[bcain:bcain/qemu_boot 47/70] mm/mm_init.c:936:37: error: 'struct zone' has no member named 'pageblock_flags'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bcain/linux.git bcain/qemu_boot
head:   a8a4b998ba937d19200cfad69da3029fd54a8f5a
commit: 8d43a66fdb5007eb7f368b20a2ca44395e8e47d9 [47/70] mm: guard pageblock init against missing pageblock_flags
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20260717/[email protected]/config)
compiler: alpha-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260717/[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 include/linux/array_size.h:5,
                    from include/linux/kernel.h:16,
                    from mm/mm_init.c:9:
   mm/mm_init.c: In function 'memmap_init_range':
>> mm/mm_init.c:936:37: error: 'struct zone' has no member named 'pageblock_flags'
     936 |                         if (likely(z->pageblock_flags)) {
         |                                     ^~
   include/linux/compiler.h:76:45: note: in definition of macro 'likely'
      76 | # define likely(x)      __builtin_expect(!!(x), 1)
         |                                             ^


vim +936 mm/mm_init.c

   903	
   904		for (pfn = start_pfn; pfn < end_pfn; ) {
   905			/*
   906			 * There can be holes in boot-time mem_map[]s handed to this
   907			 * function.  They do not exist on hotplugged memory.
   908			 */
   909			if (context == MEMINIT_EARLY) {
   910				if (overlap_memmap_init(zone, &pfn))
   911					continue;
   912				if (defer_init(nid, pfn, zone_end_pfn)) {
   913					deferred_struct_pages = true;
   914					break;
   915				}
   916			}
   917	
   918			page = pfn_to_page(pfn);
   919			__init_single_page(page, pfn, zone, nid);
   920			if (context == MEMINIT_HOTPLUG) {
   921	#ifdef CONFIG_ZONE_DEVICE
   922				if (zone == ZONE_DEVICE)
   923					__SetPageReserved(page);
   924				else
   925	#endif
   926					__SetPageOffline(page);
   927			}
   928	
   929			/*
   930			 * Usually, we want to mark the pageblock MIGRATE_MOVABLE,
   931			 * such that unmovable allocations won't be scattered all
   932			 * over the place during system boot.
   933			 */
   934			if (pageblock_aligned(pfn)) {
   935				struct zone *z = page_zone(page);
 > 936				if (likely(z->pageblock_flags)) {
   937					init_pageblock_migratetype(page, migratetype,
   938							isolate_pageblock);
   939				} else {
   940					pr_warn_once("memmap_init_range: skipping pageblock init for pfn 0x%lx (zone %s has no pageblock_flags)\n",
   941						     pfn, z->name);
   942				}
   943				cond_resched();
   944			}
   945			pfn++;
   946		}
   947	}
   948	

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