
 
   $output = array();
   foreach ($toolkits as $name => $info) {
diff --git a/core/includes/install.inc b/core/includes/install.inc
index 514d89c..2d2ac8b 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -793,7 +793,7 @@ function drupal_uninstall_modules($module_list = array(), $uninstall_dependents
 
   if (!empty($module_list)) {
     // Call hook_module_uninstall to let other modules act
-    module_invoke_all('modules_uninstalled', $module_list);
+    module_invoke1_all('modules_uninstalled', $module_list);
   }
 
   return TRUE;
diff --git a/core/includes/language.inc b/core/includes/language.inc
index 685a4d4..52684c1 100644
--- a/core/includes/language.inc
+++ b/core/includes/language.inc
@@ -21,7 +21,7 @@ function language_types_info() {
   $language_types = &drupal_static(__FUNCTION__);
 
   if (!isset($language_types)) {
-    $language_types = module_invoke_all('language_types_info');
+    $language_types = module_signal_all('language_types_info');
     // Let other modules alter the list of language types.
     drupal_alter('language_types_info', $language_types);
   }
@@ -293,7 +293,7 @@ function language_negotiation_info() {
 
   if (!isset($language_providers)) {
     // Collect all the module-defined language negotiation providers.
-    $language_providers = module_invoke_all('language_negotiation_info');
+    $language_providers = module_signal_all('language_negotiation_info');
 
     // Add the default language provider.
     $language_providers[LANGUAGE_NEGOTIATION_DEFAULT] = array(
diff --git a/core/includes/locale.inc b/core/includes/locale.inc
index e9cd427..23cf5d7 100644
--- a/core/includes/locale.inc
+++ b/core/includes/locale.inc
@@ -527,17 +527,17 @@ function locale_language_save($language) {
     $language->enabled = TRUE;
   }
   // Let other modules modify $language before saved.
-  module_invoke_all('locale_language_presave', $language);
+  module_invoke1_all('locale_language_presave', $language);
 
   // Save the record and inform others about the change.
   if ($language->is_new) {
     drupal_write_record('languages', $language);
-    module_invoke_all('locale_language_insert', $language);
+    module_invoke1_all('locale_language_insert', $language);
     watchdog('locale', 'The %language (%langcode) language has been created.', array('%language' => $language->name, '%langcode' => $language->language));
   }
   else {
     drupal_write_record('languages', $language, array('language'));
-    module_invoke_all('locale_language_update', $language);
+    module_invoke1_all('locale_language_update', $language);
     watchdog('locale', 'The %language (%langcode) language has been updated.', array('%language' => $language->name, '%langcode' => $language->language));
   }
 
diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index f23eb0d..d091d2f 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -1720,7 +1720,7 @@ function menu_get_custom_theme($initialize = FALSE) {
     // First allow modules to dynamically set a custom theme for the current
     // page. Since we can only have one, the last module to return a valid
     // theme takes precedence.
-    $custom_themes = array_filter(module_invoke_all('custom_theme'), 'drupal_theme_access');
+    $custom_themes = array_filter(module_signal_all('custom_theme'), 'drupal_theme_access');
     if (!empty($custom_themes)) {
       $custom_theme = array_pop($custom_themes);
     }
@@ -2937,7 +2937,7 @@ function _menu_delete_item($item, $force = FALSE) {
     }
 
     // Notify modules we are deleting the item.
-    module_invoke_all('menu_link_delete', $item);
+    module_invoke1_all('menu_link_delete', $item);
 
     db_delete('menu_links')->condition('mlid', $item['mlid'])->execute();
 
diff --git a/core/includes/module.inc b/core/includes/module.inc
index cca2ef9..b4d3ccf 100644
--- a/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -426,7 +426,7 @@ function module_enable($module_list, $enable_dependencies = TRUE) {
       drupal_get_schema(NULL, TRUE);
 
       // Allow modules to react prior to the installation of a module.
-      module_invoke_all('modules_preinstall', array($module));
+      module_invoke1_all('modules_preinstall', array($module));
 
       // Now install the module if necessary.
       if (drupal_get_installed_schema_version($module, TRUE) == SCHEMA_UNINSTALLED) {
@@ -452,7 +452,7 @@ function module_enable($module_list, $enable_dependencies = TRUE) {
       }
 
       // Allow modules to react prior to the enabling of a module.
-      module_invoke_all('modules_preenable', array($module));
+      module_invoke1_all('modules_preenable', array($module));
 
       // Enable the module.
       module_invoke($module, 'enable');
@@ -465,12 +465,12 @@ function module_enable($module_list, $enable_dependencies = TRUE) {
 
   // If any modules were newly installed, invoke hook_modules_installed().
   if (!empty($modules_installed)) {
-    module_invoke_all('modules_installed', $modules_installed);
+    module_invoke1_all('modules_installed', $modules_installed);
   }
 
   // If any modules were newly enabled, invoke hook_modules_enabled().
   if (!empty($modules_enabled)) {
-    module_invoke_all('modules_enabled', $modules_enabled);
+    module_invoke1_all('modules_enabled', $modules_enabled);
   }
 
   return TRUE;
@@ -544,7 +544,7 @@ function module_disable($module_list, $disable_dependents = TRUE) {
     module_implements_reset();
     // Invoke hook_modules_disabled before disabling modules,
     // so we can still call module hooks to get information.
-    module_invoke_all('modules_disabled', $invoke_modules);
+    module_invoke1_all('modules_disabled', $invoke_modules);
     // Update the registry to remove the newly-disabled module.
     registry_update();
     _system_update_bootstrap_status();
@@ -830,6 +830,47 @@ function module_invoke_all($hook) {
 }
 
