arch/arm/kernel/return_address.c:44:1: warning: Label 'here' is not used. There is #if in function body so the label might be used in code that is removed by the preprocessor. [unusedLabelConfiguration]

[kernel test robot <lkp@intel.com>]

:::::: 
:::::: Manual check reason: "low confidence static check warning: arch/arm/kernel/return_address.c:44:1: warning: Label 'here' is not used. There is #if in function body so the label might be used in code that is removed by the preprocessor. [unusedLabelConfiguration]"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
CC: Ard Biesheuvel <ardb@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c3eb11fbb826879be773c137f281569efce67aa8
commit: c46c2c9b43f4f08f20dc06417fbf7091e4ca6d34 ARM: unwind: set frame.pc correctly for current-thread unwinding
date:   9 months ago
:::::: branch date: 15 hours ago
:::::: commit date: 9 months ago
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (cppcheck warning):
        # apt-get install cppcheck
        git checkout c46c2c9b43f4f08f20dc06417fbf7091e4ca6d34
        cppcheck --quiet --enable=style,performance,portability --template=gcc FILE

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/arm/kernel/return_address.c:44:1: warning: Label 'here' is not used. There is #if in function body so the label might be used in code that is removed by the preprocessor. [unusedLabelConfiguration]
   here:
   ^

vim +/here +44 arch/arm/kernel/return_address.c

4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  32  
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  33  void *return_address(unsigned int level)
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  34  {
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  35  	struct return_address_data data;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  36  	struct stackframe frame;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  37  
01223f365074d6 Keun-O Park           2013-03-18  38  	data.level = level + 2;
01223f365074d6 Keun-O Park           2013-03-18  39  	data.addr = NULL;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  40  
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  41  	frame.fp = (unsigned long)__builtin_frame_address(0);
a556ee1247b997 Behan Webster         2014-09-27  42  	frame.sp = current_stack_pointer;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  43  	frame.lr = (unsigned long)__builtin_return_address(0);
c46c2c9b43f4f0 Russell King (Oracle  2022-03-09 @44) here:
c46c2c9b43f4f0 Russell King (Oracle  2022-03-09  45) 	frame.pc = (unsigned long)&&here;
fed240d9c97438 Masami Hiramatsu      2021-10-21  46  #ifdef CONFIG_KRETPROBES
fed240d9c97438 Masami Hiramatsu      2021-10-21  47  	frame.kr_cur = NULL;
fed240d9c97438 Masami Hiramatsu      2021-10-21  48  	frame.tsk = current;
fed240d9c97438 Masami Hiramatsu      2021-10-21  49  #endif
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  50  
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  51  	walk_stackframe(&frame, save_return_addr, &data);
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  52  
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  53  	if (!data.level)
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  54  		return data.addr;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  55  	else
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  56  		return NULL;
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  57  }
4bf1fa5a34aa2d Uwe Kleine-König      2009-07-21  58  

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