tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git pr/bpf-cgrp
head:   5a6e78baee7515884b93a90c5d03db601bc9063a
commit: f36377d0c40cce0cdeaff50031c268bc640d94f0 [2/4] bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode
config: i386-randconfig-r032-20210910 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git/commit/?id=f36377d0c40cce0cdeaff50031c268bc640d94f0
        git remote add dborkman https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/bpf.git
        git fetch --no-tags dborkman pr/bpf-cgrp
        git checkout f36377d0c40cce0cdeaff50031c268bc640d94f0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   include/linux/bpf.h:770:61: warning: unused parameter 'prog' [-Wunused-parameter]
   static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
                                                               ^
   include/linux/bpf.h:771:32: warning: unused parameter 'tr' [-Wunused-parameter]
                                              struct bpf_trampoline *tr)
                                                                     ^
   include/linux/bpf.h:775:63: warning: unused parameter 'prog' [-Wunused-parameter]
   static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
                                                                 ^
   include/linux/bpf.h:776:34: warning: unused parameter 'tr' [-Wunused-parameter]
                                                struct bpf_trampoline *tr)
                                                                       ^
   include/linux/bpf.h:780:61: warning: unused parameter 'key' [-Wunused-parameter]
   static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
                                                               ^
   include/linux/bpf.h:781:39: warning: unused parameter 'tgt_info' [-Wunused-parameter]
                                                           struct bpf_attach_target_info *tgt_info)
                                                                                          ^
   include/linux/bpf.h:785:62: warning: unused parameter 'tr' [-Wunused-parameter]
   static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
                                                                ^
   include/linux/bpf.h:790:70: warning: unused parameter 'd' [-Wunused-parameter]
   static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
                                                                        ^
   include/linux/bpf.h:791:29: warning: unused parameter 'from' [-Wunused-parameter]
                                                 struct bpf_prog *from,
                                                                  ^
   include/linux/bpf.h:792:29: warning: unused parameter 'to' [-Wunused-parameter]
                                                 struct bpf_prog *to) {}
                                                                  ^
   include/linux/bpf.h:793:55: warning: unused parameter 'address' [-Wunused-parameter]
   static inline bool is_bpf_image_address(unsigned long address)
                                                         ^
   include/linux/bpf.h:1012:68: warning: unused parameter 'type_id' [-Wunused-parameter]
   static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
                                                                      ^
   include/linux/bpf.h:1016:52: warning: unused parameter 'btf' [-Wunused-parameter]
   static inline void bpf_struct_ops_init(struct btf *btf,
                                                      ^
   include/linux/bpf.h:1017:37: warning: unused parameter 'log' [-Wunused-parameter]
                                          struct bpf_verifier_log *log)
                                                                   ^
   include/linux/bpf.h:1020:51: warning: unused parameter 'data' [-Wunused-parameter]
   static inline bool bpf_try_module_get(const void *data, struct module *owner)
                                                     ^
   include/linux/bpf.h:1024:47: warning: unused parameter 'data' [-Wunused-parameter]
   static inline void bpf_module_put(const void *data, struct module *owner)
                                                 ^
   include/linux/bpf.h:1028:70: warning: unused parameter 'map' [-Wunused-parameter]
   static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
                                                                        ^
   include/linux/bpf.h:1029:18: warning: unused parameter 'key' [-Wunused-parameter]
                                                        void *key,
                                                              ^
   include/linux/bpf.h:1030:18: warning: unused parameter 'value' [-Wunused-parameter]
                                                        void *value)
                                                              ^
   include/linux/bpf.h:1407:44: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
                                              ^
   include/linux/bpf.h:1414:39: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
                                         ^
   include/linux/bpf.h:1420:44: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
                                              ^
