[openeuler:openEuler-1.0-LTS 1743/1743] fs/proc/vmcore.c:183:1: warning: no previous prototype for 'copy_oldmem_page_encrypted'

[openeuler:openEuler-1.0-LTS 1743/1743] fs/proc/vmcore.c:183:1: warning: no previous prototype for 'copy_oldmem_page_encrypted'

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   ba07135cf74b1424e2f7f0c60e59c5b206ab320c
commit: e4590de4701ee3ee748058abf7b4e9492fa2b4a9 [1743/1743] proc/vmcore: Fix i386 build error of missing copy_oldmem_page_encrypted()
config: x86_64-buildonly-randconfig-2004-20250802 (https://download.01.org/0day-ci/archive/20250805/202508050002.tGJgi27V-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250805/202508050002.tGJgi27V-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/202508050002.tGJgi27V-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/proc/vmcore.c:183:1: warning: no previous prototype for 'copy_oldmem_page_encrypted' [-Wmissing-prototypes]
     183 | copy_oldmem_page_encrypted(unsigned long pfn, char *buf, size_t csize,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~
   fs/proc/vmcore.c:441: warning: Function parameter or member 'size' not described in 'vmcore_alloc_buf'
   fs/proc/vmcore.c:441: warning: Excess function parameter 'sizez' description in 'vmcore_alloc_buf'


vim +/copy_oldmem_page_encrypted +183 fs/proc/vmcore.c

   178	
   179	/*
   180	 * Architectures which support memory encryption override this.
   181	 */
   182	ssize_t __weak
 > 183	copy_oldmem_page_encrypted(unsigned long pfn, char *buf, size_t csize,
   184				   unsigned long offset, int userbuf)
   185	{
   186		return copy_oldmem_page(pfn, buf, csize, offset, userbuf);
   187	}
   188	

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