[linux-stable-rc:linux-4.14.y 9243/9999] fs/proc/vmcore.c:171:1: warning: no previous prototype for 'copy_oldmem_page_encrypted'

[linux-stable-rc:linux-4.14.y 9243/9999] fs/proc/vmcore.c:171:1: warning: no previous prototype for 'copy_oldmem_page_encrypted'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y
head:   e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b
commit: 27647dde3018985379d58feacf2fc3f11e91b478 [9243/9999] proc/vmcore: Fix i386 build error of missing copy_oldmem_page_encrypted()
config: mips-randconfig-r005-20200809 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 27647dde3018985379d58feacf2fc3f11e91b478
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/workqueue.h:9,
                    from include/linux/srcu.h:34,
                    from include/linux/notifier.h:16,
                    from include/linux/memory_hotplug.h:7,
                    from include/linux/mmzone.h:782,
                    from include/linux/gfp.h:6,
                    from include/linux/mm.h:10,
                    from fs/proc/vmcore.c:10:
   include/linux/timer.h: In function 'timer_setup':
   include/linux/timer.h:179:23: warning: cast between incompatible function types from 'void (*)(struct timer_list *)' to 'void (*)(long unsigned int)' [-Wcast-function-type]
     179 |  __setup_timer(timer, (TIMER_FUNC_TYPE)callback,
         |                       ^
   include/linux/timer.h:144:25: note: in definition of macro '__setup_timer'
     144 |   (_timer)->function = (_fn);    \
         |                         ^~~
   fs/proc/vmcore.c: At top level:
>> fs/proc/vmcore.c:171:1: warning: no previous prototype for 'copy_oldmem_page_encrypted' [-Wmissing-prototypes]
     171 | copy_oldmem_page_encrypted(unsigned long pfn, char *buf, size_t csize,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/copy_oldmem_page_encrypted +171 fs/proc/vmcore.c

   166	
   167	/*
   168	 * Architectures which support memory encryption override this.
   169	 */
   170	ssize_t __weak
 > 171	copy_oldmem_page_encrypted(unsigned long pfn, char *buf, size_t csize,
   172				   unsigned long offset, int userbuf)
   173	{
   174		return copy_oldmem_page(pfn, buf, csize, offset, userbuf);
   175	}
   176	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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