 /**
+ * Invoke a hook (without paremeters) in all enabled modules
+ *
+ * @param string $signal
+ * @return array return values
+ */
+function module_signal_all($signal) {
+  $return = array();
+  foreach (module_implements($signal) as $module) {
+    $function = $module . '_' . $signal;
+    $result = $function();
+    if (isset($result) && is_array($result)) {
+      $return = array_merge_recursive($return, $result);
+    }
+    elseif (isset($result)) {
+      $return[] = $result;
+    }
+  }
+  return $return;
+}
+
+function module_invoke1_all($hook, $argument) {
+  $return = array();
+  foreach (module_implements($hook) as $module) {
+    $function = $module . '_' . $hook;
+    $result = $function($argument);
+    if (isset($result) && is_array($result)) {
+      $return = array_merge_recursive($return, $result);
+    }
+    elseif (isset($result)) {
+      $return[] = $result;
+    }
+  }
+  return $return;
+}
+
+/**
+ * Invoke a hook (without paremeters) in all enabled modules
+ *
+}
+
+/**
  * @} End of "defgroup hooks".
  */
 
diff --git a/core/includes/path.inc b/core/includes/path.inc
index 630b34c..4f79090 100644
--- a/core/includes/path.inc
+++ b/core/includes/path.inc
@@ -439,10 +439,10 @@ function path_save(&$path) {
   // Verify that a record was written.
   if ($status) {
     if ($status === SAVED_NEW) {
-      module_invoke_all('path_insert', $path);
+      module_invoke1_all('path_insert', $path);
     }
     else {
-      module_invoke_all('path_update', $path);
+      module_invoke1_all('path_update', $path);
     }
     drupal_clear_path_cache($path['source']);
   }
@@ -464,7 +464,7 @@ function path_delete($criteria) {
     $query->condition($field, $value);
   }
   $query->execute();
-  module_invoke_all('path_delete', $path);
+  module_invoke1_all('path_delete', $path);
   drupal_clear_path_cache($path['source']);
 }
 
@@ -511,7 +511,7 @@ function path_is_admin($path) {
 function path_get_admin_paths() {
   $patterns = &drupal_static(__FUNCTION__);
   if (!isset($patterns)) {
-    $paths = module_invoke_all('admin_paths');
+    $paths = module_signal_all('admin_paths');
     drupal_alter('admin_paths', $paths);
     // Combine all admin paths into one array, and likewise for non-admin paths,
     // for easier handling.
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 68dd70b..970542e 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1418,7 +1418,7 @@ function theme_enable($theme_list) {
   drupal_theme_rebuild();
 
   // Invoke hook_themes_enabled() after the themes have been enabled.
-  module_invoke_all('themes_enabled', $theme_list);
+  module_invoke1_all('themes_enabled', $theme_list);
 }
 
 /**
@@ -1451,7 +1451,7 @@ function theme_disable($theme_list) {
   drupal_theme_rebuild();
 
   // Invoke hook_themes_disabled after the themes have been disabled.
-  module_invoke_all('themes_disabled', $theme_list);
+  module_invoke1_all('themes_disabled', $theme_list);
 }
 
 /**
diff --git a/core/includes/token.inc b/core/includes/token.inc
index 7a5fea1..c83c0f1 100644
--- a/core/includes/token.inc
+++ b/core/includes/token.inc
@@ -250,7 +250,7 @@ function token_find_with_prefix(array $tokens, $prefix, $delimiter = ':') {
 function token_info() {
   $data = &drupal_static(__FUNCTION__);
   if (!isset($data)) {
-    $data = module_invoke_all('token_info');
+    $data = module_signal_all('token_info');
     drupal_alter('token_info', $data);
   }
   return $data;
diff --git a/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
index 72e31c3..a21a9ae 100644
--- a/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -567,7 +567,7 @@ function aggregator_save_feed($edit) {
 function aggregator_remove($feed) {
   _aggregator_get_variables();
   // Call hook_aggregator_remove() on all modules.
-  module_invoke_all('aggregator_remove', $feed);
+  module_invoke1_all('aggregator_remove', $feed);
   // Reset feed.
   db_merge('aggregator_feed')
     ->key(array('fid' => $feed->fid))
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index ae9278c..2bdb485 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -1469,7 +1469,7 @@ function comment_save($comment) {
     field_attach_presave('comment', $comment);
 
     // Allow modules to alter the comment before saving.
-    module_invoke_all('comment_presave', $comment);
+    module_invoke1_all('comment_presave', $comment);
     module_invoke_all('entity_presave', $comment, 'comment');
 
     if ($comment->cid) {
@@ -1485,7 +1485,7 @@ function comment_save($comment) {
 
       field_attach_update('comment', $comment);
       // Allow modules to respond to the updating of a comment.
-      module_invoke_all('comment_update', $comment);
+      module_invoke1_all('comment_update', $comment);
       module_invoke_all('entity_update', $comment, 'comment');
     }
     else {
@@ -1567,11 +1567,11 @@ function comment_save($comment) {
       field_attach_insert('comment', $comment);
 
       // Tell the other modules a new comment has been submitted.
-      module_invoke_all('comment_insert', $comment);
+      module_invoke1_all('comment_insert', $comment);
       module_invoke_all('entity_insert', $comment, 'comment');
     }
     if ($comment->status == COMMENT_PUBLISHED) {
-      module_invoke_all('comment_publish', $comment);
+      module_invoke1_all('comment_publish', $comment);
     }
     unset($comment->original);
   }
@@ -1610,7 +1610,7 @@ function comment_delete_multiple($cids) {
         ->execute();
       foreach ($comments as $comment) {
         field_attach_delete('comment', $comment);
-        module_invoke_all('comment_delete', $comment);
+        module_invoke1_all('comment_delete', $comment);
         module_invoke_all('entity_delete', $comment, 'comment');
 
