* [arnd-playground:randconfig-7.3-next 628/673] include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
@ 2026-09-25 21:07 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-09-25 21:07 UTC (permalink / raw)
To: Arnd Bergmann; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-7.3-next
head: 0a1affa74ef2f2c5c5ee74fc604e47a1aefdd286
commit: 5f609cf4ad6407b1967d07a8d6383a7edb182d45 [628/673] fixup clang __diag
config: s390-randconfig-2001-20260925 (https://download.01.org/0day-ci/archive/20260925/202609252035.roEHB44F-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 57e112ccb2a509c0e1d36963b187fccdd59566de)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260925/202609252035.roEHB44F-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/202609252035.roEHB44F-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from kernel/kcov.c:11:
In file included from include/linux/fs.h:5:
In file included from include/linux/fs/super.h:5:
In file included from include/linux/fs/super_types.h:13:
In file included from include/linux/percpu-rwsem.h:7:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/kcov.c:925:7: error: assigning to 'unsigned int' from incompatible type 'void'
925 | mode = context_unsafe(kcov->mode);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/kcov.c:925:30: warning: expression result unused [-Wunused-value]
925 | mode = context_unsafe(kcov->mode);
| ~~~~ ^~~~
1 warning and 2 errors generated.
--
>> lib/test_context-analysis.c:24:33: error: invalid operands to binary expression ('void' and 'int')
24 | BUILD_BUG_ON(context_unsafe(3) != 3); /* plain expression */
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
lib/test_context-analysis.c:25:42: error: invalid operands to binary expression ('void' and 'int')
25 | BUILD_BUG_ON(context_unsafe((void)2; 3) != 3); /* does not swallow semi-colon */
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
lib/test_context-analysis.c:26:42: error: invalid operands to binary expression ('void' and 'int')
26 | BUILD_BUG_ON(context_unsafe((void)2, 3) != 3); /* does not swallow commas */
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
>> lib/test_context-analysis.c:24:30: warning: expression result unused [-Wunused-value]
24 | BUILD_BUG_ON(context_unsafe(3) != 3); /* plain expression */
| ^
include/linux/compiler-context-analysis.h:218:2: note: expanded from macro 'context_unsafe'
218 | __VA_ARGS__; \
| ^~~~~~~~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
lib/test_context-analysis.c:25:39: warning: expression result unused [-Wunused-value]
25 | BUILD_BUG_ON(context_unsafe((void)2; 3) != 3); /* does not swallow semi-colon */
| ^
include/linux/compiler-context-analysis.h:218:2: note: expanded from macro 'context_unsafe'
218 | __VA_ARGS__; \
| ^~~~~~~~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
lib/test_context-analysis.c:26:39: warning: expression result unused [-Wunused-value]
26 | BUILD_BUG_ON(context_unsafe((void)2, 3) != 3); /* does not swallow commas */
| ^
include/linux/compiler-context-analysis.h:218:2: note: expanded from macro 'context_unsafe'
218 | __VA_ARGS__; \
| ^~~~~~~~~~~
include/linux/build_bug.h:51:19: note: expanded from macro 'BUILD_BUG_ON'
51 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~
include/linux/build_bug.h:40:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
40 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~
include/linux/compiler_types.h:705:22: note: expanded from macro 'compiletime_assert'
705 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~
include/linux/compiler_types.h:693:23: note: expanded from macro '_compiletime_assert'
693 | __compiletime_assert(condition, msg, prefix, suffix)
| ^~~~~~~~~
include/linux/compiler_types.h:685:9: note: expanded from macro '__compiletime_assert'
685 | if (!(condition)) \
| ^~~~~~~~~
lib/test_context-analysis.c:416:8: warning: expression result unused [-Wunused-value]
416 | (void)unrcu_pointer(d->data);
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:500:26: note: expanded from macro 'unrcu_pointer'
500 | #define unrcu_pointer(p) __unrcu_pointer(p, __UNIQUE_ID(rcu))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:491:3: note: expanded from macro '__unrcu_pointer'
487 | #define __unrcu_pointer(p, local) \
| ~
488 | context_unsafe( \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
489 | typeof(*p) *local = (typeof(*p) *__force)(p); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
490 | rcu_check_sparse(p, __rcu); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
491 | ((typeof(*p) __force __kernel *)(local)) \
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler-context-analysis.h:218:2: note: expanded from macro '\
context_unsafe'
218 | __VA_ARGS__; \
| ^~~~~~~~~~~
4 warnings and 3 errors generated.
