Re: [PATCH] drm/omap: Replace list_for_each with list_for_each_entry

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Hi Harsha,

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.14-rc5 next-20171013]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Harsha-Sharma/drm-omap-Replace-list_for_each-with-list_for_each_entry/20171017-014028
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/linkage.h:4:0,
                    from include/linux/kernel.h:6,
                    from drivers/gpu//drm/omapdrm/dss/display.c:25:
   drivers/gpu//drm/omapdrm/dss/display.c: In function 'omapdss_register_display':
>> include/linux/list.h:463:43: error: dereferencing pointer to incomplete type 'struct omp_dss_device'
     for (pos = list_first_entry(head, typeof(*pos), member); \
                                               
   include/linux/compiler.h:553:19: note: in definition of macro '__compiletime_assert'
      bool __cond = !(condition);    \
                      ^~~~~~~~~
   include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:870:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
     ^~~~~~~~~~~~~~~~
   include/linux/kernel.h:870:20: note: in expansion of macro '__same_type'
     BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
                       ^~~~~~~~~~~
>> include/linux/list.h:365:2: note: in expansion of macro 'container_of'
     container_of(ptr, type, member)
     ^~~~~~~~~~~~
>> include/linux/list.h:376:2: note: in expansion of macro 'list_entry'
     list_entry((ptr)->next, type, member)
     ^~~~~~~~~~
>> include/linux/list.h:463:13: note: in expansion of macro 'list_first_entry'
     for (pos = list_first_entry(head, typeof(*pos), member); \
                ^~~~~~~~~~~~~~~~
>> drivers/gpu//drm/omapdrm/dss/display.c:71:2: note: in expansion of macro 'list_for_each_entry'
     list_for_each_entry(ldev, &panel_list, panel_list)
     ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/linkage.h:4:0,
                    from include/linux/kernel.h:6,
                    from drivers/gpu/drm/omapdrm/dss/display.c:25:
   drivers/gpu/drm/omapdrm/dss/display.c: In function 'omapdss_register_display':
>> include/linux/list.h:463:43: error: dereferencing pointer to incomplete type 'struct omp_dss_device'
     for (pos = list_first_entry(head, typeof(*pos), member); \
                                               
   include/linux/compiler.h:553:19: note: in definition of macro '__compiletime_assert'
      bool __cond = !(condition);    \
                      ^~~~~~~~~
   include/linux/compiler.h:576:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:46:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:870:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
     ^~~~~~~~~~~~~~~~
   include/linux/kernel.h:870:20: note: in expansion of macro '__same_type'
     BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
                       ^~~~~~~~~~~
>> include/linux/list.h:365:2: note: in expansion of macro 'container_of'
     container_of(ptr, type, member)
     ^~~~~~~~~~~~
>> include/linux/list.h:376:2: note: in expansion of macro 'list_entry'
     list_entry((ptr)->next, type, member)
     ^~~~~~~~~~
>> include/linux/list.h:463:13: note: in expansion of macro 'list_first_entry'
     for (pos = list_first_entry(head, typeof(*pos), member); \
                ^~~~~~~~~~~~~~~~
   drivers/gpu/drm/omapdrm/dss/display.c:71:2: note: in expansion of macro 'list_for_each_entry'
     list_for_each_entry(ldev, &panel_list, panel_list)
     ^~~~~~~~~~~~~~~~~~~