         // Delete the comment's replies.
diff --git a/core/modules/dashboard/dashboard.module b/core/modules/dashboard/dashboard.module
index 1216cc0..336525c 100644
--- a/core/modules/dashboard/dashboard.module
+++ b/core/modules/dashboard/dashboard.module
@@ -457,7 +457,7 @@ function dashboard_is_visible() {
  * Return an array of dashboard region descriptions, keyed by region name.
  */
 function dashboard_region_descriptions() {
-  $regions = module_invoke_all('dashboard_regions');
+  $regions = module_signal_all('dashboard_regions');
   drupal_alter('dashboard_regions', $regions);
   return $regions;
 }
diff --git a/core/modules/entity/entity.module b/core/modules/entity/entity.module
index 02611e3..3de86c8 100644
--- a/core/modules/entity/entity.module
+++ b/core/modules/entity/entity.module
@@ -61,7 +61,7 @@ function entity_get_info($entity_type = NULL) {
       $entity_info = $cache->data;
     }
     else {
-      $entity_info = module_invoke_all('entity_info');
+      $entity_info = module_signal_all('entity_info');
       // Merge in default values.
       foreach ($entity_info as $name => $data) {
         $entity_info[$name] += array(
diff --git a/core/modules/field/field.crud.inc b/core/modules/field/field.crud.inc
index e34c0c5..9de39ef 100644
--- a/core/modules/field/field.crud.inc
+++ b/core/modules/field/field.crud.inc
@@ -188,7 +188,7 @@ function field_create_field($field) {
   field_cache_clear(TRUE);
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  module_invoke_all('field_create_field', $field);
+  module_invoke1_all('field_create_field', $field);
 
   return $field;
 }
@@ -362,7 +362,7 @@ function field_read_fields($params = array(), $include_additional = array()) {
     $field['translatable'] = $record['translatable'];
     $field['deleted'] = $record['deleted'];
 
-    module_invoke_all('field_read_field', $field);
+    module_invoke1_all('field_read_field', $field);
 
     // Populate storage information.
     module_load_install($field['module']);
@@ -409,7 +409,7 @@ function field_delete_field($field_name) {
   // Clear the cache.
   field_cache_clear(TRUE);
 
-  module_invoke_all('field_delete_field', $field);
+  module_invoke1_all('field_delete_field', $field);
 }
 
 /**
@@ -492,7 +492,7 @@ function field_create_instance($instance) {
   field_cache_clear();
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  module_invoke_all('field_create_instance', $instance);
+  module_invoke1_all('field_create_instance', $instance);
 
   return $instance;
 }
@@ -713,7 +713,7 @@ function field_read_instances($params = array(), $include_additional = array())
       $instance['bundle'] = $record['bundle'];
       $instance['deleted'] = $record['deleted'];
 
-      module_invoke_all('field_read_instance', $instance);
+      module_invoke1_all('field_read_instance', $instance);
       $instances[] = $instance;
     }
   }
@@ -747,7 +747,7 @@ function field_delete_instance($instance, $field_cleanup = TRUE) {
   module_invoke($field['storage']['module'], 'field_storage_delete_instance', $instance);
 
   // Let modules react to the deletion of the instance.
-  module_invoke_all('field_delete_instance', $instance);
+  module_invoke1_all('field_delete_instance', $instance);
 
   // Delete the field itself if we just deleted its last instance.
   if ($field_cleanup && count($field['bundles']) == 0) {
@@ -934,7 +934,7 @@ function field_purge_instance($instance) {
   field_info_cache_clear();
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  module_invoke_all('field_purge_instance', $instance);
+  module_invoke1_all('field_purge_instance', $instance);
 }
 
 /**
@@ -963,7 +963,7 @@ function field_purge_field($field) {
   field_info_cache_clear();
 
   // Invoke external hooks after the cache is cleared for API consistency.
-  module_invoke_all('field_purge_field', $field);
+  module_invoke1_all('field_purge_field', $field);
 }
 
 /**
diff --git a/core/modules/field/field.info.inc b/core/modules/field/field.info.inc
index 69fefca..f76e065 100644
--- a/core/modules/field/field.info.inc
+++ b/core/modules/field/field.info.inc
@@ -231,7 +231,7 @@ function _field_info_collate_fields() {
       }
 
       // Populate 'extra_fields'.
-      $extra = module_invoke_all('field_extra_fields');
+      $extra = module_signal_all('field_extra_fields');
       drupal_alter('field_extra_fields', $extra);
       // Merge in saved settings.
       foreach ($extra as $entity_type => $bundles) {
diff --git a/core/modules/filter/filter.module b/core/modules/filter/filter.module
index 2ad725a..7871e90 100644
--- a/core/modules/filter/filter.module
+++ b/core/modules/filter/filter.module
@@ -249,10 +249,10 @@ function filter_format_save($format) {
   }
 
   if ($return == SAVED_NEW) {
-    module_invoke_all('filter_format_insert', $format);
+    module_invoke1_all('filter_format_insert', $format);
   }
   else {
-    module_invoke_all('filter_format_update', $format);
+    module_invoke1_all('filter_format_update', $format);
     // Explicitly indicate that the format was updated. We need to do this
     // since if the filters were updated but the format object itself was not,
     // the merge query above would not return an indication that anything had
@@ -286,7 +286,7 @@ function filter_format_disable($format) {
     ->execute();
 
   // Allow modules to react on text format deletion.
-  module_invoke_all('filter_format_disable', $format);
+  module_invoke1_all('filter_format_disable', $format);
 
   // Clear the filter cache whenever a text format is disabled.
   filter_formats_reset();
diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index 54d98eb..b7baee9 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -284,7 +284,7 @@ function image_file_download($uri) {
     // Check that the file exists and is an image.
     if ($info = image_get_info($uri)) {
       // Check the permissions of the original to grant access to this image.
-      $headers = module_invoke_all('file_download', $original_uri);
+      $headers = module_invoke1_all('file_download', $original_uri);
       if (!in_array(-1, $headers)) {
         return array(
           // Send headers describing the image's size, and MIME-type...
@@ -606,7 +606,7 @@ function image_style_save($style) {
   }
 
   // Let other modules update as necessary on save.
-  module_invoke_all('image_style_save', $style);
+  module_invoke1_all('image_style_save', $style);
 
   // Clear all caches and flush.
   image_style_flush($style);
@@ -634,7 +634,7 @@ function image_style_delete($style, $replacement_style_name = '') {
   // Let other modules update as necessary on save.
   $style['old_name'] = $style['name'];
   $style['name'] = $replacement_style_name;
-  module_invoke_all('image_style_delete', $style);
+  module_invoke1_all('image_style_delete', $style);
 
   return TRUE;
 }
@@ -711,7 +711,7 @@ function image_style_deliver($style, $scheme) {
       file_download($scheme, file_uri_target($derivative_uri));
     }
     else {
-      $headers = module_invoke_all('file_download', $image_uri);
+      $headers = module_invoke1_all('file_download', $image_uri);
       if (in_array(-1, $headers) || empty($headers)) {
         return drupal_access_denied();
       }
@@ -852,7 +852,7 @@ function image_style_flush($style) {
   }
 
