* [davidhildenbrand:folded_pgtable 13/13] include/asm-generic/pgtable-nop4d.h:46:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations
@ 2026-07-04 2:39 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-07-04 2:39 UTC (permalink / raw)
To: David Hildenbrand (Arm); +Cc: llvm, oe-kbuild-all
tree: https://github.com/davidhildenbrand/linux folded_pgtable
head: 898b37f4865d94ff198bb62dfe2517a6d1b7d44e
commit: 898b37f4865d94ff198bb62dfe2517a6d1b7d44e [13/13] mm/pgtable: catch abuse of folded dummy pgd_t/p4d_t/pud_t
config: i386-defconfig (https://download.01.org/0day-ci/archive/20260704/202607041001.lwd0KBN0-lkp@intel.com/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260704/202607041001.lwd0KBN0-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/202607041001.lwd0KBN0-lkp@intel.com/
All errors (new ones prefixed by >>):
WARN /zdci/src/lkp/lib/log.sh:131:in `log_warn': /opt/cross/rustc-1.96.0-bindgen-0.72.1 doesn't exist
from /zdci/src/kernel-tests/lib/debug.sh:164: kbuild_log_warn
from /zdci/src/kernel-tests/lib/kbuild.sh:3371: export_rust_path
from /zdci/src/kernel-tests/lib/kbuild.sh:3361: export_compiler_path
from /zdci/src/kernel-tests/lib/kbuild.sh:3840: invoke_make
from /zdci/src/kernel-tests/lib/kbuild.sh:4022: make
from /zdci/src/kernel-tests/common.sh:202: redirect_error_to_screen
from /zdci/src/kernel-tests/common.sh:210: redirect_command_errors
from /zdci/src/kernel-tests/lib/kbuild.sh:5680: make_prepare
from /zdci/src/kernel-tests/lib/kbuild.sh:5909: test_kernel_build
from /zdci/src/kernel-tests/lib/builder/base.sh:442: builder_execute_build
from /zdci/src/kernel-tests/lib/kbuild.sh:6419: compile_one_config
from /zdci/src/kernel-tests/lib/builder/base.sh:88: builder_compile
from /zdci/src/kernel-tests/bisect-test-build-error.sh:101: main
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:59:
In file included from include/linux/irqflags.h:18:
In file included from arch/x86/include/asm/irqflags.h:100:
In file included from arch/x86/include/asm/paravirt.h:10:
In file included from arch/x86/include/asm/paravirt_types.h:12:
In file included from arch/x86/include/asm/pgtable_types.h:354:
>> include/asm-generic/pgtable-nop4d.h:46:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
46 | BUILD_BUG_ON(__builtin_constant_p(pgd_val(*pgd)));
| ^
include/asm-generic/pgtable-nop4d.h:46:36: note: did you mean 'pgd_bad'?
include/asm-generic/pgtable-nop4d.h:22:19: note: 'pgd_bad' declared here
22 | static inline int pgd_bad(pgd_t pgd) { return 0; }
| ^
include/asm-generic/pgtable-nop4d.h:53:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
53 | BUILD_BUG_ON(__builtin_constant_p(pgd_val(*pgdp)));
| ^
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:59:
In file included from include/linux/irqflags.h:18:
In file included from arch/x86/include/asm/irqflags.h:100:
In file included from arch/x86/include/asm/paravirt.h:10:
In file included from arch/x86/include/asm/paravirt_types.h:12:
In file included from arch/x86/include/asm/pgtable_types.h:380:
>> include/asm-generic/pgtable-nopud.h:53:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
53 | BUILD_BUG_ON(__builtin_constant_p(p4d_val(*p4d)));
| ^
include/asm-generic/pgtable-nop4d.h:58:24: note: expanded from macro 'p4d_val'
58 | #define p4d_val(x) (pgd_val((x).pgd))
| ^
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:59:
In file included from include/linux/irqflags.h:18:
In file included from arch/x86/include/asm/irqflags.h:100:
In file included from arch/x86/include/asm/paravirt.h:10:
In file included from arch/x86/include/asm/paravirt_types.h:12:
In file included from arch/x86/include/asm/pgtable_types.h:380:
include/asm-generic/pgtable-nopud.h:61:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
61 | BUILD_BUG_ON(__builtin_constant_p(p4d_val(*p4dp)));
| ^
include/asm-generic/pgtable-nop4d.h:58:24: note: expanded from macro 'p4d_val'
58 | #define p4d_val(x) (pgd_val((x).pgd))
| ^
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:59:
In file included from include/linux/irqflags.h:18:
In file included from arch/x86/include/asm/irqflags.h:100:
In file included from arch/x86/include/asm/paravirt.h:10:
In file included from arch/x86/include/asm/paravirt_types.h:12:
In file included from arch/x86/include/asm/pgtable_types.h:404:
>> include/asm-generic/pgtable-nopmd.h:55:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
55 | BUILD_BUG_ON(__builtin_constant_p(pud_val(*pud)));
| ^
include/asm-generic/pgtable-nopud.h:66:24: note: expanded from macro 'pud_val'
66 | #define pud_val(x) (p4d_val((x).p4d))
| ^
include/asm-generic/pgtable-nop4d.h:58:24: note: expanded from macro 'p4d_val'
58 | #define p4d_val(x) (pgd_val((x).pgd))
| ^
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:59:
In file included from include/linux/irqflags.h:18:
In file included from arch/x86/include/asm/irqflags.h:100:
In file included from arch/x86/include/asm/paravirt.h:10:
In file included from arch/x86/include/asm/paravirt_types.h:12:
In file included from arch/x86/include/asm/pgtable_types.h:404:
include/asm-generic/pgtable-nopmd.h:63:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
63 | BUILD_BUG_ON(__builtin_constant_p(pud_val(*pudp)));
| ^
include/asm-generic/pgtable-nopud.h:66:24: note: expanded from macro 'pud_val'
66 | #define pud_val(x) (p4d_val((x).p4d))
| ^
include/asm-generic/pgtable-nop4d.h:58:24: note: expanded from macro 'p4d_val'
58 | #define p4d_val(x) (pgd_val((x).pgd))
| ^
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[2]') [-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[2]') [-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:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-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:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-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:
vim +/pgd_val +46 include/asm-generic/pgtable-nop4d.h
43
44 static __always_inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
45 {
> 46 BUILD_BUG_ON(__builtin_constant_p(pgd_val(*pgd)));
47 return (p4d_t *)pgd;
48 }
49
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2026-07-04 2:40 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-04 2:39 [davidhildenbrand:folded_pgtable 13/13] include/asm-generic/pgtable-nop4d.h:46:36: error: call to undeclared function 'pgd_val'; ISO C99 and later do not support implicit function declarations kernel test robot
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.