vim +463 include/linux/list.h

^1da177e Linus Torvalds  2005-04-16  357  
^1da177e Linus Torvalds  2005-04-16  358  /**
^1da177e Linus Torvalds  2005-04-16  359   * list_entry - get the struct for this entry
^1da177e Linus Torvalds  2005-04-16  360   * @ptr:	the &struct list_head pointer.
^1da177e Linus Torvalds  2005-04-16  361   * @type:	the type of the struct this is embedded in.
3943f42c Andrey Utkin    2014-11-14  362   * @member:	the name of the list_head within the struct.
^1da177e Linus Torvalds  2005-04-16  363   */
^1da177e Linus Torvalds  2005-04-16  364  #define list_entry(ptr, type, member) \
^1da177e Linus Torvalds  2005-04-16 @365  	container_of(ptr, type, member)
^1da177e Linus Torvalds  2005-04-16  366  
^1da177e Linus Torvalds  2005-04-16  367  /**
b5e61818 Pavel Emelianov 2007-05-08  368   * list_first_entry - get the first element from a list
b5e61818 Pavel Emelianov 2007-05-08  369   * @ptr:	the list head to take the element from.
b5e61818 Pavel Emelianov 2007-05-08  370   * @type:	the type of the struct this is embedded in.
3943f42c Andrey Utkin    2014-11-14  371   * @member:	the name of the list_head within the struct.
b5e61818 Pavel Emelianov 2007-05-08  372   *
b5e61818 Pavel Emelianov 2007-05-08  373   * Note, that list is expected to be not empty.
b5e61818 Pavel Emelianov 2007-05-08  374   */
b5e61818 Pavel Emelianov 2007-05-08  375  #define list_first_entry(ptr, type, member) \
b5e61818 Pavel Emelianov 2007-05-08 @376  	list_entry((ptr)->next, type, member)
b5e61818 Pavel Emelianov 2007-05-08  377  
b5e61818 Pavel Emelianov 2007-05-08  378  /**
93be3c2e Oleg Nesterov   2013-11-12  379   * list_last_entry - get the last element from a list
93be3c2e Oleg Nesterov   2013-11-12  380   * @ptr:	the list head to take the element from.
93be3c2e Oleg Nesterov   2013-11-12  381   * @type:	the type of the struct this is embedded in.
3943f42c Andrey Utkin    2014-11-14  382   * @member:	the name of the list_head within the struct.
93be3c2e Oleg Nesterov   2013-11-12  383   *
93be3c2e Oleg Nesterov   2013-11-12  384   * Note, that list is expected to be not empty.
93be3c2e Oleg Nesterov   2013-11-12  385   */
93be3c2e Oleg Nesterov   2013-11-12  386  #define list_last_entry(ptr, type, member) \
93be3c2e Oleg Nesterov   2013-11-12  387  	list_entry((ptr)->prev, type, member)
93be3c2e Oleg Nesterov   2013-11-12  388  
93be3c2e Oleg Nesterov   2013-11-12  389  /**
6d7581e6 Jiri Pirko      2013-05-29  390   * list_first_entry_or_null - get the first element from a list
6d7581e6 Jiri Pirko      2013-05-29  391   * @ptr:	the list head to take the element from.
6d7581e6 Jiri Pirko      2013-05-29  392   * @type:	the type of the struct this is embedded in.
3943f42c Andrey Utkin    2014-11-14  393   * @member:	the name of the list_head within the struct.
6d7581e6 Jiri Pirko      2013-05-29  394   *
6d7581e6 Jiri Pirko      2013-05-29  395   * Note that if the list is empty, it returns NULL.
6d7581e6 Jiri Pirko      2013-05-29  396   */
12adfd88 Chris Wilson    2016-07-23  397  #define list_first_entry_or_null(ptr, type, member) ({ \
12adfd88 Chris Wilson    2016-07-23  398  	struct list_head *head__ = (ptr); \
12adfd88 Chris Wilson    2016-07-23  399  	struct list_head *pos__ = READ_ONCE(head__->next); \
12adfd88 Chris Wilson    2016-07-23  400  	pos__ != head__ ? list_entry(pos__, type, member) : NULL; \
12adfd88 Chris Wilson    2016-07-23  401  })
6d7581e6 Jiri Pirko      2013-05-29  402  
6d7581e6 Jiri Pirko      2013-05-29  403  /**
008208c6 Oleg Nesterov   2013-11-12  404   * list_next_entry - get the next element in list
008208c6 Oleg Nesterov   2013-11-12  405   * @pos:	the type * to cursor
3943f42c Andrey Utkin    2014-11-14  406   * @member:	the name of the list_head within the struct.
008208c6 Oleg Nesterov   2013-11-12  407   */
008208c6 Oleg Nesterov   2013-11-12  408  #define list_next_entry(pos, member) \
008208c6 Oleg Nesterov   2013-11-12  409  	list_entry((pos)->member.next, typeof(*(pos)), member)
008208c6 Oleg Nesterov   2013-11-12  410  
008208c6 Oleg Nesterov   2013-11-12  411  /**
008208c6 Oleg Nesterov   2013-11-12  412   * list_prev_entry - get the prev element in list
008208c6 Oleg Nesterov   2013-11-12  413   * @pos:	the type * to cursor