   // Let other modules update as necessary on flush.
-  module_invoke_all('image_style_flush', $style);
+  module_invoke1_all('image_style_flush', $style);
 
   // Clear image style and effect caches.
   cache()->delete('image_styles');
diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index 103c284..cce83be 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -795,7 +795,7 @@ function locale_language_delete($langcode) {
   if (isset($languages[$langcode])) {
     $language = $languages[$langcode];
 
-    module_invoke_all('locale_language_delete', $language);
+    module_invoke1_all('locale_language_delete', $language);
 
     // Remove translations first.
     db_delete('locales_target')
diff --git a/core/modules/menu/menu.module b/core/modules/menu/menu.module
index cd42256..8b58463 100644
--- a/core/modules/menu/menu.module
+++ b/core/modules/menu/menu.module
@@ -268,11 +268,11 @@ function menu_save($menu) {
 
   switch ($status) {
     case SAVED_NEW:
-      module_invoke_all('menu_insert', $menu);
+      module_invoke1_all('menu_insert', $menu);
       break;
 
     case SAVED_UPDATED:
-      module_invoke_all('menu_update', $menu);
+      module_invoke1_all('menu_update', $menu);
       break;
   }
 }
@@ -311,7 +311,7 @@ function menu_delete($menu) {
     ->execute();
 
   menu_cache_clear_all();
-  module_invoke_all('menu_delete', $menu);
+  module_invoke1_all('menu_delete', $menu);
 }
 
 /**
diff --git a/core/modules/node/content_types.inc b/core/modules/node/content_types.inc
index d58bc31..b4c1364 100644
--- a/core/modules/node/content_types.inc
+++ b/core/modules/node/content_types.inc
@@ -397,7 +397,7 @@ function node_node_type_update($info) {
  *   then nothing happens.
  */
 function node_type_reset($type) {
-  $info_array = module_invoke_all('node_info');
+  $info_array = module_signal_all('node_info');
   if (isset($info_array[$type->orig_type])) {
     $info_array[$type->orig_type]['type'] = $type->orig_type;
     $info = node_type_set_defaults($info_array[$type->orig_type]);
diff --git a/core/modules/node/node.admin.inc b/core/modules/node/node.admin.inc
index 8f46df4..19f7dd9 100644
--- a/core/modules/node/node.admin.inc
+++ b/core/modules/node/node.admin.inc
@@ -366,7 +366,7 @@ function node_admin_nodes() {
     '#access' => $admin_access,
   );
   $options = array();
-  foreach (module_invoke_all('node_operations') as $operation => $array) {
+  foreach (module_signal_all('node_operations') as $operation => $array) {
     $options[$operation] = $array['label'];
   }
   $form['options']['operation'] = array(
@@ -539,7 +539,7 @@ function node_admin_nodes_validate($form, &$form_state) {
  * Execute the chosen 'Update option' on the selected nodes.
  */
 function node_admin_nodes_submit($form, &$form_state) {
-  $operations = module_invoke_all('node_operations');
+  $operations = module_signal_all('node_operations');
   $operation = $operations[$form_state['values']['operation']];
   // Filter out unchecked nodes
   $nodes = array_filter($form_state['values']['nodes']);
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 81ee841..4d676f9 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -517,7 +517,7 @@ function node_type_save($info) {
     if (!empty($type->old_type) && $type->old_type != $type->type) {
       field_attach_rename_bundle('node', $type->old_type, $type->type);
     }
-    module_invoke_all('node_type_update', $type);
+    module_invoke1_all('node_type_update', $type);
     $status = SAVED_UPDATED;
   }
   else {
@@ -528,7 +528,7 @@ function node_type_save($info) {
 
     field_attach_create_bundle('node', $type->type);
 
-    module_invoke_all('node_type_insert', $type);
+    module_invoke1_all('node_type_insert', $type);
     $status = SAVED_NEW;
   }
 
@@ -620,7 +620,7 @@ function node_type_delete($type) {
     ->condition('type', $type)
     ->execute();
   field_attach_delete_bundle('node', $type);
-  module_invoke_all('node_type_delete', $info);
+  module_invoke1_all('node_type_delete', $info);
 
   // Clear the node type cache.
   node_type_cache_reset();
@@ -958,7 +958,7 @@ function node_object_prepare($node) {
   $node->revision = in_array('revision', $node_options);
 
   node_invoke($node, 'prepare');
-  module_invoke_all('node_prepare', $node);
+  module_invoke1_all('node_prepare', $node);
 }
 
 /**
@@ -1057,7 +1057,7 @@ function node_save($node) {
     $update_node = TRUE;
 
     // Let modules modify the node before it is saved to the database.
-    module_invoke_all('node_presave', $node);
+    module_invoke1_all('node_presave', $node);
     module_invoke_all('entity_presave', $node, 'node');
 
     if ($node->is_new || !empty($node->revision)) {
@@ -1199,7 +1199,7 @@ function node_delete_multiple($nids) {
       foreach ($nodes as $nid => $node) {
         // Call the node-specific callback (if any):
         node_invoke($node, 'delete');
-        module_invoke_all('node_delete', $node);
+        module_invoke1_all('node_delete', $node);
         module_invoke_all('entity_delete', $node, 'node');
         field_attach_delete('node', $node);
 
@@ -1255,7 +1255,7 @@ function node_revision_delete($revision_id) {
       ->condition('nid', $revision->nid)
       ->condition('vid', $revision->vid)
       ->execute();
-    module_invoke_all('node_revision_delete', $revision);
+    module_invoke1_all('node_revision_delete', $revision);
     field_attach_delete_revision('node', $revision);
     return TRUE;
   }
@@ -1552,7 +1552,7 @@ function node_permission() {
  *   A query object that has been extended with the Search DB Extender.
  */
 function _node_rankings(SelectQueryExtender $query) {
-  if ($ranking = module_invoke_all('ranking')) {
+  if ($ranking = module_signal_all('ranking')) {
     $tables = &$query->getTables();
     foreach ($ranking as $rank => $values) {
       if ($node_rank = variable_get('node_rank_' . $rank, 0)) {
@@ -1619,7 +1619,7 @@ function node_search_admin() {
 
