Re: [PATCH] x86/boot/compressed: make error() take const char *

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

Hi Reda,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/x86/core]
[also build test WARNING on tip/master linus/master v6.19 next-20260218]
[cannot apply to tip/auto-latest]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Reda-CHERKAOUI/x86-boot-compressed-make-error-take-const-char/20260219-000605
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/20260218160319.31884-1-redacherkaoui67%40gmail.com
patch subject: [PATCH] x86/boot/compressed: make error() take const char *
config: x86_64-buildonly-randconfig-002-20260219 (https://download.01.org/0day-ci/archive/20260219/202602190801.5xGbl6Eh-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260219/202602190801.5xGbl6Eh-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/202602190801.5xGbl6Eh-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/boot/compressed/misc.c: In function 'extract_kernel':
>> arch/x86/boot/compressed/misc.c:521:61: warning: passing argument 3 of 'decompress_kernel' from incompatible pointer type [-Wincompatible-pointer-types]
     521 |         entry_offset = decompress_kernel(output, virt_addr, error);
         |                                                             ^~~~~
         |                                                             |
         |                                                             __attribute__((noreturn)) void (*)(const char *)
   arch/x86/boot/compressed/misc.c:345:40: note: expected 'void (*)(char *)' but argument is of type '__attribute__((noreturn)) void (*)(const char *)'
     345 |                                 void (*error)(char *x))
         |                                 ~~~~~~~^~~~~~~~~~~~~~~


vim +/decompress_kernel +521 arch/x86/boot/compressed/misc.c

^1da177e4c3f41 arch/i386/boot/compressed/misc.c Linus Torvalds  2005-04-16  513  
e605a425975b07 arch/x86/boot/compressed/misc.c  Joe Millenbach  2012-07-19  514  	debug_putstr("\nDecompressing Linux... ");
3fd1239a783522 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2023-06-06  515  
3fd1239a783522 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2023-06-06  516  	if (init_unaccepted_memory()) {
3fd1239a783522 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2023-06-06  517  		debug_putstr("Accepting memory... ");
5adfeaecc487e7 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2024-08-09  518  		accept_memory(__pa(output), needed_size);
3fd1239a783522 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2023-06-06  519  	}
3fd1239a783522 arch/x86/boot/compressed/misc.c  Kiryl Shutsemau 2023-06-06  520  
83381519352d6b arch/x86/boot/compressed/misc.c  Ard Biesheuvel  2023-08-07 @521  	entry_offset = decompress_kernel(output, virt_addr, error);

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