3943f42c Andrey Utkin    2014-11-14  414   * @member:	the name of the list_head within the struct.
008208c6 Oleg Nesterov   2013-11-12  415   */
008208c6 Oleg Nesterov   2013-11-12  416  #define list_prev_entry(pos, member) \
008208c6 Oleg Nesterov   2013-11-12  417  	list_entry((pos)->member.prev, typeof(*(pos)), member)
008208c6 Oleg Nesterov   2013-11-12  418  
008208c6 Oleg Nesterov   2013-11-12  419  /**
^1da177e Linus Torvalds  2005-04-16  420   * list_for_each	-	iterate over a list
8e3a67a9 Randy Dunlap    2006-06-25  421   * @pos:	the &struct list_head to use as a loop cursor.
^1da177e Linus Torvalds  2005-04-16  422   * @head:	the head for your list.
^1da177e Linus Torvalds  2005-04-16  423   */
^1da177e Linus Torvalds  2005-04-16  424  #define list_for_each(pos, head) \
e66eed65 Linus Torvalds  2011-05-19  425  	for (pos = (head)->next; pos != (head); pos = pos->next)
^1da177e Linus Torvalds  2005-04-16  426  
^1da177e Linus Torvalds  2005-04-16  427  /**
^1da177e Linus Torvalds  2005-04-16  428   * list_for_each_prev	-	iterate over a list backwards
8e3a67a9 Randy Dunlap    2006-06-25  429   * @pos:	the &struct list_head to use as a loop cursor.
^1da177e Linus Torvalds  2005-04-16  430   * @head:	the head for your list.
^1da177e Linus Torvalds  2005-04-16  431   */
^1da177e Linus Torvalds  2005-04-16  432  #define list_for_each_prev(pos, head) \
e66eed65 Linus Torvalds  2011-05-19  433  	for (pos = (head)->prev; pos != (head); pos = pos->prev)
^1da177e Linus Torvalds  2005-04-16  434  
^1da177e Linus Torvalds  2005-04-16  435  /**
^1da177e Linus Torvalds  2005-04-16  436   * list_for_each_safe - iterate over a list safe against removal of list entry
8e3a67a9 Randy Dunlap    2006-06-25  437   * @pos:	the &struct list_head to use as a loop cursor.
^1da177e Linus Torvalds  2005-04-16  438   * @n:		another &struct list_head to use as temporary storage
^1da177e Linus Torvalds  2005-04-16  439   * @head:	the head for your list.
^1da177e Linus Torvalds  2005-04-16  440   */
^1da177e Linus Torvalds  2005-04-16  441  #define list_for_each_safe(pos, n, head) \
^1da177e Linus Torvalds  2005-04-16  442  	for (pos = (head)->next, n = pos->next; pos != (head); \
^1da177e Linus Torvalds  2005-04-16  443  		pos = n, n = pos->next)
^1da177e Linus Torvalds  2005-04-16  444  
^1da177e Linus Torvalds  2005-04-16  445  /**
8f731f7d Randy Dunlap    2007-10-18  446   * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
37c42524 Denis V. Lunev  2007-10-16  447   * @pos:	the &struct list_head to use as a loop cursor.
37c42524 Denis V. Lunev  2007-10-16  448   * @n:		another &struct list_head to use as temporary storage
37c42524 Denis V. Lunev  2007-10-16  449   * @head:	the head for your list.
37c42524 Denis V. Lunev  2007-10-16  450   */
37c42524 Denis V. Lunev  2007-10-16  451  #define list_for_each_prev_safe(pos, n, head) \
37c42524 Denis V. Lunev  2007-10-16  452  	for (pos = (head)->prev, n = pos->prev; \
e66eed65 Linus Torvalds  2011-05-19  453  	     pos != (head); \
37c42524 Denis V. Lunev  2007-10-16  454  	     pos = n, n = pos->prev)
37c42524 Denis V. Lunev  2007-10-16  455  
37c42524 Denis V. Lunev  2007-10-16  456  /**
^1da177e Linus Torvalds  2005-04-16  457   * list_for_each_entry	-	iterate over list of given type
8e3a67a9 Randy Dunlap    2006-06-25  458   * @pos:	the type * to use as a loop cursor.
^1da177e Linus Torvalds  2005-04-16  459   * @head:	the head for your list.
3943f42c Andrey Utkin    2014-11-14  460   * @member:	the name of the list_head within the struct.
^1da177e Linus Torvalds  2005-04-16  461   */
^1da177e Linus Torvalds  2005-04-16  462  #define list_for_each_entry(pos, head, member)				\
93be3c2e Oleg Nesterov   2013-11-12 @463  	for (pos = list_first_entry(head, typeof(*pos), member);	\
e66eed65 Linus Torvalds  2011-05-19  464  	     &pos->member != (head);					\
8120e2e5 Oleg Nesterov   2013-11-12  465  	     pos = list_next_entry(pos, member))
^1da177e Linus Torvalds  2005-04-16  466  

:::::: The code at line 463 was first introduced by commit
:::::: 93be3c2eb3371f022ad88acf1ab6bee8e3c38378 list: introduce list_last_entry(), use list_{first,last}_entry()

:::::: TO: Oleg Nesterov <oleg@xxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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