   // Note: reversed to reflect that higher number = higher ranking.
   $options = drupal_map_assoc(range(0, 10));
-  foreach (module_invoke_all('ranking') as $var => $values) {
+  foreach (module_signal_all('ranking') as $var => $values) {
     $form['content_ranking']['factors']['node_rank_' . $var] = array(
       '#title' => $values['title'],
       '#type' => 'select',
@@ -1671,7 +1671,7 @@ function node_search_execute($keys = NULL, $conditions = NULL) {
     // Fetch comments for snippet.
     $node->rendered .= ' ' . module_invoke('comment', 'node_update_index', $node);
 
-    $extra = module_invoke_all('node_search_result', $node);
+    $extra = module_invoke1_all('node_search_result', $node);
 
     $uri = entity_uri('node', $node);
     $results[] = array(
@@ -2644,7 +2644,7 @@ function _node_index_node($node) {
   $text = '<h1>' . check_plain($node->title) . '</h1>' . $node->rendered;
 
   // Fetch extra data normally not visible
-  $extra = module_invoke_all('node_update_index', $node);
+  $extra = module_invoke1_all('node_update_index', $node);
   foreach ($extra as $t) {
     $text .= $t;
   }
@@ -3326,7 +3326,7 @@ function _node_query_node_access_alter($query, $type) {
  *   Defaults to TRUE.
  */
 function node_access_acquire_grants($node, $delete = TRUE) {
-  $grants = module_invoke_all('node_access_records', $node);
+  $grants = module_invoke1_all('node_access_records', $node);
   // Let modules alter the grants.
   drupal_alter('node_access_records', $grants, $node);
   // If no grants are set and the node is published, then use the default grant.
diff --git a/core/modules/openid/openid.inc b/core/modules/openid/openid.inc
index 6945f34..17bfae1 100644
--- a/core/modules/openid/openid.inc
+++ b/core/modules/openid/openid.inc
@@ -252,7 +252,7 @@ function _openid_is_xri($identifier) {
  * The procedure is described in OpenID Authentication 2.0, section 7.2.
  */
 function openid_normalize($identifier) {
-  $methods = module_invoke_all('openid_normalization_method_info');
+  $methods = module_signal_all('openid_normalization_method_info');
   drupal_alter('openid_normalization_method_info', $methods);
 
   // Execute each method in turn, stopping after the first method accepted
diff --git a/core/modules/openid/openid.module b/core/modules/openid/openid.module
index ed02891..5f1a184 100644
--- a/core/modules/openid/openid.module
+++ b/core/modules/openid/openid.module
@@ -408,7 +408,7 @@ function openid_complete($response = array()) {
 function openid_discovery($claimed_id) {
   module_load_include('inc', 'openid');
 
-  $methods = module_invoke_all('openid_discovery_method_info');
+  $methods = module_signal_all('openid_discovery_method_info');
   drupal_alter('openid_discovery_method_info', $methods);
 
   // Execute each method in turn and return first successful discovery.
diff --git a/core/modules/overlay/overlay.module b/core/modules/overlay/overlay.module
index 5433d3e..a825f2c 100644
--- a/core/modules/overlay/overlay.module
+++ b/core/modules/overlay/overlay.module
@@ -615,14 +615,14 @@ function overlay_set_mode($mode = NULL) {
       drupal_add_library('overlay', 'parent');
 
       // Allow modules to act upon overlay events.
-      module_invoke_all('overlay_parent_initialize');
+      module_signal_all('overlay_parent_initialize');
       break;
 
     case 'child':
       drupal_add_library('overlay', 'child');
 
       // Allow modules to act upon overlay events.
-      module_invoke_all('overlay_child_initialize');
+      module_signal_all('overlay_child_initialize');
       break;
   }
   return $overlay_mode;
diff --git a/core/modules/rdf/rdf.module b/core/modules/rdf/rdf.module
index 4eea417..0ba3fe0 100644
--- a/core/modules/rdf/rdf.module
+++ b/core/modules/rdf/rdf.module
@@ -95,7 +95,7 @@ function rdf_rdf_namespaces() {
  * hook_rdf_namespaces().
  */
 function rdf_get_namespaces() {
-  $rdf_namespaces = module_invoke_all('rdf_namespaces');
+  $rdf_namespaces = module_signal_all('rdf_namespaces');
   // module_invoke_all() uses array_merge_recursive() which might return nested
   // arrays if several modules redefine the same prefix multiple times. We need
   // to ensure the array of namespaces is flat and only contains strings as
diff --git a/core/modules/search/search.api.php b/core/modules/search/search.api.php
index 3f745bf..955ba86 100644
--- a/core/modules/search/search.api.php
+++ b/core/modules/search/search.api.php
@@ -145,7 +145,7 @@ function hook_search_admin() {
 
   // Note: reversed to reflect that higher number = higher ranking.
   $options = drupal_map_assoc(range(0, 10));
-  foreach (module_invoke_all('ranking') as $var => $values) {
+  foreach (module_signal_all('ranking') as $var => $values) {
     $form['content_ranking']['factors']['node_rank_' . $var] = array(
       '#title' => $values['title'],
       '#type' => 'select',
@@ -234,7 +234,7 @@ function hook_search_execute($keys = NULL, $conditions = NULL) {
     // Fetch terms for snippet.
     $node->rendered .= ' ' . module_invoke('taxonomy', 'node_update_index', $node);
 
-    $extra = module_invoke_all('node_search_result', $node);
+    $extra = module_invoke1_all('node_search_result', $node);
 
     $results[] = array(
       'link' => url('node/' . $item->sid, array('absolute' => TRUE)),
@@ -354,7 +354,7 @@ function hook_update_index() {
     $text = '<h1>' . check_plain($node->title) . '</h1>' . $node->rendered;
 
