[avpatel:riscv_trace_support_v5 86/108] include/asm-generic/memory_model.h:56:14: error: implicit declaration of function 'memdesc_section'

tree:   https://github.com/avpatel/linux.git riscv_trace_support_v5
head:   e58ea3f194d326370813c549a76ecdfa211a4768
commit: a81b95aa56abb5c8e32d24bcdd6d51cc998f1fcf [86/108] RISC-V: Move common MPXY helper routines to arch/riscv
config: riscv-randconfig-001-20260821 (https://download.01.org/0day-ci/archive/20260821/[email protected]/config)
compiler: riscv32-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260821/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

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:56:14: error: implicit declaration of function 'memdesc_section' [-Werror=implicit-function-declaration]
      56 |  int __sec = memdesc_section(__pg->flags);  \
         |              ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/sbi.h:634:15: note: in definition of macro 'sbi_ecall'
     634 |   __sbi_ecall(a0, a1, a2, a3, a4, a5, f, e)
         |               ^~
   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:79:24: note: in expansion of macro 'page_to_pfn'
      79 |  unsigned long __pfn = page_to_pfn(page);   \
         |                        ^~~~~~~~~~~
   arch/riscv/kernel/sbi_mpxy.c:287:5: note: in expansion of macro 'page_to_phys'
     287 |     page_to_phys(shmem_page), 0, 0, 0, 0, 0);
         |     ^~~~~~~~~~~~
   cc1: some warnings being treated as errors


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);				\
56d578c1300f7e Matthew Wilcox (Oracle  2025-08-05 @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
:::::: 56d578c1300f7efe9605b75714173dd3fda16fe2 mm: convert page_to_section() to memdesc_section()

:::::: TO: Matthew Wilcox (Oracle) <[email protected]>
:::::: CC: Andrew Morton <[email protected]>

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