tree:   git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup-writeback-20150106
head:   393b71c00e25227a020f9dbf8ffdddebac4fdf1e
commit: c2b42c0f94035f23cd0524c2cece2f3e05d28255 [63/265] CMA: fix CMA's page number is substructed twice in __zone_watermark_ok
config: parisc-c3000_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout c2b42c0f94035f23cd0524c2cece2f3e05d28255
  # save the attached .config to linux build tree
  make.cross ARCH=parisc 

All error/warnings:

   mm/page_alloc.c: In function '__free_one_page':
>> mm/page_alloc.c:654:27: error: 'struct free_area' has no member named 'cma_nr_free'
        zone->free_area[order].cma_nr_free--;
                              ^
>> mm/page_alloc.c:689:25: error: 'struct free_area' has no member named 'cma_nr_free'
      zone->free_area[order].cma_nr_free++;
                            ^
   mm/page_alloc.c: In function 'expand':
>> mm/page_alloc.c:945:8: error: 'struct free_area' has no member named 'cma_nr_free'
       area->cma_nr_free++;
           ^
   mm/page_alloc.c: In function '__rmqueue_smallest':
>> mm/page_alloc.c:1030:8: error: 'struct free_area' has no member named 'cma_nr_free'
       area->cma_nr_free--;
           ^
   mm/page_alloc.c: In function '__rmqueue_fallback':
>> mm/page_alloc.c:1220:9: error: 'struct free_area' has no member named 'cma_nr_free'
        area->cma_nr_free--;
            ^
   mm/page_alloc.c: In function '__isolate_free_page':
>> mm/page_alloc.c:1611:25: error: 'struct free_area' has no member named 'cma_nr_free'
      zone->free_area[order].cma_nr_free--;
                            ^
   mm/page_alloc.c: In function '__zone_watermark_ok':
>> mm/page_alloc.c:1847:33: error: 'struct free_area' has no member named 'cma_nr_free'
       free_pages += z->free_area[o].cma_nr_free << o;
                                    ^
   mm/page_alloc.c: In function 'zone_init_free_lists':
>> mm/page_alloc.c:4250:25: error: 'struct free_area' has no member named 'cma_nr_free'
      zone->free_area[order].cma_nr_free = 0;
                            ^

vim +654 mm/page_alloc.c

   648			if (page_is_guard(buddy)) {
   649				clear_page_guard(zone, buddy, order, migratetype);
   650			} else {
   651				list_del(&buddy->lru);
   652				zone->free_area[order].nr_free--;
   653				if (is_migrate_cma(migratetype))
 > 654					zone->free_area[order].cma_nr_free--;
   655				rmv_page_order(buddy);
   656			}
   657			combined_idx = buddy_idx & page_idx;
   658			page = page + (combined_idx - page_idx);
   659			page_idx = combined_idx;
   660			order++;
   661		}
   662		set_page_order(page, order);
   663	
   664		/*
   665		 * If this is not the largest possible page, check if the buddy
   666		 * of the next-highest order is free. If it is, it's possible
   667		 * that pages are being freed that will coalesce soon. In case,
   668		 * that is happening, add the free page to the tail of the list
   669		 * so it's less likely to be used soon and more likely to be merged
   670		 * as a higher order page
   671		 */
   672		if ((order < MAX_ORDER-2) && pfn_valid_within(page_to_pfn(buddy))) {
   673			struct page *higher_page, *higher_buddy;
   674			combined_idx = buddy_idx & page_idx;
   675			higher_page = page + (combined_idx - page_idx);
   676			buddy_idx = __find_buddy_index(combined_idx, order + 1);
   677			higher_buddy = higher_page + (buddy_idx - combined_idx);
   678			if (page_is_buddy(higher_page, higher_buddy, order + 1)) {
   679				list_add_tail(&page->lru,
   680					&zone->free_area[order].free_list[migratetype]);
   681				goto out;
   682			}
   683		}
   684	
   685		list_add(&page->lru, &zone->free_area[order].free_list[migratetype]);
   686	out:
   687		zone->free_area[order].nr_free++;
   688		if (is_migrate_cma(migratetype))
 > 689			zone->free_area[order].cma_nr_free++;
   690	}
   691	
   692	static inline int free_pages_check(struct page *page)

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0-DAY kernel test infrastructure                Open Source Technology Center
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