linux-kernel - Re: [patch -mm] mm, vmalloc: remove VM

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Message-ID: <201511190857.VC71JCzM%fengguang.wu@intel.com>
Date:	Thu, 19 Nov 2015 08:40:19 +0800
From:	kbuild test robot <lkp@...el.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [patch -mm] mm, vmalloc: remove VM_VPAGES

Hi David,

[auto build test WARNING on: next-20151118]
[also build test WARNING on: v4.4-rc1]

url:    https://github.com/0day-ci/linux/commits/David-Rientjes/mm-vmalloc-remove-VM_VPAGES/20151119-083326
config: x86_64-randconfig-x015-11181928 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/linkage.h:4:0,
                    from include/linux/preempt.h:9,
                    from include/linux/spinlock.h:50,
                    from include/linux/vmalloc.h:4,
                    from mm/vmalloc.c:11:
   mm/vmalloc.c: In function '__vunmap':
   mm/vmalloc.c:1484:21: error: 'VM_VPAGES' undeclared (first use in this function)
      if (area->flags & VM_VPAGES)
                        ^
   include/linux/compiler.h:147:28: note: in definition of macro '__trace_if'
     if (__builtin_constant_p((cond)) ? !!(cond) :   \
                               ^
>> mm/vmalloc.c:1484:3: note: in expansion of macro 'if'
      if (area->flags & VM_VPAGES)
      ^
   mm/vmalloc.c:1484:21: note: each undeclared identifier is reported only once for each function it appears in
      if (area->flags & VM_VPAGES)
                        ^
   include/linux/compiler.h:147:28: note: in definition of macro '__trace_if'
     if (__builtin_constant_p((cond)) ? !!(cond) :   \
                               ^
>> mm/vmalloc.c:1484:3: note: in expansion of macro 'if'
      if (area->flags & VM_VPAGES)
      ^

vim +/if +1484 mm/vmalloc.c

^1da177e4 Linus Torvalds    2005-04-16  1468  		return;
^1da177e4 Linus Torvalds    2005-04-16  1469  	}
^1da177e4 Linus Torvalds    2005-04-16  1470  
9a11b49a8 Ingo Molnar       2006-07-03  1471  	debug_check_no_locks_freed(addr, area->size);
3ac7fe5a4 Thomas Gleixner   2008-04-30  1472  	debug_check_no_obj_freed(addr, area->size);
9a11b49a8 Ingo Molnar       2006-07-03  1473  
^1da177e4 Linus Torvalds    2005-04-16  1474  	if (deallocate_pages) {
^1da177e4 Linus Torvalds    2005-04-16  1475  		int i;
^1da177e4 Linus Torvalds    2005-04-16  1476  
^1da177e4 Linus Torvalds    2005-04-16  1477  		for (i = 0; i < area->nr_pages; i++) {
bf53d6f8f Christoph Lameter 2008-02-04  1478  			struct page *page = area->pages[i];
bf53d6f8f Christoph Lameter 2008-02-04  1479  
bf53d6f8f Christoph Lameter 2008-02-04  1480  			BUG_ON(!page);
bf53d6f8f Christoph Lameter 2008-02-04  1481  			__free_page(page);
^1da177e4 Linus Torvalds    2005-04-16  1482  		}
^1da177e4 Linus Torvalds    2005-04-16  1483  
8757d5fa6 Jan Kiszka        2006-07-14 @1484  		if (area->flags & VM_VPAGES)
^1da177e4 Linus Torvalds    2005-04-16  1485  			vfree(area->pages);
^1da177e4 Linus Torvalds    2005-04-16  1486  		else
^1da177e4 Linus Torvalds    2005-04-16  1487  			kfree(area->pages);
^1da177e4 Linus Torvalds    2005-04-16  1488  	}
^1da177e4 Linus Torvalds    2005-04-16  1489  
^1da177e4 Linus Torvalds    2005-04-16  1490  	kfree(area);
^1da177e4 Linus Torvalds    2005-04-16  1491  	return;
^1da177e4 Linus Torvalds    2005-04-16  1492  }

:::::: The code at line 1484 was first introduced by commit
:::::: 8757d5fa6b75e8ea906baf0309d49b980e7f9bc9 [PATCH] mm: fix oom roll-back of __vmalloc_area_node

:::::: TO: Jan Kiszka <jan.kiszka@....de>
:::::: CC: Linus Torvalds <torvalds@...osdl.org>

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