Re: [RFC PATCH 1/4 v1] crash/vmcore: VMCOREINFO creation from non-kdump kernel

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

Hi Lukas,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on tip/x86/core]
[also build test ERROR on tip/x86/mm linus/master v6.6 next-20231110]
[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/Lukas-Hruska/crash-vmcore-VMCOREINFO-creation-from-non-kdump-kernel/20231111-022332
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/20231110150057.15717-2-lhruska%40suse.cz
patch subject: [RFC PATCH 1/4 v1] crash/vmcore: VMCOREINFO creation from non-kdump kernel
config: loongarch-randconfig-002-20231111 (https://download.01.org/0day-ci/archive/20231111/202311110746.PACzMVRq-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231111/202311110746.PACzMVRq-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/202311110746.PACzMVRq-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/crash_dump.c: In function 'elfcorehdr_read_notes':
>> kernel/crash_dump.c:77:25: error: implicit declaration of function 'cc_platform_has' [-Werror=implicit-function-declaration]
      77 |                         cc_platform_has(CC_ATTR_MEM_ENCRYPT));
         |                         ^~~~~~~~~~~~~~~
>> kernel/crash_dump.c:77:41: error: 'CC_ATTR_MEM_ENCRYPT' undeclared (first use in this function)
      77 |                         cc_platform_has(CC_ATTR_MEM_ENCRYPT));
         |                                         ^~~~~~~~~~~~~~~~~~~
   kernel/crash_dump.c:77:41: note: each undeclared identifier is reported only once for each function it appears in
   kernel/crash_dump.c:78:1: warning: control reaches end of non-void function [-Wreturn-type]
      78 | }
         | ^
   cc1: some warnings being treated as errors


vim +/cc_platform_has +77 kernel/crash_dump.c

    60	
    61	/*
    62	 * Architectures may override this function to read from notes sections
    63	 */
    64	ssize_t __weak elfcorehdr_read_notes(char *buf, size_t count, u64 *ppos)
    65	{
    66		struct kvec kvec = { .iov_base = buf, .iov_len = count };
    67		struct iov_iter iter;
    68	
    69		if (!is_kdump_kernel()) {
    70			memcpy(buf, __va(*ppos), count);
    71			return count;
    72		}
    73	
    74		iov_iter_kvec(&iter, ITER_DEST, &kvec, 1, count);
    75	
    76		return read_from_oldmem(&iter, count, ppos,
  > 77				cc_platform_has(CC_ATTR_MEM_ENCRYPT));
    78	}
    79	

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