* [daveh-devel:kss-2026-10-19 16/24] include/linux/thread_info.h:237:20: error: redefinition of 'arch_kernel_shstk_enabled'
@ 2026-10-20 8:01 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-10-20 8:01 UTC (permalink / raw)
To: Dave Hansen; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git kss-2026-10-19
head: b28e7d03a8472efab137c77cbb5dd666fa08e9a7
commit: 967449663fb3eb7dcca67c4652293712530809c8 [16/24] arch-shadow-stacks-enabled
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20261020/202610200912.3obIPJfU-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261020/202610200912.3obIPJfU-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/202610200912.3obIPJfU-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
In file included from include/linux/thread_info.h:62:
arch/x86/include/asm/thread_info.h:237:6: warning: no previous prototype for function 'arch_kernel_shstk_enabled' [-Wmissing-prototypes]
237 | bool arch_kernel_shstk_enabled(void)
| ^
arch/x86/include/asm/thread_info.h:237:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
237 | bool arch_kernel_shstk_enabled(void)
| ^
| static
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:23: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/compiler_attributes.h:165:56: note: expanded from macro '__gnu_inline'
165 | #define __gnu_inline __attribute__((__gnu_inline__))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:36: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/compiler_types.h:257:31: note: expanded from macro '__inline_maybe_unused'
257 | #define __inline_maybe_unused __maybe_unused
| ^
include/linux/compiler_attributes.h:352:56: note: expanded from macro '__maybe_unused'
352 | #define __maybe_unused __attribute__((__unused__))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:58: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
arch/x86/include/asm/linkage.h:9:32: note: expanded from macro 'notrace'
9 | #define notrace __attribute__((no_instrument_function))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
>> include/linux/thread_info.h:237:20: error: redefinition of 'arch_kernel_shstk_enabled'
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
99 | set->sig[1] | set->sig[0]) == 0;
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
101 | return (set->sig[1] | set->sig[0]) == 0;
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
vim +/arch_kernel_shstk_enabled +237 include/linux/thread_info.h
e66101020b3651 Dave Hansen 2026-10-19 235
5daba193b8cf42 Dave Hansen 2026-10-19 236 #ifndef arch_kernel_shstk_enabled
5daba193b8cf42 Dave Hansen 2026-10-19 @237 static inline bool arch_kernel_shstk_enabled(void)
5daba193b8cf42 Dave Hansen 2026-10-19 238 {
5daba193b8cf42 Dave Hansen 2026-10-19 239 return false;
5daba193b8cf42 Dave Hansen 2026-10-19 240 }
5daba193b8cf42 Dave Hansen 2026-10-19 241 #endif
5daba193b8cf42 Dave Hansen 2026-10-19 242
:::::: The code at line 237 was first introduced by commit
:::::: 5daba193b8cf422043348d59ff40fbda09a528d7 kernel/task: Add "runtime" check for shadow stack support
:::::: TO: Dave Hansen <dave.hansen@linux.intel.com>
:::::: CC: Dave Hansen <dave.hansen@intel.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread* [daveh-devel:kss-2026-10-19 16/24] include/linux/thread_info.h:237:20: error: redefinition of 'arch_kernel_shstk_enabled'
@ 2026-10-20 16:52 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-10-20 16:52 UTC (permalink / raw)
To: Dave Hansen; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git kss-2026-10-19
head: b28e7d03a8472efab137c77cbb5dd666fa08e9a7
commit: 967449663fb3eb7dcca67c4652293712530809c8 [16/24] arch-shadow-stacks-enabled
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20261020/202610201825.xLWRqhn5-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261020/202610201825.xLWRqhn5-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/202610201825.xLWRqhn5-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
In file included from include/linux/thread_info.h:62:
>> arch/x86/include/asm/thread_info.h:237:6: warning: no previous prototype for function 'arch_kernel_shstk_enabled' [-Wmissing-prototypes]
237 | bool arch_kernel_shstk_enabled(void)
| ^
arch/x86/include/asm/thread_info.h:237:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
237 | bool arch_kernel_shstk_enabled(void)
| ^
| static
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
>> include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:23: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/compiler_attributes.h:165:56: note: expanded from macro '__gnu_inline'
165 | #define __gnu_inline __attribute__((__gnu_inline__))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
>> include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:36: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
include/linux/compiler_types.h:257:31: note: expanded from macro '__inline_maybe_unused'
257 | #define __inline_maybe_unused __maybe_unused
| ^
include/linux/compiler_attributes.h:352:56: note: expanded from macro '__maybe_unused'
352 | #define __maybe_unused __attribute__((__unused__))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
>> include/linux/thread_info.h:237:8: warning: attribute declaration must precede definition [-Wignored-attributes]
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
include/linux/compiler_types.h:235:58: note: expanded from macro 'inline'
235 | #define inline inline __gnu_inline __inline_maybe_unused notrace
| ^
arch/x86/include/asm/linkage.h:9:32: note: expanded from macro 'notrace'
9 | #define notrace __attribute__((no_instrument_function))
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:15:
In file included from include/linux/completion.h:12:
In file included from include/linux/swait.h:7:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/interrupt_rc.h:17:
In file included from include/linux/smp.h:118:
>> include/linux/thread_info.h:237:20: error: redefinition of 'arch_kernel_shstk_enabled'
237 | static inline bool arch_kernel_shstk_enabled(void)
| ^
arch/x86/include/asm/thread_info.h:237:6: note: previous definition is here
237 | bool arch_kernel_shstk_enabled(void)
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
99 | set->sig[1] | set->sig[0]) == 0;
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
101 | return (set->sig[1] | set->sig[0]) == 0;
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kernel/asm-offsets.c:14:
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:17:
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:
In file included from include/linux/rcuwait.h:6:
vim +/arch_kernel_shstk_enabled +237 include/linux/thread_info.h
e66101020b3651 Dave Hansen 2026-10-19 235
5daba193b8cf42 Dave Hansen 2026-10-19 236 #ifndef arch_kernel_shstk_enabled
5daba193b8cf42 Dave Hansen 2026-10-19 @237 static inline bool arch_kernel_shstk_enabled(void)
5daba193b8cf42 Dave Hansen 2026-10-19 238 {
5daba193b8cf42 Dave Hansen 2026-10-19 239 return false;
5daba193b8cf42 Dave Hansen 2026-10-19 240 }
5daba193b8cf42 Dave Hansen 2026-10-19 241 #endif
5daba193b8cf42 Dave Hansen 2026-10-19 242
:::::: The code at line 237 was first introduced by commit
:::::: 5daba193b8cf422043348d59ff40fbda09a528d7 kernel/task: Add "runtime" check for shadow stack support
:::::: TO: Dave Hansen <dave.hansen@linux.intel.com>
:::::: CC: Dave Hansen <dave.hansen@intel.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-10-20 8:01 [daveh-devel:kss-2026-10-19 16/24] include/linux/thread_info.h:237:20: error: redefinition of 'arch_kernel_shstk_enabled' kernel test robot
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2026-10-20 16:52 kernel test robot
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