   In file included from drivers/gpu/drm/i915/i915_drv.c:39:
   In file included from include/linux/vga_switcheroo.h:34:
   In file included from include/linux/fb.h:6:
   In file included from include/uapi/linux/fb.h:6:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:23:
   In file included from include/linux/psi_types.h:4:
   include/linux/kthread.h:218:72: warning: unused parameter 'css' [-Wunused-parameter]
   static inline void kthread_associate_blkcg(struct cgroup_subsys_state *css) { }
                                                                          ^
   In file included from drivers/gpu/drm/i915/i915_drv.c:39:
   In file included from include/linux/vga_switcheroo.h:34:
   In file included from include/linux/fb.h:6:
   In file included from include/uapi/linux/fb.h:6:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   include/linux/cgroup-defs.h:720:72: warning: unused parameter 'tsk' [-Wunused-parameter]
   static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
                                                                          ^
   include/linux/cgroup-defs.h:731:70: warning: unused parameter 'tsk' [-Wunused-parameter]
   static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
                                                                        ^
>> include/linux/cgroup-defs.h:771:70: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline u16 sock_cgroup_prioidx(const struct sock_cgroup_data *skcd)
                                                                        ^
   include/linux/cgroup-defs.h:780:70: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline u32 sock_cgroup_classid(const struct sock_cgroup_data *skcd)
                                                                        ^
   include/linux/cgroup-defs.h:789:69: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline void sock_cgroup_set_prioidx(struct sock_cgroup_data *skcd,
                                                                       ^
>> include/linux/cgroup-defs.h:790:13: warning: unused parameter 'prioidx' [-Wunused-parameter]
                                              u16 prioidx)
                                                  ^
   include/linux/cgroup-defs.h:797:69: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline void sock_cgroup_set_classid(struct sock_cgroup_data *skcd,
                                                                       ^
>> include/linux/cgroup-defs.h:798:13: warning: unused parameter 'classid' [-Wunused-parameter]
                                              u32 classid)
                                                  ^
   In file included from drivers/gpu/drm/i915/i915_drv.c:39:
   In file included from include/linux/vga_switcheroo.h:34:
   In file included from include/linux/fb.h:6:
   In file included from include/uapi/linux/fb.h:6:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:12:
   include/linux/backing-dev-defs.h:282:52: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline bool wb_tryget(struct bdi_writeback *wb)
                                                      ^
   include/linux/backing-dev-defs.h:287:49: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_get(struct bdi_writeback *wb)
                                                   ^
   include/linux/backing-dev-defs.h:291:49: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_put(struct bdi_writeback *wb)
                                                   ^
   include/linux/backing-dev-defs.h:295:54: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_put_many(struct bdi_writeback *wb, unsigned long nr)
                                                        ^
   include/linux/backing-dev-defs.h:295:72: warning: unused parameter 'nr' [-Wunused-parameter]
   static inline void wb_put_many(struct bdi_writeback *wb, unsigned long nr)
                                                                          ^
   include/linux/backing-dev-defs.h:299:51: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline bool wb_dying(struct bdi_writeback *wb)
                                                     ^
   In file included from drivers/gpu/drm/i915/i915_drv.c:39:
   In file included from include/linux/vga_switcheroo.h:34:
   In file included from include/linux/fb.h:6:
   In file included from include/uapi/linux/fb.h:6:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:13:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   In file included from arch/x86/include/asm/cacheflush.h:8:
   include/asm-generic/cacheflush.h:21:53: warning: unused parameter 'mm' [-Wunused-parameter]
   static inline void flush_cache_mm(struct mm_struct *mm)
                                                       ^
   include/asm-generic/cacheflush.h:27:57: warning: unused parameter 'mm' [-Wunused-parameter]
   static inline void flush_cache_dup_mm(struct mm_struct *mm)
                                                           ^
   include/asm-generic/cacheflush.h:33:61: warning: unused parameter 'vma' [-Wunused-parameter]
   static inline void flush_cache_range(struct vm_area_struct *vma,
                                                               ^
   include/asm-generic/cacheflush.h:34:24: warning: unused parameter 'start' [-Wunused-parameter]