--
In file included from lib/stackdepot.c:17:
In file included from include/linux/debugfs.h:15:
In file included from include/linux/fs.h:5:
In file included from include/linux/fs/super.h:5:
In file included from include/linux/fs/super_types.h:13:
In file included from include/linux/percpu-rwsem.h:7:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> lib/stackdepot.c:512:7: error: assigning to 'void *' from incompatible type 'void'
512 | pool = context_unsafe(stack_pools[pool_index]);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> lib/stackdepot.c:512:46: warning: expression result unused [-Wunused-value]
512 | pool = context_unsafe(stack_pools[pool_index]);
| ~~~~~~~~~~~ ~~~~~~~~~~^
1 warning and 2 errors generated.
--
In file included from lib/rhashtable.c:17:
In file included from include/linux/irq_work.h:6:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from lib/rhashtable.c:26:
>> include/linux/rhashtable.h:781:6: error: invalid argument type 'void' to unary expression
781 | if (unlikely(rcu_access_pointer(tbl->future_tbl))) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:77:40: note: expanded from macro 'unlikely'
77 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^~~~
>> lib/rhashtable.c:521:6: error: invalid argument type 'void' to unary expression
521 | if (likely(rcu_access_pointer(tbl->future_tbl)))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:76:38: note: expanded from macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^~~~
>> lib/rhashtable.c:643:3: error: statement requires expression of scalar type ('void' invalid)
643 | if (rcu_access_pointer(tbl->future_tbl))
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 errors generated.
--
In file included from crypto/authencesn.c:12:
In file included from include/crypto/internal/hash.h:12:
In file included from include/crypto/hash.h:12:
In file included from include/linux/scatterlist.h:8:
In file included from include/linux/mm.h:36:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
--
In file included from crypto/scompress.c:10:
In file included from include/crypto/internal/scompress.h:12:
In file included from include/crypto/internal/acompress.h:12:
In file included from include/crypto/acompress.h:18:
In file included from include/linux/scatterlist.h:8:
In file included from include/linux/mm.h:36:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> crypto/scompress.c:101:3: error: statement requires expression of scalar type ('void' invalid)
101 | if (context_unsafe(scratch->src))
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> crypto/scompress.c:101:31: warning: expression result unused [-Wunused-value]
101 | if (context_unsafe(scratch->src))
| ~~~~~~~~~^~~
include/linux/compiler-context-analysis.h:218:2: note: expanded from macro 'context_unsafe'
218 | __VA_ARGS__; \
| ^~~~~~~~~~~
1 warning and 2 errors generated.
--
In file included from block/fops.c:8:
In file included from include/linux/mm.h:36:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from block/fops.c:12:
In file included from include/linux/buffer_head.h:15:
>> include/linux/pagemap.h:179:7: error: assigning to 'void *' from incompatible type 'void'
179 | head = rcu_access_pointer(mapping->i_pages.xa_head);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
--
In file included from drivers/nvme/host/fc.c:6:
In file included from include/linux/module.h:20:
In file included from include/linux/elf.h:6:
In file included from arch/s390/include/asm/elf.h:173:
In file included from arch/s390/include/asm/mmu_context.h:11:
In file included from arch/s390/include/asm/pgalloc.h:18:
In file included from include/linux/mm.h:36:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/nvme/host/fc.c:13:
In file included from drivers/nvme/host/nvme.h:21:
In file included from include/trace/events/block.h:10:
In file included from include/linux/buffer_head.h:15:
>> include/linux/pagemap.h:179:7: error: assigning to 'void *' from incompatible type 'void'
179 | head = rcu_access_pointer(mapping->i_pages.xa_head);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/nvme/host/fc.c:18:
In file included from include/scsi/scsi_transport_fc.h:18:
>> include/scsi/scsi_host.h:793:9: error: returning 'void' from a function with incompatible result type 'enum scsi_host_state'
793 | return context_unsafe(READ_ONCE(shost->shost_state));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler-context-analysis.h:215:30: note: expanded from macro 'context_unsafe'
215 | #define context_unsafe(...) \
| ^
216 | ({ \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
217 | disable_context_analysis(); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
218 | __VA_ARGS__; \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
219 | enable_context_analysis() \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
220 | })
| ~~
3 errors generated.
