[avpatel:riscv_mpxy_imp_v1 2/5] include/asm-generic/memory_model.h:56:21: error: implicit declaration of function 'memdesc_section'

[avpatel:riscv_mpxy_imp_v1 2/5] include/asm-generic/memory_model.h:56:21: error: implicit declaration of function 'memdesc_section'

[kernel test robot]

tree:   https://github.com/avpatel/linux.git riscv_mpxy_imp_v1
head:   ca441e957bb4806b528959ae80efb7e7a9f5447a
commit: 36c74ca9f1dd2278453c544310c73d45beb9c993 [2/5] RISC-V: Move common MPXY helper routines to arch/riscv
config: riscv-randconfig-2000-20260930 (https://download.01.org/0day-ci/archive/20260930/202609300412.K0Nx5T4e-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260930/202609300412.K0Nx5T4e-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/202609300412.K0Nx5T4e-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/riscv/kernel/sbi_mpxy.c:16:
   arch/riscv/kernel/sbi_mpxy.c: In function 'mpxy_setup_shmem':
>> include/asm-generic/memory_model.h:56:21: error: implicit declaration of function 'memdesc_section' [-Wimplicit-function-declaration]
      56 |         int __sec = memdesc_section(&__pg->flags);              \
         |                     ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/sbi.h:573:29: note: in definition of macro 'sbi_ecall'
     573 |                 __sbi_ecall(a0, a1, a2, a3, a4, a5, f, e)
         |                             ^~
   include/asm-generic/memory_model.h:85:33: note: in expansion of macro 'PFN_PHYS'
      85 | #define page_to_phys(page)      PFN_PHYS(page_to_pfn(page))
         |                                 ^~~~~~~~
   include/asm-generic/memory_model.h:73:21: note: in expansion of macro '__page_to_pfn'
      73 | #define page_to_pfn __page_to_pfn
         |                     ^~~~~~~~~~~~~
   include/asm-generic/memory_model.h:85:42: note: in expansion of macro 'page_to_pfn'
      85 | #define page_to_phys(page)      PFN_PHYS(page_to_pfn(page))
         |                                          ^~~~~~~~~~~
   arch/riscv/kernel/sbi_mpxy.c:292:26: note: in expansion of macro 'page_to_phys'
     292 |                          page_to_phys(shmem_page), 0, 0, 0, 0, 0);
         |                          ^~~~~~~~~~~~


vim +/memdesc_section +56 include/asm-generic/memory_model.h

8f6aac419bd590 Christoph Lameter 2007-10-16  48  
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  49  #elif defined(CONFIG_SPARSEMEM)
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  50  /*
1a49123b343461 Zhang Yanfei      2013-10-03  51   * Note: section's mem_map is encoded to reflect its start_pfn.
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  52   * section[i].section_mem_map == mem_map's address - start_pfn;
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  53   */
67de648211fa04 Andy Whitcroft    2006-06-23  54  #define __page_to_pfn(pg)					\
aa462abe8aaf21 Ian Campbell      2011-08-17  55  ({	const struct page *__pg = (pg);				\
67a06fdfbf6f59 Hui Zhu           2026-06-30 @56  	int __sec = memdesc_section(&__pg->flags);		\
f05b6284ee5d3b Randy Dunlap      2007-02-10  57  	(unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec)));	\
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  58  })
a117e66ed45ac0 KAMEZAWA Hiroyuki 2006-03-27  59  

:::::: The code at line 56 was first introduced by commit
:::::: 67a06fdfbf6f590d3e47b0592559e8fdc2a6998a mm: fix ASSERT_EXCLUSIVE_BITS by passing memdesc_flags_t by pointer

:::::: TO: Hui Zhu <zhuhui@kylinos.cn>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>

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