                                        unsigned long start,
                                                      ^
   include/asm-generic/cacheflush.h:35:24: warning: unused parameter 'end' [-Wunused-parameter]
                                        unsigned long end)
                                                      ^
   include/asm-generic/cacheflush.h:41:60: warning: unused parameter 'vma' [-Wunused-parameter]
   static inline void flush_cache_page(struct vm_area_struct *vma,
                                                              ^
   include/asm-generic/cacheflush.h:42:23: warning: unused parameter 'vmaddr' [-Wunused-parameter]
                                       unsigned long vmaddr,
                                                     ^
   include/asm-generic/cacheflush.h:43:23: warning: unused parameter 'pfn' [-Wunused-parameter]
                                       unsigned long pfn)
                                                     ^
   include/asm-generic/cacheflush.h:49:51: warning: unused parameter 'page' [-Wunused-parameter]
   static inline void flush_dcache_page(struct page *page)
                                                     ^
   include/asm-generic/cacheflush.h:57:65: warning: unused parameter 'mapping' [-Wunused-parameter]
   static inline void flush_dcache_mmap_lock(struct address_space *mapping)
                                                                   ^
   include/asm-generic/cacheflush.h:63:67: warning: unused parameter 'mapping' [-Wunused-parameter]
   static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
                                                                     ^
   include/asm-generic/cacheflush.h:69:53: warning: unused parameter 'start' [-Wunused-parameter]
   static inline void flush_icache_range(unsigned long start, unsigned long end)
                                                       ^
   include/asm-generic/cacheflush.h:69:74: warning: unused parameter 'end' [-Wunused-parameter]
   static inline void flush_icache_range(unsigned long start, unsigned long end)
                                                                            ^
   include/asm-generic/cacheflush.h:79:61: warning: unused parameter 'vma' [-Wunused-parameter]
   static inline void flush_icache_page(struct vm_area_struct *vma,
                                                               ^
   include/asm-generic/cacheflush.h:80:23: warning: unused parameter 'page' [-Wunused-parameter]
                                        struct page *page)
                                                     ^
   include/asm-generic/cacheflush.h:86:66: warning: unused parameter 'vma' [-Wunused-parameter]
   static inline void flush_icache_user_page(struct vm_area_struct *vma,
                                                                    ^
   include/asm-generic/cacheflush.h:87:22: warning: unused parameter 'page' [-Wunused-parameter]
                                              struct page *page,
                                                           ^
   include/asm-generic/cacheflush.h:88:23: warning: unused parameter 'addr' [-Wunused-parameter]
                                              unsigned long addr, int len)
                                                            ^
   include/asm-generic/cacheflush.h:88:33: warning: unused parameter 'len' [-Wunused-parameter]
                                              unsigned long addr, int len)
--
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:22:
   In file included from include/linux/bpf-cgroup.h:5:
   include/linux/bpf.h:770:61: warning: unused parameter 'prog' [-Wunused-parameter]
   static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
                                                               ^
   include/linux/bpf.h:771:32: warning: unused parameter 'tr' [-Wunused-parameter]
                                              struct bpf_trampoline *tr)
                                                                     ^
   include/linux/bpf.h:775:63: warning: unused parameter 'prog' [-Wunused-parameter]
   static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
                                                                 ^
   include/linux/bpf.h:776:34: warning: unused parameter 'tr' [-Wunused-parameter]
                                                struct bpf_trampoline *tr)
                                                                       ^
   include/linux/bpf.h:780:61: warning: unused parameter 'key' [-Wunused-parameter]
   static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
                                                               ^
   include/linux/bpf.h:781:39: warning: unused parameter 'tgt_info' [-Wunused-parameter]
                                                           struct bpf_attach_target_info *tgt_info)
                                                                                          ^
   include/linux/bpf.h:785:62: warning: unused parameter 'tr' [-Wunused-parameter]
   static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
                                                                ^
