Re: [PATCH v2 1/1] ALSA: control: Use list_for_each_entry_safe()

From: kernel test robot
Date: Tue Aug 29 2023 - 15:57:01 EST

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Hi Andy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tiwai-sound/for-next]
[also build test WARNING on tiwai-sound/for-linus linus/master v6.5 next-20230829]
[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#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Andy-Shevchenko/ALSA-control-Use-list_for_each_entry_safe/20230829-222521
base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
patch link: https://lore.kernel.org/r/20230829142307.3916823-1-andriy.shevchenko%40linux.intel.com
patch subject: [PATCH v2 1/1] ALSA: control: Use list_for_each_entry_safe()
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230830/202308300312.Uq5j7oU2-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230830/202308300312.Uq5j7oU2-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308300312.Uq5j7oU2-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:25: error: invalid type argument of '->' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:21:23: note: in expansion of macro '__same_type'
21 | __same_type(*(ptr), void), \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:338:27: error: expression in static assertion is not an integer
338 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:47: error: invalid type argument of unary '*' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~
include/linux/container_of.h:23:11: note: in definition of macro 'container_of'
23 | ((type *)(__mptr - offsetof(type, member))); })
| ^~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/uapi/linux/posix_types.h:5,
from include/uapi/linux/types.h:14,
from include/linux/types.h:6,
from include/uapi/linux/sysinfo.h:5,
from include/uapi/linux/kernel.h:5,
from include/linux/cache.h:5,
from include/linux/slab.h:15:
include/linux/list.h:564:47: error: invalid type argument of unary '*' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~
include/linux/stddef.h:16:52: note: in definition of macro 'offsetof'
16 | #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
| ^~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/list.h:779:21: warning: left-hand operand of comma expression has no effect [-Wunused-value]
779 | pos = n, n = list_next_entry(n, member))
| ^
sound/core/control_led.c:304:17: note: in expansion of macro 'list_for_each_entry_safe'
304 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
sound/core/control_led.c: In function 'snd_ctl_led_reset':
include/linux/container_of.h:18:41: error: incompatible types when assigning to type 'struct snd_ctl_led_ctl' from type 'struct snd_ctl_led_ctl *'
18 | #define container_of(ptr, type, member) ({ \
| ^
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:777:21: note: in expansion of macro 'list_next_entry'
777 | n = list_next_entry(pos, member); \
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
sound/core/control_led.c:329:40: error: incompatible types when assigning to type 'struct snd_ctl_led_ctl *' from type 'struct snd_ctl_led_ctl'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~
include/linux/list.h:779:20: note: in definition of macro 'list_for_each_entry_safe'
779 | pos = n, n = list_next_entry(n, member))
| ^
include/linux/list.h:564:25: error: invalid type argument of '->' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~
include/linux/container_of.h:19:33: note: in definition of macro 'container_of'
19 | void *__mptr = (void *)(ptr); \
| ^~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:25: error: invalid type argument of '->' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:47: error: invalid type argument of unary '*' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:25: error: invalid type argument of '->' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:21:23: note: in expansion of macro '__same_type'
21 | __same_type(*(ptr), void), \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:338:27: error: expression in static assertion is not an integer
338 | #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:78:56: note: in definition of macro '__static_assert'
78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
include/linux/container_of.h:20:9: note: in expansion of macro 'static_assert'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~~~
include/linux/container_of.h:20:23: note: in expansion of macro '__same_type'
20 | static_assert(__same_type(*(ptr), ((type *)0)->member) || \
| ^~~~~~~~~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:47: error: invalid type argument of unary '*' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~
include/linux/container_of.h:23:11: note: in definition of macro 'container_of'
23 | ((type *)(__mptr - offsetof(type, member))); })
| ^~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:564:47: error: invalid type argument of unary '*' (have 'struct snd_ctl_led_ctl')
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~
include/linux/stddef.h:16:52: note: in definition of macro 'offsetof'
16 | #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
| ^~~~
include/linux/list.h:520:9: note: in expansion of macro 'container_of'
520 | container_of(ptr, type, member)
| ^~~~~~~~~~~~
include/linux/list.h:564:9: note: in expansion of macro 'list_entry'
564 | list_entry((pos)->member.next, typeof(*(pos)), member)
| ^~~~~~~~~~
include/linux/list.h:779:27: note: in expansion of macro 'list_next_entry'
779 | pos = n, n = list_next_entry(n, member))
| ^~~~~~~~~~~~~~~
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/list.h:779:21: warning: left-hand operand of comma expression has no effect [-Wunused-value]
779 | pos = n, n = list_next_entry(n, member))
| ^
sound/core/control_led.c:329:9: note: in expansion of macro 'list_for_each_entry_safe'
329 | list_for_each_entry_safe(lctl, _lctl, &led->controls, list)
| ^~~~~~~~~~~~~~~~~~~~~~~~

