From: kernel test robot <lkp@intel.com>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: oe-kbuild-all@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Mike Rapoport (Microsoft)" <rppt@kernel.org>,
Christian Brauner <brauner@kernel.org>
Subject: [akpm-mm:mm-unstable 125/221] include/linux/compiler.h:166:45: warning: unused variable '__UNIQUE_ID_guard255'
Date: Sun, 24 Aug 2025 05:32:49 +0800 [thread overview]
Message-ID: <202508240502.frw1Krzo-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head: 3c3393d4b766eebdc475ea5bd6bbd3a221e2526e
commit: 98a7f4a3d2b1655e323e6943cf0203d0bd5a64eb [125/221] mm: update coredump logic to correctly use bitmap mm flags
config: arc-randconfig-r071-20250824 (https://download.01.org/0day-ci/archive/20250824/202508240502.frw1Krzo-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250824/202508240502.frw1Krzo-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508240502.frw1Krzo-lkp@intel.com/
All warnings (new ones prefixed by >>):
include/linux/sched/task.h: At top level:
include/linux/sched/task.h:99:41: warning: 'struct pid' declared inside parameter list will not be visible outside of this definition or declaration
99 | struct task_struct *copy_process(struct pid *pid, int trace, int node,
| ^~~
include/linux/sched/task.h: In function 'arch_thread_struct_whitelist':
include/linux/sched/task.h:178:40: error: invalid application of 'sizeof' to incomplete type 'struct task_struct'
178 | # define arch_task_struct_size (sizeof(struct task_struct))
| ^~~~~~
include/linux/sched/task.h:191:10: note: in expansion of macro 'arch_task_struct_size'
191 | *size = arch_task_struct_size - offsetof(struct task_struct, thread);
| ^~~~~~~~~~~~~~~~~~~~~
In file included from include/uapi/linux/posix_types.h:5,
from include/uapi/linux/types.h:14,
from include/linux/types.h:6,
from include/uapi/linux/sched.h:5,
from include/linux/sched.h:10,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/stddef.h:16:32: error: invalid use of undefined type 'struct task_struct'
16 | #define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
| ^~~~~~~~~~~~~~~~~~
include/linux/sched/task.h:191:34: note: in expansion of macro 'offsetof'
191 | *size = arch_task_struct_size - offsetof(struct task_struct, thread);
| ^~~~~~~~
In file included from include/linux/sched/user.h:9,
from include/linux/cred.h:18,
from include/linux/sched/signal.h:10,
from include/linux/rcuwait.h:6,
from include/linux/mm.h:36,
from arch/arc/include/asm/arcregs.h:149,
from arch/arc/include/asm/irqflags-compact.h:16,
from arch/arc/include/asm/irqflags.h:11,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/sched.h:37,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/ratelimit.h: In function 'ratelimit_state_init':
include/linux/ratelimit.h:14:2: error: implicit declaration of function 'raw_spin_lock_init' [-Werror=implicit-function-declaration]
14 | raw_spin_lock_init(&rs->lock);
| ^~~~~~~~~~~~~~~~~~
include/linux/ratelimit.h: In function 'ratelimit_state_reset_interval':
include/linux/ratelimit.h:44:2: error: implicit declaration of function 'raw_spin_lock_irqsave'; did you mean 'read_seqbegin_or_lock_irqsave'? [-Werror=implicit-function-declaration]
44 | raw_spin_lock_irqsave(&rs->lock, flags);
| ^~~~~~~~~~~~~~~~~~~~~
| read_seqbegin_or_lock_irqsave
include/linux/ratelimit.h:49:2: error: implicit declaration of function 'raw_spin_unlock_irqrestore'; did you mean 'write_sequnlock_irqrestore'? [-Werror=implicit-function-declaration]
49 | raw_spin_unlock_irqrestore(&rs->lock, flags);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
| write_sequnlock_irqrestore
In file included from include/linux/sched/signal.h:12,
from include/linux/rcuwait.h:6,
from include/linux/mm.h:36,
from arch/arc/include/asm/arcregs.h:149,
from arch/arc/include/asm/irqflags-compact.h:16,
from arch/arc/include/asm/irqflags.h:11,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/sched.h:37,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/pid.h: In function 'pid_alive':
include/linux/pid.h:267:10: error: dereferencing pointer to incomplete type 'const struct task_struct'
267 | return p->thread_pid != NULL;
| ^~
In file included from include/linux/preempt.h:11,
from include/linux/sched.h:15,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/hrtimer.h: In function 'hrtimer_update_function':
include/linux/cleanup.h:290:2: error: unknown type name 'class_raw_spinlock_irqsave_t'; did you mean 'class_local_lock_irqsave_t'?