   include/linux/bpf.h:790:70: warning: unused parameter 'd' [-Wunused-parameter]
   static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
                                                                        ^
   include/linux/bpf.h:791:29: warning: unused parameter 'from' [-Wunused-parameter]
                                                 struct bpf_prog *from,
                                                                  ^
   include/linux/bpf.h:792:29: warning: unused parameter 'to' [-Wunused-parameter]
                                                 struct bpf_prog *to) {}
                                                                  ^
   include/linux/bpf.h:793:55: warning: unused parameter 'address' [-Wunused-parameter]
   static inline bool is_bpf_image_address(unsigned long address)
                                                         ^
   include/linux/bpf.h:1012:68: warning: unused parameter 'type_id' [-Wunused-parameter]
   static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
                                                                      ^
   include/linux/bpf.h:1016:52: warning: unused parameter 'btf' [-Wunused-parameter]
   static inline void bpf_struct_ops_init(struct btf *btf,
                                                      ^
   include/linux/bpf.h:1017:37: warning: unused parameter 'log' [-Wunused-parameter]
                                          struct bpf_verifier_log *log)
                                                                   ^
   include/linux/bpf.h:1020:51: warning: unused parameter 'data' [-Wunused-parameter]
   static inline bool bpf_try_module_get(const void *data, struct module *owner)
                                                     ^
   include/linux/bpf.h:1024:47: warning: unused parameter 'data' [-Wunused-parameter]
   static inline void bpf_module_put(const void *data, struct module *owner)
                                                 ^
   include/linux/bpf.h:1028:70: warning: unused parameter 'map' [-Wunused-parameter]
   static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
                                                                        ^
   include/linux/bpf.h:1029:18: warning: unused parameter 'key' [-Wunused-parameter]
                                                        void *key,
                                                              ^
   include/linux/bpf.h:1030:18: warning: unused parameter 'value' [-Wunused-parameter]
                                                        void *value)
                                                              ^
   include/linux/bpf.h:1407:44: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
                                              ^
   include/linux/bpf.h:1414:39: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
                                         ^
   include/linux/bpf.h:1420:44: warning: unused parameter 'map' [-Wunused-parameter]
   bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
                                              ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   In file included from include/linux/cgroup-defs.h:23:
   In file included from include/linux/psi_types.h:4:
   include/linux/kthread.h:218:72: warning: unused parameter 'css' [-Wunused-parameter]
   static inline void kthread_associate_blkcg(struct cgroup_subsys_state *css) { }
                                                                          ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:28:
   include/linux/cgroup-defs.h:720:72: warning: unused parameter 'tsk' [-Wunused-parameter]
   static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
                                                                          ^
   include/linux/cgroup-defs.h:731:70: warning: unused parameter 'tsk' [-Wunused-parameter]
   static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
                                                                        ^
>> include/linux/cgroup-defs.h:771:70: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline u16 sock_cgroup_prioidx(const struct sock_cgroup_data *skcd)
                                                                        ^
   include/linux/cgroup-defs.h:780:70: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline u32 sock_cgroup_classid(const struct sock_cgroup_data *skcd)
                                                                        ^
   include/linux/cgroup-defs.h:789:69: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline void sock_cgroup_set_prioidx(struct sock_cgroup_data *skcd,
                                                                       ^
>> include/linux/cgroup-defs.h:790:13: warning: unused parameter 'prioidx' [-Wunused-parameter]
                                              u16 prioidx)
                                                  ^
   include/linux/cgroup-defs.h:797:69: warning: unused parameter 'skcd' [-Wunused-parameter]
   static inline void sock_cgroup_set_classid(struct sock_cgroup_data *skcd,
                                                                       ^
>> include/linux/cgroup-defs.h:798:13: warning: unused parameter 'classid' [-Wunused-parameter]
                                              u32 classid)