     // Fetch extra data normally not visible
-    $extra = module_invoke_all('node_update_index', $node);
+    $extra = module_invoke1_all('node_update_index', $node);
     foreach ($extra as $t) {
       $text .= $t;
     }
diff --git a/core/modules/search/search.module b/core/modules/search/search.module
index e731e4f..790e21d 100644
--- a/core/modules/search/search.module
+++ b/core/modules/search/search.module
@@ -315,7 +315,7 @@ function _search_menu_access($name) {
  */
 function search_reindex($sid = NULL, $module = NULL, $reindex = FALSE) {
   if ($module == NULL && $sid == NULL) {
-    module_invoke_all('search_reset');
+    module_signal_all('search_reset');
   }
   else {
     db_delete('search_dataset')
diff --git a/core/modules/search/search.test b/core/modules/search/search.test
index f121abd..be02813 100644
--- a/core/modules/search/search.test
+++ b/core/modules/search/search.test
@@ -409,7 +409,7 @@ class SearchRankingTestCase extends DrupalWebTestCase {
     }
 
     // Update the search index.
-    module_invoke_all('update_index');
+    module_signal_all('update_index');
     search_update_totals();
 
     // Refresh variables after the treatment.
@@ -477,7 +477,7 @@ class SearchRankingTestCase extends DrupalWebTestCase {
     }
 
     // Update the search index.
-    module_invoke_all('update_index');
+    module_signal_all('update_index');
     search_update_totals();
 
     // Refresh variables after the treatment.
@@ -507,7 +507,7 @@ class SearchRankingTestCase extends DrupalWebTestCase {
       $node = $this->drupalCreateNode($settings);
 
       // Update the search index.
-      module_invoke_all('update_index');
+      module_signal_all('update_index');
       search_update_totals();
 
       // Refresh variables after the treatment.
@@ -546,7 +546,7 @@ class SearchRankingTestCase extends DrupalWebTestCase {
     $node = $this->drupalCreateNode($settings);
 
     // Update the search index.
-    module_invoke_all('update_index');
+    module_signal_all('update_index');
     search_update_totals();
 
     // Refresh variables after the treatment.
@@ -682,7 +682,7 @@ class SearchExactTestCase extends DrupalWebTestCase {
     }
 
     // Update the search index.
-    module_invoke_all('update_index');
+    module_signal_all('update_index');
     search_update_totals();
 
     // Refresh variables after the treatment.
@@ -1978,7 +1978,7 @@ class SearchNodeAccessTest extends DrupalWebTestCase {
     $node = $this->drupalCreateNode(array('body' => array(LANGUAGE_NONE => array(array('value' => "The bunny's ears were fuzzy.")))));
 
     // Update the search index.
-    module_invoke_all('update_index');
+    module_signal_all('update_index');
     search_update_totals();
 
     // Refresh variables after the treatment.
diff --git a/core/modules/shortcut/shortcut.module b/core/modules/shortcut/shortcut.module
index f8ddcc2..fd3df8b 100644
--- a/core/modules/shortcut/shortcut.module
+++ b/core/modules/shortcut/shortcut.module
@@ -528,7 +528,7 @@ function shortcut_default_set($account = NULL) {
   // have one, we allow the last module which returns a valid result to take
   // precedence. If no module returns a valid set, fall back on the site-wide
   // default, which is the lowest-numbered shortcut set.
-  $suggestions = array_reverse(module_invoke_all('shortcut_default_set', $account));
+  $suggestions = array_reverse(module_invoke1_all('shortcut_default_set', $account));
   $suggestions[] = SHORTCUT_DEFAULT_SET_NAME;
   foreach ($suggestions as $name) {
     if ($shortcut_set = shortcut_set_load($name)) {
diff --git a/core/modules/simpletest/drupal_web_test_case.php b/core/modules/simpletest/drupal_web_test_case.php
index 9d993d4..6ec624c 100644
--- a/core/modules/simpletest/drupal_web_test_case.php
+++ b/core/modules/simpletest/drupal_web_test_case.php
@@ -1132,7 +1132,7 @@ class DrupalWebTestCase extends DrupalTestCase {
     $available = &drupal_static(__FUNCTION__);
 
     if (!isset($available) || $reset) {
-      $available = array_keys(module_invoke_all('permission'));
+      $available = array_keys(module_signal_all('permission'));
     }
 
     $valid = TRUE;
diff --git a/core/modules/simpletest/simpletest.module b/core/modules/simpletest/simpletest.module
index eb33d1b..afe51a8 100644
--- a/core/modules/simpletest/simpletest.module
+++ b/core/modules/simpletest/simpletest.module
@@ -148,7 +148,7 @@ function simpletest_run_tests($test_list, $reporter = 'drupal') {
   );
   batch_set($batch);
 
-  module_invoke_all('test_group_started');
+  module_signal_all('test_group_started');
 
   return $test_id;
 }
@@ -178,7 +178,7 @@ function _simpletest_batch_operation($test_list_init, $test_id, &$context) {
   $size = count($test_list);
   $info = $test->getInfo();
 
-  module_invoke_all('test_finished', $test->results);
+  module_invoke1_all('test_finished', $test->results);
 
   // Gather results and compose the report.
   $test_results[$test_class] = $test->results;
@@ -221,7 +221,7 @@ function _simpletest_batch_finished($success, $results, $operations, $elapsed) {
     drupal_set_message(t('The test run did not successfully finish.'), 'error');
     drupal_set_message(t('Use the <em>Clean environment</em> button to clean-up temporary files and tables.'), 'warning');
   }
-  module_invoke_all('test_group_finished');
+  module_signal_all('test_group_finished');
 }
 