--
In file included from drivers/nvme/host/multipath.c:6:
In file included from include/linux/backing-dev.h:13:
In file included from include/linux/fs.h:5:
In file included from include/linux/fs/super.h:5:
In file included from include/linux/fs/super_types.h:13:
In file included from include/linux/percpu-rwsem.h:7:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/nvme/host/multipath.c:9:
In file included from include/trace/events/block.h:10:
In file included from include/linux/buffer_head.h:15:
>> include/linux/pagemap.h:179:7: error: assigning to 'void *' from incompatible type 'void'
179 | head = rcu_access_pointer(mapping->i_pages.xa_head);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/nvme/host/multipath.c:249:10: error: invalid operands to binary expression ('struct nvme_ns *' and 'void')
249 | if (ns == rcu_access_pointer(head->current_path[node])) {
| ~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3 errors generated.
--
In file included from drivers/nvme/host/core.c:7:
In file included from include/linux/async.h:14:
In file included from include/linux/device.h:32:
In file included from include/linux/device/driver.h:21:
In file included from include/linux/module.h:20:
In file included from include/linux/elf.h:6:
In file included from arch/s390/include/asm/elf.h:173:
In file included from arch/s390/include/asm/mmu_context.h:11:
In file included from arch/s390/include/asm/pgalloc.h:18:
In file included from include/linux/mm.h:36:
>> include/linux/rcuwait.h:23:10: error: invalid argument type 'void' to unary expression
23 | return !!rcu_access_pointer(w->task);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/nvme/host/core.c:27:
In file included from drivers/nvme/host/nvme.h:21:
In file included from include/trace/events/block.h:10:
In file included from include/linux/buffer_head.h:15:
>> include/linux/pagemap.h:179:7: error: assigning to 'void *' from incompatible type 'void'
179 | head = rcu_access_pointer(mapping->i_pages.xa_head);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/nvme/host/core.c:3944:34: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
3944 | ret = dev_set_name(cdev_device, name);
| ^~~~
drivers/nvme/host/core.c:3944:34: note: treat the string as an argument to avoid this
3944 | ret = dev_set_name(cdev_device, name);
| ^
| "%s",
1 warning and 2 errors generated.
vim +/void +23 include/linux/rcuwait.h
8f95c90ceb541a Davidlohr Bueso 2017-01-11 16
191a43be61d679 Davidlohr Bueso 2020-04-23 17 /*
191a43be61d679 Davidlohr Bueso 2020-04-23 18 * Note: this provides no serialization and, just as with waitqueues,
191a43be61d679 Davidlohr Bueso 2020-04-23 19 * requires care to estimate as to whether or not the wait is active.
191a43be61d679 Davidlohr Bueso 2020-04-23 20 */
191a43be61d679 Davidlohr Bueso 2020-04-23 21 static inline int rcuwait_active(struct rcuwait *w)
191a43be61d679 Davidlohr Bueso 2020-04-23 22 {
febd668d375caf Paolo Bonzini 2020-05-18 @23 return !!rcu_access_pointer(w->task);
191a43be61d679 Davidlohr Bueso 2020-04-23 24 }
191a43be61d679 Davidlohr Bueso 2020-04-23 25
:::::: The code at line 23 was first introduced by commit
:::::: febd668d375caf13a7fcd93b3498366854de854a rcuwait: avoid lockdep splats from rcuwait_active()
:::::: TO: Paolo Bonzini <pbonzini@redhat.com>
:::::: CC: Paolo Bonzini <pbonzini@redhat.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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