sched: fix warning in bandwidth distribution

  We've observed the following warning being hit in
distribute_cfs_runtime():
	SCHED_WARN_ON(cfs_rq->runtime_remaining > 0)

We have the following race:

- cpu0: running bandwidth distribution (distribute_cfs_runtime).
  Inspects the local cfs_rq and makes its runtime_remaining positive.
  However, we defer unthrottling the local cfs_rq until after
  considering all remote cfs_rq's.
- cpu1: starts running bandwidth distribution from the slack timer. When
  it finds the cfs_rq for cpu 0 on the throttled list, it observers the
  that the cfs_rq is throttled, yet is not on the CSD list, and has a
  positive runtime_remaining, thus triggering the warning in
  distribute_cfs_runtime.

To fix this, we can rework the local unthrottling logic to put the local
cfs_rq on a local list, so that any future bandwidth distributions will
realize that the cfs_rq is about to be unthrottled.

Signed-off-by: Josh Don <joshdon@google.com>
---
 kernel/sched/fair.c | 36 +++++++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 11 deletions(-)
  

Hi Josh,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on tip/master tip/auto-latest linus/master v6.6-rc2 next-20230920]
[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/Josh-Don/sched-fix-warning-in-bandwidth-distribution/20230920-080712
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/20230920000559.3872416-1-joshdon%40google.com
patch subject: [PATCH] sched: fix warning in bandwidth distribution
config: arm-bcm2835_defconfig (https://download.01.org/0day-ci/archive/20230921/202309210339.XihTnzE3-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230921/202309210339.XihTnzE3-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309210339.XihTnzE3-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/sched/fair.c: In function 'distribute_cfs_runtime':
   kernel/sched/fair.c:5808:56: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5808 |                                 list_add_tail(&cfs_rq->throttled_csd_list,
         |                                                        ^~~~~~~~~~~~~~~~~~
         |                                                        throttled_list
   In file included from include/linux/container_of.h:5,
                    from include/linux/kernel.h:21,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:612:9: note: in expansion of macro 'list_entry'
     612 |         list_entry((ptr)->next, type, member)
         |         ^~~~~~~~~~
   include/linux/list.h:857:20: note: in expansion of macro 'list_first_entry'
     857 |         for (pos = list_first_entry(head, typeof(*pos), member),        \
         |                    ^~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/compiler_types.h:366:27: error: expression in static assertion is not an integer
     366 | #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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:612:9: note: in expansion of macro 'list_entry'
     612 |         list_entry((ptr)->next, type, member)
         |         ^~~~~~~~~~
   include/linux/list.h:857:20: note: in expansion of macro 'list_first_entry'
     857 |         for (pos = list_first_entry(head, typeof(*pos), member),        \
         |                    ^~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   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/linux/limits.h:6,
                    from include/linux/kernel.h:16,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/stddef.h:16:58: note: in definition of macro 'offsetof'
      16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
         |                                                          ^~~~~~
   include/linux/list.h:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:612:9: note: in expansion of macro 'list_entry'
     612 |         list_entry((ptr)->next, type, member)
         |         ^~~~~~~~~~
   include/linux/list.h:857:20: note: in expansion of macro 'list_first_entry'
     857 |         for (pos = list_first_entry(head, typeof(*pos), member),        \
         |                    ^~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/kernel.h:21,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/container_of.h:19:33: note: in definition of macro 'container_of'
      19 |         void *__mptr = (void *)(ptr);                                   \
         |                                 ^~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/container_of.h:5,
                    from include/linux/kernel.h:21,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/compiler_types.h:366:27: error: expression in static assertion is not an integer
     366 | #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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   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/linux/limits.h:6,
                    from include/linux/kernel.h:16,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/stddef.h:16:58: note: in definition of macro 'offsetof'
      16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
         |                                                          ^~~~~~
   include/linux/list.h:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:858:21: note: in expansion of macro 'list_next_entry'
     858 |                 n = list_next_entry(pos, member);                       \
         |                     ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/rculist.h:10,
                    from include/linux/pid.h:5,
                    from include/linux/sched.h:14,
                    from include/linux/ratelimit.h:6,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from include/linux/energy_model.h:5,
                    from kernel/sched/fair.c:23:
   include/linux/list.h:857:64: warning: left-hand operand of comma expression has no effect [-Wunused-value]
     857 |         for (pos = list_first_entry(head, typeof(*pos), member),        \
         |                                                                ^
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/list.h:761:16: note: in definition of macro 'list_entry_is_head'
     761 |         (&pos->member == (head))
         |                ^~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/kernel.h:21,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/container_of.h:19:33: note: in definition of macro 'container_of'
      19 |         void *__mptr = (void *)(ptr);                                   \
         |                                 ^~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/container_of.h:5,
                    from include/linux/kernel.h:21,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/compiler_types.h:366:27: error: expression in static assertion is not an integer
     366 | #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:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   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/linux/limits.h:6,
                    from include/linux/kernel.h:16,
                    from include/linux/cpumask.h:10,
                    from include/linux/energy_model.h:4,
                    from kernel/sched/fair.c:23:
   kernel/sched/fair.c:5820:34: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5820 |                                  throttled_csd_list) {
         |                                  ^~~~~~~~~~~~~~~~~~
   include/linux/stddef.h:16:58: note: in definition of macro 'offsetof'
      16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
         |                                                          ^~~~~~
   include/linux/list.h:601:9: note: in expansion of macro 'container_of'
     601 |         container_of(ptr, type, member)
         |         ^~~~~~~~~~~~
   include/linux/list.h:645:9: note: in expansion of macro 'list_entry'
     645 |         list_entry((pos)->member.next, typeof(*(pos)), member)
         |         ^~~~~~~~~~
   include/linux/list.h:860:27: note: in expansion of macro 'list_next_entry'
     860 |              pos = n, n = list_next_entry(n, member))
         |                           ^~~~~~~~~~~~~~~
   kernel/sched/fair.c:5819:9: note: in expansion of macro 'list_for_each_entry_safe'
    5819 |         list_for_each_entry_safe(cfs_rq, tmp, &local_unthrottle,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:5825:40: error: 'struct cfs_rq' has no member named 'throttled_csd_list'; did you mean 'throttled_list'?
    5825 |                 list_del_init(&cfs_rq->throttled_csd_list);
         |                                        ^~~~~~~~~~~~~~~~~~
         |                                        throttled_list


vim +366 include/linux/compiler_types.h

eb111869301e15 Rasmus Villemoes 2019-09-13  364  
d15155824c5014 Will Deacon      2017-10-24  365  /* Are two types/vars the same type (ignoring qualifiers)? */
d15155824c5014 Will Deacon      2017-10-24 @366  #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
d15155824c5014 Will Deacon      2017-10-24  367