                                                  ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:12:
   include/linux/backing-dev-defs.h:282:52: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline bool wb_tryget(struct bdi_writeback *wb)
                                                      ^
   include/linux/backing-dev-defs.h:287:49: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_get(struct bdi_writeback *wb)
                                                   ^
   include/linux/backing-dev-defs.h:291:49: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_put(struct bdi_writeback *wb)
                                                   ^
   include/linux/backing-dev-defs.h:295:54: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline void wb_put_many(struct bdi_writeback *wb, unsigned long nr)
                                                        ^
   include/linux/backing-dev-defs.h:295:72: warning: unused parameter 'nr' [-Wunused-parameter]
   static inline void wb_put_many(struct bdi_writeback *wb, unsigned long nr)
                                                                          ^
   include/linux/backing-dev-defs.h:299:51: warning: unused parameter 'wb' [-Wunused-parameter]
   static inline bool wb_dying(struct bdi_writeback *wb)
                                                     ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:14:
   In file included from include/linux/blk-cgroup.h:23:
   In file included from include/linux/blkdev.h:8:
   include/linux/genhd.h:302:60: warning: unused parameter 'bdev' [-Wunused-parameter]
   static inline int bd_link_disk_holder(struct block_device *bdev,
                                                              ^
   include/linux/genhd.h:303:27: warning: unused parameter 'disk' [-Wunused-parameter]
                                         struct gendisk *disk)
                                                         ^
   include/linux/genhd.h:307:63: warning: unused parameter 'bdev' [-Wunused-parameter]
   static inline void bd_unlink_disk_holder(struct block_device *bdev,
                                                                 ^
   include/linux/genhd.h:308:23: warning: unused parameter 'disk' [-Wunused-parameter]
                                            struct gendisk *disk)
                                                            ^
   include/linux/genhd.h:311:63: warning: unused parameter 'disk' [-Wunused-parameter]
   static inline int bd_register_pending_holders(struct gendisk *disk)
                                                                 ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:14:
   In file included from include/linux/blk-cgroup.h:23:
   In file included from include/linux/blkdev.h:17:
   include/linux/bio.h:394:14: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
           if (sectors >= bio_sectors(bio))
               ~~~~~~~ ^  ~~~~~~~~~~~~~~~~
   include/linux/bio.h:516:51: warning: unused parameter 'bio' [-Wunused-parameter]
   static inline void bio_associate_blkg(struct bio *bio) { }
                                                     ^
   include/linux/bio.h:517:60: warning: unused parameter 'bio' [-Wunused-parameter]
   static inline void bio_associate_blkg_from_css(struct bio *bio,
                                                              ^
   include/linux/bio.h:518:41: warning: unused parameter 'css' [-Wunused-parameter]
                                                  struct cgroup_subsys_state *css)
                                                                              ^
   include/linux/bio.h:520:59: warning: unused parameter 'dst' [-Wunused-parameter]
   static inline void bio_clone_blkg_association(struct bio *dst,
                                                             ^
   include/linux/bio.h:521:24: warning: unused parameter 'src' [-Wunused-parameter]
                                                 struct bio *src) { }
                                                             ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
   In file included from include/linux/writeback.h:14:
   In file included from include/linux/blk-cgroup.h:23:
   include/linux/blkdev.h:866:58: warning: unused parameter 'rq' [-Wunused-parameter]
   static inline void rq_flush_dcache_pages(struct request *rq)
                                                            ^
   In file included from drivers/gpu/drm/i915/i915_config.c:6:
   In file included from drivers/gpu/drm/i915/i915_drv.h:39:
   In file included from include/linux/i2c.h:18:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:22:
..


vim +/skcd +771 include/linux/cgroup-defs.h

1ed1328792ff46 Tejun Heo       2015-09-16  712  
1ed1328792ff46 Tejun Heo       2015-09-16  713  /**
1ed1328792ff46 Tejun Heo       2015-09-16  714   * cgroup_threadgroup_change_begin - threadgroup exclusion for cgroups
1ed1328792ff46 Tejun Heo       2015-09-16  715   * @tsk: target task
1ed1328792ff46 Tejun Heo       2015-09-16  716   *
780de9dd2720de Ingo Molnar     2017-02-02  717   * Allows cgroup operations to synchronize against threadgroup changes
780de9dd2720de Ingo Molnar     2017-02-02  718   * using a percpu_rw_semaphore.
