[gustavoars:testing/WFAMNAE-next20240215 1/1] include/linux/fs.h:1042:29: warning: 'used' attribute does not apply to types

From: kernel test robot
Date: Thu Feb 15 2024 - 12:13:38 EST

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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@xxxxxxxxx/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@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402160138.3DiZt3SO-lkp@xxxxxxxxx/

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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