[clangbuiltlinux:question_mark_operator 4/5] mm/sparse-vmemmap.c:230:9: warning: unused variable 'p'

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

tree:   https://github.com/ClangBuiltLinux/linux question_mark_operator
head:   532a7ac2d57bb5674f5feffb4ba378f8a32f3bcf
commit: 21ffcd408eaea91fb594ec0a27f9108349c2d31b [4/5] mm: sparse-vmemmap: use try operator ('?') for chained pointer returns
config: powerpc64-randconfig-002-20260912 (https://download.01.org/0day-ci/archive/20260912/202609121439.SevojbMn-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260912/202609121439.SevojbMn-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/202609121439.SevojbMn-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/sparse-vmemmap.c: In function 'vmemmap_alloc_block_zero':
   mm/sparse-vmemmap.c:186:44: error: expected expression before ';' token
     void *p = vmemmap_alloc_block(size, node)?;
                                               ^
   mm/sparse-vmemmap.c: In function 'vmemmap_pmd_populate':
   mm/sparse-vmemmap.c:197:55: error: expected expression before ';' token
      void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
                                                          ^
   mm/sparse-vmemmap.c: In function 'vmemmap_pud_populate':
   mm/sparse-vmemmap.c:208:55: error: expected expression before ';' token
      void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
                                                          ^
   mm/sparse-vmemmap.c: In function 'vmemmap_p4d_populate':
   mm/sparse-vmemmap.c:219:55: error: expected expression before ';' token
      void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
                                                          ^
   mm/sparse-vmemmap.c: In function 'vmemmap_pgd_populate':
   mm/sparse-vmemmap.c:230:55: error: expected expression before ';' token
      void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
                                                          ^
>> mm/sparse-vmemmap.c:230:9: warning: unused variable 'p' [-Wunused-variable]
      void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
            ^
   mm/sparse-vmemmap.c: In function 'vmemmap_populate_address':
   mm/sparse-vmemmap.c:241:48: error: expected expression before ';' token
     pgd_t *pgd = vmemmap_pgd_populate(addr, node)?;
                                                   ^
   mm/sparse-vmemmap.c:242:53: error: expected expression before ';' token
     p4d_t *p4d = vmemmap_p4d_populate(pgd, addr, node)?;
                                                        ^
   mm/sparse-vmemmap.c:243:53: error: expected expression before ';' token
     pud_t *pud = vmemmap_pud_populate(p4d, addr, node)?;
                                                        ^
   mm/sparse-vmemmap.c:244:53: error: expected expression before ';' token
     pmd_t *pmd = vmemmap_pmd_populate(pud, addr, node)?;
                                                        ^
   mm/sparse-vmemmap.c:245:75: error: expected expression before ';' token
     pte_t *pte = vmemmap_pte_populate(pmd, addr, node, altmap, ptpfn, flags)?;
                                                                              ^


vim +/p +230 mm/sparse-vmemmap.c

   214	
   215	static p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node)
   216	{
   217		p4d_t *p4d = p4d_offset(pgd, addr);
   218		if (p4d_none(*p4d)) {
 > 219			void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
   220			pud_init(p);
   221			p4d_populate_kernel(addr, p4d, p);
   222		}
   223		return p4d;
   224	}
   225	
   226	static pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node)
   227	{
   228		pgd_t *pgd = pgd_offset_k(addr);
   229		if (pgd_none(*pgd)) {
 > 230			void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node)?;
   231			pgd_populate_kernel(addr, pgd, p);
   232		}
   233		return pgd;
   234	}
   235	

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki