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Message-ID: <202508140127.RW2381Lq-lkp@intel.com>
Date: Thu, 14 Aug 2025 01:57:39 +0800
From: kernel test robot <lkp@...el.com>
To: Kees Cook <kees@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: arch/arm/include/asm/stacktrace.h:48:21: error: call to undeclared
function 'in_entry_text'; ISO C99 and later do not support implicit function
declarations
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 91325f31afc1026de28665cf1a7b6e157fa4d39d
commit: a8f0b1f8ef628bd1003eed650862836e97b89fdd kstack_erase: Support Clang stack depth tracking
date: 3 weeks ago
config: arm-randconfig-002-20250814 (https://download.01.org/0day-ci/archive/20250814/202508140127.RW2381Lq-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 3769ce013be2879bf0b329c14a16f5cb766f26ce)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250814/202508140127.RW2381Lq-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508140127.RW2381Lq-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/kstack_erase.c:13:
In file included from include/linux/kstack_erase.h:16:
>> arch/arm/include/asm/stacktrace.h:48:21: error: call to undeclared function 'in_entry_text'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
48 | frame->ex_frame = in_entry_text(frame->pc);
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:10:
In file included from include/linux/trace_recursion.h:5:
In file included from include/linux/interrupt.h:22:
>> arch/arm/include/asm/sections.h:14:20: error: static declaration of 'in_entry_text' follows non-static declaration
14 | static inline bool in_entry_text(unsigned long addr)
| ^
arch/arm/include/asm/stacktrace.h:48:21: note: previous implicit declaration is here
48 | frame->ex_frame = in_entry_text(frame->pc);
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
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/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
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/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
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/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
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/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:138:8: note: expanded from macro '_SIG_SET_BINOP'
138 | a3 = a->sig[3]; a2 = a->sig[2]; \
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from kernel/kstack_erase.c:14:
vim +/in_entry_text +48 arch/arm/include/asm/stacktrace.h
2335c9cb831faba Jinjie Ruan 2024-06-27 35
9865f1d46a68a5f Nikolay Borisov 2014-06-03 36 static __always_inline
9865f1d46a68a5f Nikolay Borisov 2014-06-03 37 void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
9865f1d46a68a5f Nikolay Borisov 2014-06-03 38 {
9865f1d46a68a5f Nikolay Borisov 2014-06-03 39 frame->fp = frame_pointer(regs);
9865f1d46a68a5f Nikolay Borisov 2014-06-03 40 frame->sp = regs->ARM_sp;
9865f1d46a68a5f Nikolay Borisov 2014-06-03 41 frame->lr = regs->ARM_lr;
9865f1d46a68a5f Nikolay Borisov 2014-06-03 42 frame->pc = regs->ARM_pc;
fed240d9c974381 Masami Hiramatsu 2021-10-21 43 #ifdef CONFIG_KRETPROBES
fed240d9c974381 Masami Hiramatsu 2021-10-21 44 frame->kr_cur = NULL;
fed240d9c974381 Masami Hiramatsu 2021-10-21 45 frame->tsk = current;
fed240d9c974381 Masami Hiramatsu 2021-10-21 46 #endif
752ec621ef5c307 Li Huafei 2022-08-26 47 #ifdef CONFIG_UNWINDER_FRAME_POINTER
752ec621ef5c307 Li Huafei 2022-08-26 @48 frame->ex_frame = in_entry_text(frame->pc);
752ec621ef5c307 Li Huafei 2022-08-26 49 #endif
9865f1d46a68a5f Nikolay Borisov 2014-06-03 50 }
9865f1d46a68a5f Nikolay Borisov 2014-06-03 51
:::::: The code at line 48 was first introduced by commit
:::::: 752ec621ef5c30777958cc5eb5f1cf394f7733f4 ARM: 9234/1: stacktrace: Avoid duplicate saving of exception PC value
:::::: TO: Li Huafei <lihuafei1@...wei.com>
:::::: CC: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
--
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https://github.com/intel/lkp-tests/wiki
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