 /**
diff --git a/core/modules/simpletest/tests/cache.test b/core/modules/simpletest/tests/cache.test
index 664247b..49f9fb6 100644
--- a/core/modules/simpletest/tests/cache.test
+++ b/core/modules/simpletest/tests/cache.test
@@ -320,7 +320,7 @@ class CacheClearCase extends CacheTestCase {
   function testFlushAllCaches() {
     // Create cache entries for each flushed cache bin.
     $bins = array('cache', 'filter', 'page', 'bootstrap', 'path');
-    $bins = array_merge(module_invoke_all('flush_caches'), $bins);
+    $bins = array_merge(module_signal_all('flush_caches'), $bins);
     foreach ($bins as $id => $bin) {
       $cid = 'test_cid_clear' . $id;
       cache($bin)->set($cid, $this->default_value);
diff --git a/core/modules/simpletest/tests/menu.test b/core/modules/simpletest/tests/menu.test
index d0612ac..d4e7bfd 100644
--- a/core/modules/simpletest/tests/menu.test
+++ b/core/modules/simpletest/tests/menu.test
@@ -1032,7 +1032,7 @@ class MenuBreadcrumbTestCase extends MenuWebTestCase {
     }
     $modules[] = 'menu_test';
     parent::setUp($modules);
-    $perms = array_keys(module_invoke_all('permission'));
+    $perms = array_keys(module_signal_all('permission'));
     $this->admin_user = $this->drupalCreateUser($perms);
     $this->drupalLogin($this->admin_user);
 
diff --git a/core/modules/simpletest/tests/module_test.module b/core/modules/simpletest/tests/module_test.module
index bd85049..b444017 100644
--- a/core/modules/simpletest/tests/module_test.module
+++ b/core/modules/simpletest/tests/module_test.module
@@ -99,7 +99,7 @@ function module_test_hook_dynamic_loading_invoke() {
  * return 'success!'.
  */
 function module_test_hook_dynamic_loading_invoke_all() {
-  $result = module_invoke_all('test_hook');
+  $result = module_signal_all('test_hook');
   return $result['module_test'];
 }
 
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index aa2f98f..e037ef5 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -2285,7 +2285,7 @@ function system_status($check = FALSE) {
   drupal_load_updates();
 
   // Check run-time requirements and status information.
-  $requirements = module_invoke_all('requirements', 'runtime');
+  $requirements = module_invoke1_all('requirements', 'runtime');
   usort($requirements, '_system_sort_requirements');
 
   if ($check) {
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index f4261e1..7153b2a 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -3006,7 +3006,7 @@ function system_cron() {
   }
 
   $core = array('cache', 'path', 'filter', 'page', 'form', 'menu');
-  $cache_bins = array_merge(module_invoke_all('flush_caches'), $core);
+  $cache_bins = array_merge(module_signal_all('flush_caches'), $core);
   foreach ($cache_bins as $bin) {
     cache($bin)->expire();
   }
@@ -3727,7 +3727,7 @@ function _system_date_formats_build() {
   }
 
   // Get formats supplied by various contrib modules.
-  $module_formats = module_invoke_all('date_formats');
+  $module_formats = module_signal_all('date_formats');
 
   foreach ($module_formats as $module_format) {
     // System types are locked.
diff --git a/core/modules/system/system.test b/core/modules/system/system.test
index 4e3761d..2f7b8e2 100644
--- a/core/modules/system/system.test
+++ b/core/modules/system/system.test
@@ -2355,7 +2355,7 @@ class SystemAdminTestCase extends DrupalWebTestCase {
     // Create an administrator with all permissions, as well as a regular user
     // who can only access administration pages and perform some Locale module
     // administrative tasks, but not all of them.
-    $this->admin_user = $this->drupalCreateUser(array_keys(module_invoke_all('permission')));
+    $this->admin_user = $this->drupalCreateUser(array_keys(module_signal_all('permission')));
     $this->web_user = $this->drupalCreateUser(array(
       'access administration pages',
       'translate interface',
diff --git a/core/modules/taxonomy/taxonomy.module b/core/modules/taxonomy/taxonomy.module
index eb20c26..9c9063d 100644
--- a/core/modules/taxonomy/taxonomy.module
+++ b/core/modules/taxonomy/taxonomy.module
@@ -417,7 +417,7 @@ function taxonomy_vocabulary_save($vocabulary) {
     $vocabulary->old_machine_name = $vocabulary->original->machine_name;
   }
 
-  module_invoke_all('taxonomy_vocabulary_presave', $vocabulary);
+  module_invoke1_all('taxonomy_vocabulary_presave', $vocabulary);
   module_invoke_all('entity_presave', $vocabulary, 'taxonomy_vocabulary');
 
   if (!empty($vocabulary->vid) && !empty($vocabulary->name)) {
@@ -425,13 +425,13 @@ function taxonomy_vocabulary_save($vocabulary) {
     if ($vocabulary->old_machine_name != $vocabulary->machine_name) {
       field_attach_rename_bundle('taxonomy_term', $vocabulary->old_machine_name, $vocabulary->machine_name);
     }
-    module_invoke_all('taxonomy_vocabulary_update', $vocabulary);
+    module_invoke1_all('taxonomy_vocabulary_update', $vocabulary);
     module_invoke_all('entity_update', $vocabulary, 'taxonomy_vocabulary');
   }
   elseif (empty($vocabulary->vid)) {
     $status = drupal_write_record('taxonomy_vocabulary', $vocabulary);
     field_attach_create_bundle('taxonomy_term', $vocabulary->machine_name);
-    module_invoke_all('taxonomy_vocabulary_insert', $vocabulary);
+    module_invoke1_all('taxonomy_vocabulary_insert', $vocabulary);
     module_invoke_all('entity_insert', $vocabulary, 'taxonomy_vocabulary');
   }
 
