linux-kernel - arch/arm/include/asm/stacktrace.h:48:21: error: implicit declaration of function 'in_entry

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Message-ID: <202505061113.kBQwKkqd-lkp@intel.com>
Date: Tue, 6 May 2025 12:06:26 +0800
From: kernel test robot <lkp@...el.com>
To: Jinjie Ruan <ruanjinjie@...wei.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: arch/arm/include/asm/stacktrace.h:48:21: error: implicit declaration
 of function 'in_entry_text'

Hi Jinjie,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   95d3481af6dc90fd7175a7643fd108cdcb808ce5
commit: 2335c9cb831faba1a4efcc612886073b6f175fe4 ARM: 9407/1: Add support for STACKLEAK gcc plugin
date:   10 months ago
config: arm-randconfig-r071-20250506 (https://download.01.org/0day-ci/archive/20250506/202505061113.kBQwKkqd-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250506/202505061113.kBQwKkqd-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/202505061113.kBQwKkqd-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/stackleak.h:16,
                    from kernel/stackleak.c:13:
   arch/arm/include/asm/stacktrace.h: In function 'arm_get_current_stackframe':
>> arch/arm/include/asm/stacktrace.h:48:21: error: implicit declaration of function 'in_entry_text' [-Werror=implicit-function-declaration]
      frame->ex_frame = in_entry_text(frame->pc);
                        ^~~~~~~~~~~~~
   In file included from include/linux/interrupt.h:21,
                    from include/linux/trace_recursion.h:5,
                    from include/linux/ftrace.h:10,
                    from include/linux/kprobes.h:28,
                    from kernel/stackleak.c:14:
   arch/arm/include/asm/sections.h: At top level:
>> arch/arm/include/asm/sections.h:14:20: error: conflicting types for 'in_entry_text'
    static inline bool in_entry_text(unsigned long addr)
                       ^~~~~~~~~~~~~
   In file included from include/linux/stackleak.h:16,
                    from kernel/stackleak.c:13:
   arch/arm/include/asm/stacktrace.h:48:21: note: previous implicit declaration of 'in_entry_text' was here
      frame->ex_frame = in_entry_text(frame->pc);
                        ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/in_entry_text +48 arch/arm/include/asm/stacktrace.h

2335c9cb831fab Jinjie Ruan      2024-06-27  35  
9865f1d46a68a5 Nikolay Borisov  2014-06-03  36  static __always_inline
9865f1d46a68a5 Nikolay Borisov  2014-06-03  37  void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
9865f1d46a68a5 Nikolay Borisov  2014-06-03  38  {
9865f1d46a68a5 Nikolay Borisov  2014-06-03  39  		frame->fp = frame_pointer(regs);
9865f1d46a68a5 Nikolay Borisov  2014-06-03  40  		frame->sp = regs->ARM_sp;
9865f1d46a68a5 Nikolay Borisov  2014-06-03  41  		frame->lr = regs->ARM_lr;
9865f1d46a68a5 Nikolay Borisov  2014-06-03  42  		frame->pc = regs->ARM_pc;
fed240d9c97438 Masami Hiramatsu 2021-10-21  43  #ifdef CONFIG_KRETPROBES
fed240d9c97438 Masami Hiramatsu 2021-10-21  44  		frame->kr_cur = NULL;
fed240d9c97438 Masami Hiramatsu 2021-10-21  45  		frame->tsk = current;
fed240d9c97438 Masami Hiramatsu 2021-10-21  46  #endif
752ec621ef5c30 Li Huafei        2022-08-26  47  #ifdef CONFIG_UNWINDER_FRAME_POINTER
752ec621ef5c30 Li Huafei        2022-08-26 @48  		frame->ex_frame = in_entry_text(frame->pc);
752ec621ef5c30 Li Huafei        2022-08-26  49  #endif
9865f1d46a68a5 Nikolay Borisov  2014-06-03  50  }
9865f1d46a68a5 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>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki