[libcamera-devel] [PATCH v2 5/6] media: entity: Add support for ancillary links

[kernel test robot]

Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on media-tree/master]
[also build test WARNING on v5.17-rc2 next-20220131]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Scally/Introduce-ancillary-links/20220131-080041
base:   git://linuxtv.org/media_tree.git master
reproduce: make htmldocs

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> include/media/media-entity.h:1126: warning: expecting prototype for media_entity_call(). Prototype was for media_create_ancillary_link() instead

vim +1126 include/media/media-entity.h

  1094	
  1095	/**
  1096	 * media_entity_call - Calls a struct media_entity_operations operation on
  1097	 *	an entity
  1098	 *
  1099	 * @entity: entity where the @operation will be called
  1100	 * @operation: type of the operation. Should be the name of a member of
  1101	 *	struct &media_entity_operations.
  1102	 *
  1103	 * This helper function will check if @operation is not %NULL. On such case,
  1104	 * it will issue a call to @operation\(@entity, @args\).
  1105	 */
  1106	
  1107	/**
  1108	 * media_create_ancillary_link() - create an ancillary link between two
  1109	 *				   instances of &media_entity
  1110	 *
  1111	 * @primary:	pointer to the primary &media_entity
  1112	 * @ancillary:	pointer to the ancillary &media_entity
  1113	 *
  1114	 * Create an ancillary link between two entities, indicating that they
  1115	 * represent two connected pieces of hardware that form a single logical unit.
  1116	 * A typical example is a camera lens being linked to the sensor that it is
  1117	 * supporting.
  1118	 *
  1119	 * The function sets both MEDIA_LNK_FL_ENABLED and MEDIA_LNK_FL_IMMUTABLE for
  1120	 * the new link. This behaviour may be subject to change in the future, so
  1121	 * userspace applications using ancillary links should ensure that ancillary
  1122	 * links are enabled when in use.
  1123	 */
  1124	struct media_link *
  1125	media_create_ancillary_link(struct media_entity *primary,
> 1126				    struct media_entity *ancillary);
  1127	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org