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Date: Fri, 16 Feb 2024 01:12:11 +0800
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev,
	"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/WFAMNAE-next20240215 1/1]
 include/linux/fs.h:1042:29: warning: 'used' attribute does not apply to
 types

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/WFAMNAE-next20240215
head:   34a5c90f36e0238bfc95cda9e2eccf7e610bff1a
commit: 34a5c90f36e0238bfc95cda9e2eccf7e610bff1a [1/1] treewide: Address -Wflexible-array-member-not-at-end warnings
config: arm-randconfig-004-20240215 (https://download.01.org/0day-ci/archive/20240216/202402160138.3DiZt3SO-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240216/202402160138.3DiZt3SO-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402160138.3DiZt3SO-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/io.h:9,
                    from arch/arm/mach-omap2/board-generic.c:11:
>> include/linux/fs.h:1042:29: warning: 'used' attribute does not apply to types [-Wattributes]
    1042 |         struct_group_tagged(file_handle_tag, __tag,
         |                             ^~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/fs.h:1042:9: note: in expansion of macro 'struct_group_tagged'
    1042 |         struct_group_tagged(file_handle_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/fs.h:1042:29: warning: 'section' attribute does not apply to types [-Wattributes]
    1042 |         struct_group_tagged(file_handle_tag, __tag,
         |                             ^~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/fs.h:1042:9: note: in expansion of macro 'struct_group_tagged'
    1042 |         struct_group_tagged(file_handle_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/fs.h:1042:9: note: in expansion of macro 'struct_group_tagged'
    1042 |         struct_group_tagged(file_handle_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/cgroup-defs.h:545:16: warning: 'used' attribute does not apply to types [-Wattributes]
     545 |         struct bpf_local_storage __rcu  *bpf_cgrp_storage;
         |                ^~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/cgroup-defs.h:545:16: warning: 'section' attribute does not apply to types [-Wattributes]
     545 |         struct bpf_local_storage __rcu  *bpf_cgrp_storage;
         |                ^~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:251,
                    from include/linux/array_size.h:5,
                    from include/linux/kernel.h:16,
                    from arch/arm/mm/init.c:7:
>> include/asm-generic/tlb.h:247:36: warning: 'used' attribute does not apply to types [-Wattributes]
     247 |                             struct mmu_gather_batch     *next;
         |                                    ^~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/asm-generic/tlb.h:247:36: warning: 'section' attribute does not apply to types [-Wattributes]
     247 |                             struct mmu_gather_batch     *next;
         |                                    ^~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:251,
                    from include/linux/build_bug.h:5,
                    from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/module.h:12,
                    from arch/arm/mm/mmu.c:7:
>> include/linux/cgroup-defs.h:545:16: warning: 'used' attribute does not apply to types [-Wattributes]
     545 |         struct bpf_local_storage __rcu  *bpf_cgrp_storage;
         |                ^~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/cgroup-defs.h:545:16: warning: 'section' attribute does not apply to types [-Wattributes]
     545 |         struct bpf_local_storage __rcu  *bpf_cgrp_storage;
         |                ^~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/cgroup-defs.h:398:9: note: in expansion of macro 'struct_group_tagged'
     398 |         struct_group_tagged(cgroup_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/asm-generic/tlb.h:247:36: warning: 'used' attribute does not apply to types [-Wattributes]
     247 |                             struct mmu_gather_batch     *next;
         |                                    ^~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/asm-generic/tlb.h:247:36: warning: 'section' attribute does not apply to types [-Wattributes]
     247 |                             struct mmu_gather_batch     *next;
         |                                    ^~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/asm-generic/tlb.h:246:9: note: in expansion of macro 'struct_group_tagged'
     246 |         struct_group_tagged(mmu_gather_batch_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:251,
                    from include/linux/array_size.h:5,
                    from include/linux/kernel.h:16,
                    from drivers/ata/libata-core.c:28:
>> include/linux/types.h:239:18: warning: 'used' attribute does not apply to types [-Wattributes]
     239 | #define rcu_head callback_head
         |                  ^~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/bpf.h:1963:9: note: in expansion of macro 'struct_group_tagged'
    1963 |         struct_group_tagged(bpf_prog_array_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:1964:16: note: in expansion of macro 'rcu_head'
    1964 |         struct rcu_head rcu;
         |                ^~~~~~~~
>> include/linux/types.h:239:18: warning: 'section' attribute does not apply to types [-Wattributes]
     239 | #define rcu_head callback_head
         |                  ^~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:30: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                              ^~~~~~~
   include/linux/bpf.h:1963:9: note: in expansion of macro 'struct_group_tagged'
    1963 |         struct_group_tagged(bpf_prog_array_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:1964:16: note: in expansion of macro 'rcu_head'
    1964 |         struct rcu_head rcu;
         |                ^~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/bpf.h:1963:9: note: in expansion of macro 'struct_group_tagged'
    1963 |         struct_group_tagged(bpf_prog_array_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/perf_event.h:124:29: warning: 'used' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/perf_event.h:124:29: warning: 'section' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/uapi/linux/sched.h:5,
                    from include/linux/sched.h:10,
                    from include/linux/sched/task_stack.h:9,
                    from kernel/trace/trace_stack.c:6:
>> include/linux/perf_event.h:124:29: warning: 'used' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/perf_event.h:124:29: warning: 'section' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/stddef.h:5,
                    from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:251,
                    from include/linux/export.h:5,
                    from include/linux/linkage.h:7,
                    from arch/arm/include/asm/bug.h:5,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/mm.h:6,
                    from include/linux/ring_buffer.h:5,
                    from kernel/trace/trace.c:15:
>> include/linux/perf_event.h:124:29: warning: 'used' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/linux/perf_event.h:124:29: warning: 'section' attribute does not apply to types [-Wattributes]
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |                             ^~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/stddef.h:29:24: note: in definition of macro '__struct_group'
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                        ^~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
>> include/uapi/linux/stddef.h:29:50: warning: declaration does not declare anything
      29 |                 struct TAG { MEMBERS } ATTRS NAME; \
         |                                                  ^
   include/linux/stddef.h:81:9: note: in expansion of macro '__struct_group'
      81 |         __struct_group(TAG, NAME, /* no attrs */, MEMBERS)
         |         ^~~~~~~~~~~~~~
   include/linux/perf_event.h:124:9: note: in expansion of macro 'struct_group_tagged'
     124 |         struct_group_tagged(perf_branch_stack_tag, __tag,
         |         ^~~~~~~~~~~~~~~~~~~
   In file included from kernel/trace/trace.c:8979:
   kernel/trace/trace_selftest.c: In function 'trace_selftest_function_regs':
   kernel/trace/trace_selftest.c:605:13: warning: variable 'len' set but not used [-Wunused-but-set-variable]
     605 |         int len;
         |             ^~~