1ed1328792ff46 Tejun Heo       2015-09-16  719   */
1ed1328792ff46 Tejun Heo       2015-09-16 @720  static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
1ed1328792ff46 Tejun Heo       2015-09-16  721  {
1ed1328792ff46 Tejun Heo       2015-09-16  722  	percpu_down_read(&cgroup_threadgroup_rwsem);
1ed1328792ff46 Tejun Heo       2015-09-16  723  }
1ed1328792ff46 Tejun Heo       2015-09-16  724  
1ed1328792ff46 Tejun Heo       2015-09-16  725  /**
1ed1328792ff46 Tejun Heo       2015-09-16  726   * cgroup_threadgroup_change_end - threadgroup exclusion for cgroups
1ed1328792ff46 Tejun Heo       2015-09-16  727   * @tsk: target task
1ed1328792ff46 Tejun Heo       2015-09-16  728   *
780de9dd2720de Ingo Molnar     2017-02-02  729   * Counterpart of cgroup_threadcgroup_change_begin().
1ed1328792ff46 Tejun Heo       2015-09-16  730   */
1ed1328792ff46 Tejun Heo       2015-09-16  731  static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
1ed1328792ff46 Tejun Heo       2015-09-16  732  {
1ed1328792ff46 Tejun Heo       2015-09-16  733  	percpu_up_read(&cgroup_threadgroup_rwsem);
1ed1328792ff46 Tejun Heo       2015-09-16  734  }
7d7efec368d537 Tejun Heo       2015-05-13  735  
7d7efec368d537 Tejun Heo       2015-05-13  736  #else	/* CONFIG_CGROUPS */
7d7efec368d537 Tejun Heo       2015-05-13  737  
cb4a316752709b Aleksa Sarai    2015-06-06  738  #define CGROUP_SUBSYS_COUNT 0
cb4a316752709b Aleksa Sarai    2015-06-06  739  
780de9dd2720de Ingo Molnar     2017-02-02  740  static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
780de9dd2720de Ingo Molnar     2017-02-02  741  {
780de9dd2720de Ingo Molnar     2017-02-02  742  	might_sleep();
780de9dd2720de Ingo Molnar     2017-02-02  743  }
780de9dd2720de Ingo Molnar     2017-02-02  744  
7d7efec368d537 Tejun Heo       2015-05-13  745  static inline void cgroup_threadgroup_change_end(struct task_struct *tsk) {}
7d7efec368d537 Tejun Heo       2015-05-13  746  
b4a04ab7a37b49 Tejun Heo       2015-05-13  747  #endif	/* CONFIG_CGROUPS */
7d7efec368d537 Tejun Heo       2015-05-13  748  
2a56a1fec290bf Tejun Heo       2015-12-07  749  #ifdef CONFIG_SOCK_CGROUP_DATA
2a56a1fec290bf Tejun Heo       2015-12-07  750  
bd1060a1d67128 Tejun Heo       2015-12-07  751  /*
bd1060a1d67128 Tejun Heo       2015-12-07  752   * sock_cgroup_data is embedded at sock->sk_cgrp_data and contains
bd1060a1d67128 Tejun Heo       2015-12-07  753   * per-socket cgroup information except for memcg association.
bd1060a1d67128 Tejun Heo       2015-12-07  754   *
f36377d0c40cce Daniel Borkmann 2021-07-06  755   * On legacy hierarchies, net_prio and net_cls controllers directly
f36377d0c40cce Daniel Borkmann 2021-07-06  756   * set attributes on each sock which can then be tested by the network
f36377d0c40cce Daniel Borkmann 2021-07-06  757   * layer. On the default hierarchy, each sock is associated with the
f36377d0c40cce Daniel Borkmann 2021-07-06  758   * cgroup it was created in and the networking layer can match the
f36377d0c40cce Daniel Borkmann 2021-07-06  759   * cgroup directly.