@@ -465,7 +465,7 @@ function taxonomy_vocabulary_delete($vid) {
       ->execute();
 
     field_attach_delete_bundle('taxonomy_term', $vocabulary->machine_name);
-    module_invoke_all('taxonomy_vocabulary_delete', $vocabulary);
+    module_invoke1_all('taxonomy_vocabulary_delete', $vocabulary);
     module_invoke_all('entity_delete', $vocabulary, 'taxonomy_vocabulary');
 
     cache_clear_all();
@@ -594,7 +594,7 @@ function taxonomy_term_save($term) {
   }
 
   field_attach_presave('taxonomy_term', $term);
-  module_invoke_all('taxonomy_term_presave', $term);
+  module_invoke1_all('taxonomy_term_presave', $term);
   module_invoke_all('entity_presave', $term, 'taxonomy_term');
 
   if (empty($term->tid)) {
@@ -687,7 +687,7 @@ function taxonomy_term_delete($tid) {
             ->execute();
 
           field_attach_delete('taxonomy_term', $term);
-          module_invoke_all('taxonomy_term_delete', $term);
+          module_invoke1_all('taxonomy_term_delete', $term);
           module_invoke_all('entity_delete', $term, 'taxonomy_term');
           taxonomy_terms_static_reset();
         }
diff --git a/core/modules/trigger/trigger.admin.inc b/core/modules/trigger/trigger.admin.inc
index 7509eb3..3a865fd 100644
--- a/core/modules/trigger/trigger.admin.inc
+++ b/core/modules/trigger/trigger.admin.inc
@@ -22,7 +22,7 @@ function trigger_assign($module_to_display = NULL) {
   }
 
   $build = array();
-  $trigger_info = module_invoke_all('trigger_info');
+  $trigger_info = module_signal_all('trigger_info');
   drupal_alter('trigger_info', $trigger_info);
   foreach ($trigger_info as $module => $hooks) {
     if ($module == $module_to_display) {
diff --git a/core/modules/trigger/trigger.module b/core/modules/trigger/trigger.module
index c0e516f..3907874 100644
--- a/core/modules/trigger/trigger.module
+++ b/core/modules/trigger/trigger.module
@@ -601,7 +601,7 @@ function _trigger_get_all_info() {
   $triggers = &drupal_static(__FUNCTION__);
 
   if (!isset($triggers)) {
-    $triggers = module_invoke_all('trigger_info');
+    $triggers = module_signal_all('trigger_info');
     drupal_alter('trigger_info', $triggers);
   }
 
diff --git a/core/modules/user/user.admin.inc b/core/modules/user/user.admin.inc
index 4789e7e..daf9839 100644
--- a/core/modules/user/user.admin.inc
+++ b/core/modules/user/user.admin.inc
@@ -177,7 +177,7 @@ function user_admin_account() {
     '#attributes' => array('class' => array('container-inline')),
   );
   $options = array();
-  foreach (module_invoke_all('user_operations') as $operation => $array) {
+  foreach (module_signal_all('user_operations') as $operation => $array) {
     $options[$operation] = $array['label'];
   }
   $form['options']['operation'] = array(
diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index abf7477..8a1bb68 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -2444,7 +2444,7 @@ function user_delete_multiple(array $uids) {
     $transaction = db_transaction();
     try {
       foreach ($accounts as $uid => $account) {
-        module_invoke_all('user_delete', $account);
+        module_invoke1_all('user_delete', $account);
         module_invoke_all('entity_delete', $account, 'user');
         field_attach_delete('user', $account);
         drupal_session_destroy_uid($account->uid);
@@ -2887,15 +2887,15 @@ function user_role_save($role) {
   }
 
   // Let modules modify the user role before it is saved to the database.
-  module_invoke_all('user_role_presave', $role);
+  module_invoke1_all('user_role_presave', $role);
 
   if (!empty($role->rid) && $role->name) {
     $status = drupal_write_record('role', $role, 'rid');
-    module_invoke_all('user_role_update', $role);
+    module_invoke1_all('user_role_update', $role);
   }
   else {
     $status = drupal_write_record('role', $role);
-    module_invoke_all('user_role_insert', $role);
+    module_invoke1_all('user_role_insert', $role);
   }
 
   // Clear the user access cache.
@@ -2930,7 +2930,7 @@ function user_role_delete($role) {
     ->condition('rid', $role->rid)
     ->execute();
 
-  module_invoke_all('user_role_delete', $role);
+  module_invoke1_all('user_role_delete', $role);
 
   // Clear the user access cache.
   drupal_static_reset('user_access');
diff --git a/core/modules/user/user.pages.inc b/core/modules/user/user.pages.inc
index 8239c53..458f094 100644
--- a/core/modules/user/user.pages.inc
+++ b/core/modules/user/user.pages.inc
@@ -169,7 +169,7 @@ function user_logout() {
 
   watchdog('user', 'Session closed for %name.', array('%name' => $user->name));
 
-  module_invoke_all('user_logout', $user);
+  module_invoke1_all('user_logout', $user);
 
   // Destroy the current session, and reset $user to the anonymous user.
   session_destroy();
diff --git a/core/update.php b/core/update.php
index d1a0940..80228f4 100644
--- a/core/update.php
+++ b/core/update.php
@@ -332,7 +332,7 @@ function update_extra_requirements($requirements = NULL) {
  */
 function update_check_requirements($skip_warnings = FALSE) {
   // Check requirements of all loaded modules.
-  $requirements = module_invoke_all('requirements', 'update');
+  $requirements = module_invoke1_all('requirements', 'update');
   $requirements += update_extra_requirements();
   $severity = drupal_requirements_severity($requirements);
 
diff --git a/core/xmlrpc.php b/core/xmlrpc.php
index 562aa81..dc02349 100644
--- a/core/xmlrpc.php
+++ b/core/xmlrpc.php
@@ -18,4 +18,4 @@ drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 include_once DRUPAL_ROOT . '/core/includes/xmlrpc.inc';
 include_once DRUPAL_ROOT . '/core/includes/xmlrpcs.inc';
 
-xmlrpc_server(module_invoke_all('xmlrpc'));
+xmlrpc_server(module_signal_all('xmlrpc'));
diff --git a/profiles/standard/standard.install b/profiles/standard/standard.install
index 5d44717..911da6e 100644
--- a/profiles/standard/standard.install
+++ b/profiles/standard/standard.install
@@ -397,7 +397,7 @@ function standard_install() {
   $admin_role->name = 'administrator';
   $admin_role->weight = 2;
   user_role_save($admin_role);
-  user_role_grant_permissions($admin_role->rid, array_keys(module_invoke_all('permission')));
+  user_role_grant_permissions($admin_role->rid, array_keys(module_signal_all('permission')));
   // Set this as the administrator role.
   variable_set('user_admin_role', $admin_role->rid);