Re: [PATCH v8 2/7] kexec: define functions to map and unmap segments

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

Hi steven,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.14-rc3 next-20250219]
[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/steven-chen/ima-define-and-call-ima_alloc_kexec_file_buf/20250219-065931
base:   linus/master
patch link:    https://lore.kernel.org/r/20250218225502.747963-3-chenste%40linux.microsoft.com
patch subject: [PATCH v8 2/7] kexec: define functions to map and unmap segments
config: x86_64-buildonly-randconfig-004-20250220 (https://download.01.org/0day-ci/archive/20250220/202502200848.MJEuphR1-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250220/202502200848.MJEuphR1-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/202502200848.MJEuphR1-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/crash_dump.h:5,
                    from mm/mm_init.c:30:
>> include/linux/kexec.h:479:47: warning: 'struct kimage' declared inside parameter list will not be visible outside of this definition or declaration
     479 | static inline void *kimage_map_segment(struct kimage *image, unsigned long addr, unsigned long size)
         |                                               ^~~~~~


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	extern void *kimage_map_segment(struct kimage *image, unsigned long addr, unsigned long size);
   471	extern 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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