bd1060a1d67128 Tejun Heo       2015-12-07  760   */
2a56a1fec290bf Tejun Heo       2015-12-07  761  struct sock_cgroup_data {
f36377d0c40cce Daniel Borkmann 2021-07-06  762  	struct cgroup	*cgroup; /* v2 */
f36377d0c40cce Daniel Borkmann 2021-07-06  763  #if defined(CONFIG_CGROUP_NET_CLASSID)
f36377d0c40cce Daniel Borkmann 2021-07-06  764  	u32		classid; /* v1 */
f36377d0c40cce Daniel Borkmann 2021-07-06  765  #endif
f36377d0c40cce Daniel Borkmann 2021-07-06  766  #if defined(CONFIG_CGROUP_NET_PRIO)
f36377d0c40cce Daniel Borkmann 2021-07-06  767  	u16		prioidx; /* v1 */
bd1060a1d67128 Tejun Heo       2015-12-07  768  #endif
2a56a1fec290bf Tejun Heo       2015-12-07  769  };
2a56a1fec290bf Tejun Heo       2015-12-07  770  
4dcb31d4649df3 Eric Dumazet    2018-03-14 @771  static inline u16 sock_cgroup_prioidx(const struct sock_cgroup_data *skcd)
2a56a1fec290bf Tejun Heo       2015-12-07  772  {
f36377d0c40cce Daniel Borkmann 2021-07-06  773  #if defined(CONFIG_CGROUP_NET_PRIO)
f36377d0c40cce Daniel Borkmann 2021-07-06  774  	return READ_ONCE(skcd->prioidx);
f36377d0c40cce Daniel Borkmann 2021-07-06  775  #else
f36377d0c40cce Daniel Borkmann 2021-07-06  776  	return 1;
f36377d0c40cce Daniel Borkmann 2021-07-06  777  #endif
2a56a1fec290bf Tejun Heo       2015-12-07  778  }
2a56a1fec290bf Tejun Heo       2015-12-07  779  
4dcb31d4649df3 Eric Dumazet    2018-03-14  780  static inline u32 sock_cgroup_classid(const struct sock_cgroup_data *skcd)
2a56a1fec290bf Tejun Heo       2015-12-07  781  {
f36377d0c40cce Daniel Borkmann 2021-07-06  782  #if defined(CONFIG_CGROUP_NET_CLASSID)
f36377d0c40cce Daniel Borkmann 2021-07-06  783  	return READ_ONCE(skcd->classid);
f36377d0c40cce Daniel Borkmann 2021-07-06  784  #else
f36377d0c40cce Daniel Borkmann 2021-07-06  785  	return 0;
f36377d0c40cce Daniel Borkmann 2021-07-06  786  #endif
2a56a1fec290bf Tejun Heo       2015-12-07  787  }
2a56a1fec290bf Tejun Heo       2015-12-07  788  
2a56a1fec290bf Tejun Heo       2015-12-07 @789  static inline void sock_cgroup_set_prioidx(struct sock_cgroup_data *skcd,
2a56a1fec290bf Tejun Heo       2015-12-07 @790  					   u16 prioidx)
2a56a1fec290bf Tejun Heo       2015-12-07  791  {
f36377d0c40cce Daniel Borkmann 2021-07-06  792  #if defined(CONFIG_CGROUP_NET_PRIO)
f36377d0c40cce Daniel Borkmann 2021-07-06  793  	WRITE_ONCE(skcd->prioidx, prioidx);
f36377d0c40cce Daniel Borkmann 2021-07-06  794  #endif
2a56a1fec290bf Tejun Heo       2015-12-07  795  }
2a56a1fec290bf Tejun Heo       2015-12-07  796  
2a56a1fec290bf Tejun Heo       2015-12-07  797  static inline void sock_cgroup_set_classid(struct sock_cgroup_data *skcd,
2a56a1fec290bf Tejun Heo       2015-12-07 @798  					   u32 classid)
2a56a1fec290bf Tejun Heo       2015-12-07  799  {
f36377d0c40cce Daniel Borkmann 2021-07-06  800  #if defined(CONFIG_CGROUP_NET_CLASSID)
f36377d0c40cce Daniel Borkmann 2021-07-06  801  	WRITE_ONCE(skcd->classid, classid);
f36377d0c40cce Daniel Borkmann 2021-07-06  802  #endif
2a56a1fec290bf Tejun Heo       2015-12-07  803  }
2a56a1fec290bf Tejun Heo       2015-12-07  804  

:::::: The code at line 771 was first introduced by commit
:::::: 4dcb31d4649df36297296b819437709f5407059c net: use skb_to_full_sk() in skb_update_prio()

:::::: TO: Eric Dumazet <edumazet@google.com>
:::::: CC: David S. Miller <davem@davemloft.net>

---
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