linux-kernel - Re: [PATCH 1/2] mm, thp: introduce dedicated transparent huge page allocation interfaces

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Date:   Wed, 18 Oct 2017 23:54:55 +0800
From:   kbuild test robot <lkp@...el.com>
To:     changbin.du@...el.com
Cc:     kbuild-all@...org, akpm@...ux-foundation.org, corbet@....net,
        hughd@...gle.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Changbin Du <changbin.du@...el.com>
Subject: Re: [PATCH 1/2] mm, thp: introduce dedicated transparent huge page
 allocation interfaces

Hi Changbin,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.14-rc5 next-20171017]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/changbin-du-intel-com/mm-thp-introduce-dedicated-transparent-huge-page-allocation-interfaces/20171018-230128
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x003-201742 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All error/warnings (new ones prefixed by >>):

   In file included from mm/shmem.c:70:0:
   include/linux/migrate.h: In function 'new_page_nodemask':
   include/linux/migrate.h:49:10: error: implicit declaration of function 'alloc_transhuge_page_nodemask' [-Werror=implicit-function-declaration]
      return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/migrate.h:49:10: warning: return makes pointer from integer without a cast [-Wint-conversion]
      return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        preferred_nid, nodemask);
        ~~~~~~~~~~~~~~~~~~~~~~~~
   mm/shmem.c: In function 'shmem_alloc_hugepage':
>> mm/shmem.c:1448:9: error: implicit declaration of function 'alloc_transhuge_page_vma' [-Werror=implicit-function-declaration]
     page = alloc_transhuge_page_vma(gfp, &pvma, 0);
            ^~~~~~~~~~~~~~~~~~~~~~~~
>> mm/shmem.c:1448:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     page = alloc_transhuge_page_vma(gfp, &pvma, 0);
          ^
   cc1: some warnings being treated as errors

vim +/alloc_transhuge_page_vma +1448 mm/shmem.c

  1423	
  1424	static struct page *shmem_alloc_hugepage(gfp_t gfp,
  1425			struct shmem_inode_info *info, pgoff_t index)
  1426	{
  1427		struct vm_area_struct pvma;
  1428		struct inode *inode = &info->vfs_inode;
  1429		struct address_space *mapping = inode->i_mapping;
  1430		pgoff_t idx, hindex;
  1431		void __rcu **results;
  1432		struct page *page;
  1433	
  1434		if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGE_PAGECACHE))
  1435			return NULL;
  1436	
  1437		hindex = round_down(index, HPAGE_PMD_NR);
  1438		rcu_read_lock();
  1439		if (radix_tree_gang_lookup_slot(&mapping->page_tree, &results, &idx,
  1440					hindex, 1) && idx < hindex + HPAGE_PMD_NR) {
  1441			rcu_read_unlock();
  1442			return NULL;
  1443		}
  1444		rcu_read_unlock();
  1445	
  1446		shmem_pseudo_vma_init(&pvma, info, hindex);
  1447		gfp |= __GFP_COMP | __GFP_NORETRY | __GFP_NOWARN;
> 1448		page = alloc_transhuge_page_vma(gfp, &pvma, 0);
  1449		shmem_pseudo_vma_destroy(&pvma);
  1450		return page;
  1451	}
  1452	

---
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