vim +779 include/linux/list.h

4d70c74659d974 Andy Shevchenko 2022-11-30 672
e130816164e244 Andy Shevchenko 2020-10-15 673 /**
e130816164e244 Andy Shevchenko 2020-10-15 674 * list_entry_is_head - test if the entry points to the head of the list
e130816164e244 Andy Shevchenko 2020-10-15 675 * @pos: the type * to cursor
e130816164e244 Andy Shevchenko 2020-10-15 676 * @head: the head for your list.
e130816164e244 Andy Shevchenko 2020-10-15 677 * @member: the name of the list_head within the struct.
e130816164e244 Andy Shevchenko 2020-10-15 678 */
e130816164e244 Andy Shevchenko 2020-10-15 679 #define list_entry_is_head(pos, head, member) \
e130816164e244 Andy Shevchenko 2020-10-15 680 (&pos->member == (head))
e130816164e244 Andy Shevchenko 2020-10-15 681
^1da177e4c3f41 Linus Torvalds 2005-04-16 682 /**
^1da177e4c3f41 Linus Torvalds 2005-04-16 683 * list_for_each_entry - iterate over list of given type
8e3a67a99231f9 Randy Dunlap 2006-06-25 684 * @pos: the type * to use as a loop cursor.
^1da177e4c3f41 Linus Torvalds 2005-04-16 685 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 686 * @member: the name of the list_head within the struct.
^1da177e4c3f41 Linus Torvalds 2005-04-16 687 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 688 #define list_for_each_entry(pos, head, member) \
93be3c2eb3371f Oleg Nesterov 2013-11-12 689 for (pos = list_first_entry(head, typeof(*pos), member); \
e130816164e244 Andy Shevchenko 2020-10-15 690 !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 691 pos = list_next_entry(pos, member))
^1da177e4c3f41 Linus Torvalds 2005-04-16 692
^1da177e4c3f41 Linus Torvalds 2005-04-16 693 /**
^1da177e4c3f41 Linus Torvalds 2005-04-16 694 * list_for_each_entry_reverse - iterate backwards over list of given type.
8e3a67a99231f9 Randy Dunlap 2006-06-25 695 * @pos: the type * to use as a loop cursor.
^1da177e4c3f41 Linus Torvalds 2005-04-16 696 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 697 * @member: the name of the list_head within the struct.
^1da177e4c3f41 Linus Torvalds 2005-04-16 698 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 699 #define list_for_each_entry_reverse(pos, head, member) \
93be3c2eb3371f Oleg Nesterov 2013-11-12 700 for (pos = list_last_entry(head, typeof(*pos), member); \
e130816164e244 Andy Shevchenko 2020-10-15 701 !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 702 pos = list_prev_entry(pos, member))
^1da177e4c3f41 Linus Torvalds 2005-04-16 703
^1da177e4c3f41 Linus Torvalds 2005-04-16 704 /**
72fd4a35a82433 Robert P. J. Day 2007-02-10 705 * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue()
^1da177e4c3f41 Linus Torvalds 2005-04-16 706 * @pos: the type * to use as a start point
^1da177e4c3f41 Linus Torvalds 2005-04-16 707 * @head: the head of the list
3943f42c11896c Andrey Utkin 2014-11-14 708 * @member: the name of the list_head within the struct.
fe96e57d77481c Randy Dunlap 2006-06-25 709 *
72fd4a35a82433 Robert P. J. Day 2007-02-10 710 * Prepares a pos entry for use as a start point in list_for_each_entry_continue().
^1da177e4c3f41 Linus Torvalds 2005-04-16 711 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 712 #define list_prepare_entry(pos, head, member) \
^1da177e4c3f41 Linus Torvalds 2005-04-16 713 ((pos) ? : list_entry(head, typeof(*pos), member))
^1da177e4c3f41 Linus Torvalds 2005-04-16 714
^1da177e4c3f41 Linus Torvalds 2005-04-16 715 /**
fe96e57d77481c Randy Dunlap 2006-06-25 716 * list_for_each_entry_continue - continue iteration over list of given type
8e3a67a99231f9 Randy Dunlap 2006-06-25 717 * @pos: the type * to use as a loop cursor.
^1da177e4c3f41 Linus Torvalds 2005-04-16 718 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 719 * @member: the name of the list_head within the struct.
fe96e57d77481c Randy Dunlap 2006-06-25 720 *
fe96e57d77481c Randy Dunlap 2006-06-25 721 * Continue to iterate over list of given type, continuing after
fe96e57d77481c Randy Dunlap 2006-06-25 722 * the current position.
^1da177e4c3f41 Linus Torvalds 2005-04-16 723 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 724 #define list_for_each_entry_continue(pos, head, member) \
8120e2e5141a42 Oleg Nesterov 2013-11-12 725 for (pos = list_next_entry(pos, member); \
e130816164e244 Andy Shevchenko 2020-10-15 726 !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 727 pos = list_next_entry(pos, member))