290 | class_##_name##_t var __cleanup(class_##_name##_destructor) = \
| ^~~~~~
include/linux/cleanup.h:401:2: note: in expansion of macro 'CLASS'
401 | CLASS(_name, __UNIQUE_ID(guard))
| ^~~~~
include/linux/hrtimer.h:340:2: note: in expansion of macro 'guard'
340 | guard(raw_spinlock_irqsave)(&timer->base->cpu_base->lock);
| ^~~~~
In file included from include/linux/alarmtimer.h:6,
from include/linux/posix-timers.h:5,
from include/linux/sched/signal.h:13,
from include/linux/rcuwait.h:6,
from include/linux/mm.h:36,
from arch/arc/include/asm/arcregs.h:149,
from arch/arc/include/asm/irqflags-compact.h:16,
from arch/arc/include/asm/irqflags.h:11,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/sched.h:37,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/hrtimer.h:340:2: error: cleanup argument not a function
In file included from include/linux/preempt.h:11,
from include/linux/sched.h:15,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/cleanup.h:291:3: error: implicit declaration of function 'class_raw_spinlock_irqsave_constructor'; did you mean 'class_local_lock_irqsave_constructor'? [-Werror=implicit-function-declaration]
291 | class_##_name##_constructor
| ^~~~~~
include/linux/cleanup.h:401:2: note: in expansion of macro 'CLASS'
401 | CLASS(_name, __UNIQUE_ID(guard))
| ^~~~~
include/linux/hrtimer.h:340:2: note: in expansion of macro 'guard'
340 | guard(raw_spinlock_irqsave)(&timer->base->cpu_base->lock);
| ^~~~~
>> include/linux/compiler.h:166:45: warning: unused variable '__UNIQUE_ID_guard255' [-Wunused-variable]
166 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^~~~~~~~~~~~
include/linux/cleanup.h:290:20: note: in definition of macro 'CLASS'
290 | class_##_name##_t var __cleanup(class_##_name##_destructor) = \
| ^~~
include/linux/compiler_types.h:84:22: note: in expansion of macro '___PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^~~~~~~~
include/linux/compiler.h:166:29: note: in expansion of macro '__PASTE'
166 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^~~~~~~
include/linux/compiler_types.h:84:22: note: in expansion of macro '___PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^~~~~~~~
include/linux/compiler.h:166:37: note: in expansion of macro '__PASTE'
166 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^~~~~~~
include/linux/cleanup.h:401:15: note: in expansion of macro '__UNIQUE_ID'
401 | CLASS(_name, __UNIQUE_ID(guard))
| ^~~~~~~~~~~
include/linux/hrtimer.h:340:2: note: in expansion of macro 'guard'
340 | guard(raw_spinlock_irqsave)(&timer->base->cpu_base->lock);
| ^~~~~
In file included from include/linux/rbtree.h:24,
from include/linux/mm_types.h:11,
from include/linux/mmzone.h:22,
from include/linux/gfp.h:7,
from include/linux/mm.h:7,
from arch/arc/include/asm/arcregs.h:149,
from arch/arc/include/asm/irqflags-compact.h:16,
from arch/arc/include/asm/irqflags.h:11,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/sched.h:37,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/rcuref.h: In function '__rcuref_put':
include/linux/preempt.h:227:49: error: implicit declaration of function 'irqs_disabled' [-Werror=implicit-function-declaration]
227 | #define preemptible() (preempt_count() == 0 && !irqs_disabled())
| ^~~~~~~~~~~~~
include/linux/rcupdate.h:399:39: note: in definition of macro 'RCU_LOCKDEP_WARN'
399 | if (debug_lockdep_rcu_enabled() && (c) && \
| ^
include/linux/rcuref.h:103:44: note: in expansion of macro 'preemptible'
103 | RCU_LOCKDEP_WARN(!rcu_read_lock_held() && preemptible(),
| ^~~~~~~~~~~
In file included from include/linux/rcuwait.h:6,
from include/linux/mm.h:36,
from arch/arc/include/asm/arcregs.h:149,
from arch/arc/include/asm/irqflags-compact.h:16,
from arch/arc/include/asm/irqflags.h:11,
from include/linux/irqflags.h:18,
from include/linux/spinlock.h:59,
from include/linux/sched.h:37,
from arch/arc/kernel/asm-offsets.c:6:
include/linux/sched/signal.h: At top level:
include/linux/sched/signal.h:192:22: error: field 'prev_cputime' has incomplete type
192 | struct prev_cputime prev_cputime;
| ^~~~~~~~~~~~
include/linux/sched/signal.h:197:28: error: field 'ioac' has incomplete type
197 | struct task_io_accounting ioac;
| ^~~~
include/linux/sched/signal.h: In function 'kernel_signal_stop':
include/linux/sched/signal.h:302:3: error: implicit declaration of function 'set_special_state' [-Werror=implicit-function-declaration]
302 | set_special_state(TASK_STOPPED);
| ^~~~~~~~~~~~~~~~~
include/linux/sched/signal.h:302:21: error: 'TASK_STOPPED' undeclared (first use in this function); did you mean 'CLD_STOPPED'?
