Re: [PATCH v5 01/16] kexec: define functions to map and unmap segments

Re: [PATCH v5 01/16] kexec: define functions to map and unmap segments

[kernel test robot]

Hi Changyuan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on a7f2e10ecd8f18b83951b0bab47ddaf48f93bf47]

url:    https://github.com/intel-lab-lkp/linux/commits/Changyuan-Lyu/kexec-define-functions-to-map-and-unmap-segments/20250320-095900
base:   a7f2e10ecd8f18b83951b0bab47ddaf48f93bf47
patch link:    https://lore.kernel.org/r/20250320015551.2157511-2-changyuanl%40google.com
patch subject: [PATCH v5 01/16] kexec: define functions to map and unmap segments
config: i386-buildonly-randconfig-002-20250320 (https://download.01.org/0day-ci/archive/20250320/202503202151.vHOV0UKU-lkp@intel.com/config)
compiler: clang version 20.1.1 (https://github.com/llvm/llvm-project 424c2d9b7e4de40d0804dd374721e6411c27d1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250320/202503202151.vHOV0UKU-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/202503202151.vHOV0UKU-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/reboot.c:13:
>> include/linux/kexec.h:479:47: warning: declaration of 'struct kimage' will not be visible outside of this function [-Wvisibility]
     479 | static inline void *kimage_map_segment(struct kimage *image, unsigned long addr, unsigned long size)
         |                                               ^
   1 warning generated.


vim +479 include/linux/kexec.h

   466	
   467	#define kexec_dprintk(fmt, arg...) \
   468	        do { if (kexec_file_dbg_print) pr_info(fmt, ##arg); } while (0)
   469	
   470	void *kimage_map_segment(struct kimage *image, unsigned long addr, unsigned long size);
   471	void kimage_unmap_segment(void *buffer);
   472	#else /* !CONFIG_KEXEC_CORE */
   473	struct pt_regs;
   474	struct task_struct;
   475	static inline void __crash_kexec(struct pt_regs *regs) { }
   476	static inline void crash_kexec(struct pt_regs *regs) { }
   477	static inline int kexec_should_crash(struct task_struct *p) { return 0; }
   478	static inline int kexec_crash_loaded(void) { return 0; }
 > 479	static inline void *kimage_map_segment(struct kimage *image, unsigned long addr, unsigned long size)
   480	{ return NULL; }
   481	static inline void kimage_unmap_segment(void *buffer) { }
   482	#define kexec_in_progress false
   483	#endif /* CONFIG_KEXEC_CORE */
   484	

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