^1da177e4c3f41 Linus Torvalds 2005-04-16 728
768f3591e2b1cc Pavel Emelyanov 2007-09-18 729 /**
768f3591e2b1cc Pavel Emelyanov 2007-09-18 730 * list_for_each_entry_continue_reverse - iterate backwards from the given point
768f3591e2b1cc Pavel Emelyanov 2007-09-18 731 * @pos: the type * to use as a loop cursor.
768f3591e2b1cc Pavel Emelyanov 2007-09-18 732 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 733 * @member: the name of the list_head within the struct.
768f3591e2b1cc Pavel Emelyanov 2007-09-18 734 *
768f3591e2b1cc Pavel Emelyanov 2007-09-18 735 * Start to iterate over list of given type backwards, continuing after
768f3591e2b1cc Pavel Emelyanov 2007-09-18 736 * the current position.
768f3591e2b1cc Pavel Emelyanov 2007-09-18 737 */
768f3591e2b1cc Pavel Emelyanov 2007-09-18 738 #define list_for_each_entry_continue_reverse(pos, head, member) \
8120e2e5141a42 Oleg Nesterov 2013-11-12 739 for (pos = list_prev_entry(pos, member); \
e130816164e244 Andy Shevchenko 2020-10-15 740 !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 741 pos = list_prev_entry(pos, member))
768f3591e2b1cc Pavel Emelyanov 2007-09-18 742
e229c2fb3370a0 Arnaldo Carvalho de Melo 2006-03-20 743 /**
fe96e57d77481c Randy Dunlap 2006-06-25 744 * list_for_each_entry_from - iterate over list of given type from the current point
8e3a67a99231f9 Randy Dunlap 2006-06-25 745 * @pos: the type * to use as a loop cursor.
e229c2fb3370a0 Arnaldo Carvalho de Melo 2006-03-20 746 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 747 * @member: the name of the list_head within the struct.
fe96e57d77481c Randy Dunlap 2006-06-25 748 *
fe96e57d77481c Randy Dunlap 2006-06-25 749 * Iterate over list of given type, continuing from current position.
e229c2fb3370a0 Arnaldo Carvalho de Melo 2006-03-20 750 */
e229c2fb3370a0 Arnaldo Carvalho de Melo 2006-03-20 751 #define list_for_each_entry_from(pos, head, member) \
e130816164e244 Andy Shevchenko 2020-10-15 752 for (; !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 753 pos = list_next_entry(pos, member))
e229c2fb3370a0 Arnaldo Carvalho de Melo 2006-03-20 754
b862815c3ee7b4 Jiri Pirko 2017-02-03 755 /**
b862815c3ee7b4 Jiri Pirko 2017-02-03 756 * list_for_each_entry_from_reverse - iterate backwards over list of given type
b862815c3ee7b4 Jiri Pirko 2017-02-03 757 * from the current point
b862815c3ee7b4 Jiri Pirko 2017-02-03 758 * @pos: the type * to use as a loop cursor.
b862815c3ee7b4 Jiri Pirko 2017-02-03 759 * @head: the head for your list.
b862815c3ee7b4 Jiri Pirko 2017-02-03 760 * @member: the name of the list_head within the struct.
b862815c3ee7b4 Jiri Pirko 2017-02-03 761 *
b862815c3ee7b4 Jiri Pirko 2017-02-03 762 * Iterate backwards over list of given type, continuing from current position.
b862815c3ee7b4 Jiri Pirko 2017-02-03 763 */
b862815c3ee7b4 Jiri Pirko 2017-02-03 764 #define list_for_each_entry_from_reverse(pos, head, member) \
e130816164e244 Andy Shevchenko 2020-10-15 765 for (; !list_entry_is_head(pos, head, member); \
b862815c3ee7b4 Jiri Pirko 2017-02-03 766 pos = list_prev_entry(pos, member))
b862815c3ee7b4 Jiri Pirko 2017-02-03 767
^1da177e4c3f41 Linus Torvalds 2005-04-16 768 /**
^1da177e4c3f41 Linus Torvalds 2005-04-16 769 * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
8e3a67a99231f9 Randy Dunlap 2006-06-25 770 * @pos: the type * to use as a loop cursor.
^1da177e4c3f41 Linus Torvalds 2005-04-16 771 * @n: another type * to use as temporary storage
^1da177e4c3f41 Linus Torvalds 2005-04-16 772 * @head: the head for your list.
3943f42c11896c Andrey Utkin 2014-11-14 773 * @member: the name of the list_head within the struct.
^1da177e4c3f41 Linus Torvalds 2005-04-16 774 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 775 #define list_for_each_entry_safe(pos, n, head, member) \
93be3c2eb3371f Oleg Nesterov 2013-11-12 776 for (pos = list_first_entry(head, typeof(*pos), member), \
8120e2e5141a42 Oleg Nesterov 2013-11-12 777 n = list_next_entry(pos, member); \
e130816164e244 Andy Shevchenko 2020-10-15 778 !list_entry_is_head(pos, head, member); \
8120e2e5141a42 Oleg Nesterov 2013-11-12 @779 pos = n, n = list_next_entry(n, member))
^1da177e4c3f41 Linus Torvalds 2005-04-16 780

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