vim +/used +1042 include/linux/fs.h

   991	
   992	/*
   993	 * f_{lock,count,pos_lock} members can be highly contended and share
   994	 * the same cacheline. f_{lock,mode} are very frequently used together
   995	 * and so share the same cacheline as well. The read-mostly
   996	 * f_{path,inode,op} are kept on a separate cacheline.
   997	 */
   998	struct file {
   999		union {
  1000			/* fput() uses task work when closing and freeing file (default). */
  1001			struct callback_head 	f_task_work;
  1002			/* fput() must use workqueue (most kernel threads). */
  1003			struct llist_node	f_llist;
  1004			unsigned int 		f_iocb_flags;
  1005		};
  1006	
  1007		/*
  1008		 * Protects f_ep, f_flags.
  1009		 * Must not be taken from IRQ context.
  1010		 */
  1011		spinlock_t		f_lock;
  1012		fmode_t			f_mode;
  1013		atomic_long_t		f_count;
  1014		struct mutex		f_pos_lock;
  1015		loff_t			f_pos;
  1016		unsigned int		f_flags;
  1017		struct fown_struct	f_owner;
  1018		const struct cred	*f_cred;
  1019		struct file_ra_state	f_ra;
  1020		struct path		f_path;
  1021		struct inode		*f_inode;	/* cached value */
  1022		const struct file_operations	*f_op;
  1023	
  1024		u64			f_version;
  1025	#ifdef CONFIG_SECURITY
  1026		void			*f_security;
  1027	#endif
  1028		/* needed for tty driver, and maybe others */
  1029		void			*private_data;
  1030	
  1031	#ifdef CONFIG_EPOLL
  1032		/* Used by fs/eventpoll.c to link all the hooks to this file */
  1033		struct hlist_head	*f_ep;
  1034	#endif /* #ifdef CONFIG_EPOLL */
  1035		struct address_space	*f_mapping;
  1036		errseq_t		f_wb_err;
  1037		errseq_t		f_sb_err; /* for syncfs */
  1038	} __randomize_layout
  1039	  __attribute__((aligned(4)));	/* lest something weird decides that 2 is OK */
  1040	
  1041	struct file_handle {
> 1042		struct_group_tagged(file_handle_tag, __tag,
  1043				    __u32 handle_bytes;
  1044				    int handle_type;
  1045				    /* file identifier */
  1046		);
  1047		unsigned char f_handle[];
  1048	};
  1049	

-- 
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https://github.com/intel/lkp-tests/wiki

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