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Message-ID: <89bba45c-d15c-88b7-0e32-9280cd4e4990@iogearbox.net>
Date: Mon, 13 Sep 2021 17:19:26 +0200
From: Daniel Borkmann <daniel@...earbox.net>
To: kernel test robot <lkp@...el.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, philip.li@...el.com,
alexei.starovoitov@...il.com, andrii@...nel.org
Subject: Re: [dborkman:pr/bpf-cgrp 2/4] include/linux/cgroup-defs.h:771:70:
warning: unused parameter 'skcd'
[ +Philip ]
On 9/11/21 2:38 AM, kernel test robot wrote:
> 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@...el.com>
>
> All warnings (new ones prefixed by >>):
Not sure how useful these warnings below are given it is quite conventional in the kernel
to have some static inline helper which e.g. look:
static inline int bla(struct foo *bar)
{
#ifdef CONFIG_<XYZ>
return ... /// do something with bar
#else
return 0;
#endif
}
I presume consensus here is to ignore these given also the gazillion other cases in the
kernel tree. In other words, goal on -Wunused-parameter for kernel would be to really
only catch cases where a parameter is indeed in all cases unused and should be removed
from the signature.
Thanks,
Daniel
> 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:
> ..
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