302 | set_special_state(TASK_STOPPED);
| ^~~~~~~~~~~~
| CLD_STOPPED
include/linux/sched/signal.h:306:2: error: implicit declaration of function 'schedule'; did you mean 'sched_exec'? [-Werror=implicit-function-declaration]
306 | schedule();
| ^~~~~~~~
| sched_exec
include/linux/sched/signal.h: In function '__set_notify_signal':
include/linux/sched/signal.h:357:10: error: implicit declaration of function 'test_and_set_tsk_thread_flag'; did you mean 'test_and_set_ti_thread_flag'? [-Werror=implicit-function-declaration]
357 | return !test_and_set_tsk_thread_flag(task, TIF_NOTIFY_SIGNAL) &&
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
| test_and_set_ti_thread_flag
include/linux/sched/signal.h:358:10: error: implicit declaration of function 'wake_up_state'; did you mean 'wake_up_sync'? [-Werror=implicit-function-declaration]
358 | !wake_up_state(task, TASK_INTERRUPTIBLE);
| ^~~~~~~~~~~~~
| wake_up_sync
include/linux/sched/signal.h:358:30: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function); did you mean 'FOLL_INTERRUPTIBLE'?
358 | !wake_up_state(task, TASK_INTERRUPTIBLE);
| ^~~~~~~~~~~~~~~~~~
| FOLL_INTERRUPTIBLE
include/linux/sched/signal.h: In function 'set_notify_signal':
include/linux/sched/signal.h:368:3: error: implicit declaration of function 'kick_process'; did you mean 'copy_process'? [-Werror=implicit-function-declaration]
368 | kick_process(task);
| ^~~~~~~~~~~~
| copy_process
include/linux/sched/signal.h: In function 'restart_syscall':
include/linux/sched/signal.h:373:2: error: implicit declaration of function 'set_tsk_thread_flag'; did you mean 'set_ti_thread_flag'? [-Werror=implicit-function-declaration]
373 | set_tsk_thread_flag(current, TIF_SIGPENDING);
| ^~~~~~~~~~~~~~~~~~~
| set_ti_thread_flag
In file included from arch/arc/include/asm/ptrace.h:11,
from arch/arc/include/asm/processor.h:16,
from include/linux/sched.h:13,
from arch/arc/kernel/asm-offsets.c:6:
vim +/__UNIQUE_ID_guard255 +166 include/linux/compiler.h
fe8c8a126806fe Cesar Eduardo Barros 2013-11-25 165
a8306f2d4dcea0 Nick Desaulniers 2023-08-31 @166 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
6f33d58794ef4c Rusty Russell 2012-11-22 167
:::::: The code at line 166 was first introduced by commit
:::::: a8306f2d4dcea03538c70c26d2948483f70254ff compiler.h: unify __UNIQUE_ID
:::::: TO: Nick Desaulniers <ndesaulniers@google.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2025-08-23 21:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-23 21:32 kernel test robot [this message]
2025-08-26 11:07 ` Lorenzo Stoakes
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