linux-kernel - Re: [PATCH v2] block: flush queued bios when the process blocks

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Message-ID: <201510091930.OnZI9jzP%fengguang.wu@intel.com>
Date:	Fri, 9 Oct 2015 19:58:16 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	kbuild-all@...org, Mikulas Patocka <mpatocka@...hat.com>,
	Jens Axboe <axboe@...nel.dk>, kent.overstreet@...il.com,
	dm-devel@...hat.com, linux-kernel@...r.kernel.org,
	"Alasdair G. Kergon" <agk@...hat.com>
Subject: Re: [PATCH v2] block: flush queued bios when the process blocks

Hi Mike,

[auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore]

config: x86_64-lkp (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   In file included from include/linux/linkage.h:4:0,
                    from include/linux/fs.h:4,
                    from include/linux/highmem.h:4,
                    from include/linux/bio.h:23,
                    from drivers/md/bcache/bcache.h:181,
                    from drivers/md/bcache/btree.c:23:
   drivers/md/bcache/btree.c: In function '__bch_btree_node_write':
>> drivers/md/bcache/btree.c:454:16: error: 'struct task_struct' has no member named 'bio_list'
     BUG_ON(current->bio_list);
                   ^
   include/linux/compiler.h:166:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   drivers/md/bcache/btree.c:454:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(current->bio_list);
     ^
   drivers/md/bcache/btree.c: In function 'bch_btree_leaf_dirty':
   drivers/md/bcache/btree.c:548:14: error: 'struct task_struct' has no member named 'bio_list'
         !current->bio_list)
                 ^
   In file included from include/linux/linkage.h:4:0,
                    from include/linux/fs.h:4,
                    from include/linux/highmem.h:4,
                    from include/linux/bio.h:23,
                    from drivers/md/bcache/bcache.h:181,
                    from drivers/md/bcache/btree.c:23:
   drivers/md/bcache/btree.c: In function 'mca_alloc':
   drivers/md/bcache/btree.c:893:16: error: 'struct task_struct' has no member named 'bio_list'
     BUG_ON(current->bio_list);
                   ^
   include/linux/compiler.h:166:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   drivers/md/bcache/btree.c:893:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(current->bio_list);
     ^
   drivers/md/bcache/btree.c: In function 'bch_btree_node_get':
   drivers/md/bcache/btree.c:980:14: error: 'struct task_struct' has no member named 'bio_list'
      if (current->bio_list)
                 ^
   drivers/md/bcache/btree.c: In function 'bch_btree_insert_node':
   drivers/md/bcache/btree.c:2131:13: error: 'struct task_struct' has no member named 'bio_list'
     if (current->bio_list) {
                ^
   In file included from include/linux/linkage.h:4:0,
                    from include/linux/fs.h:4,
                    from include/linux/highmem.h:4,
                    from include/linux/bio.h:23,
                    from drivers/md/bcache/bcache.h:181,
                    from drivers/md/bcache/btree.c:23:
   drivers/md/bcache/btree.c: In function 'bch_btree_insert':
   drivers/md/bcache/btree.c:2211:16: error: 'struct task_struct' has no member named 'bio_list'
     BUG_ON(current->bio_list);
                   ^
   include/linux/compiler.h:166:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   drivers/md/bcache/btree.c:2211:2: note: in expansion of macro 'BUG_ON'
     BUG_ON(current->bio_list);
     ^
   drivers/md/bcache/btree.c: In function 'bch_btree_insert_node':
   drivers/md/bcache/btree.c:2147:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^

vim +454 drivers/md/bcache/btree.c

ee811287 Kent Overstreet 2013-12-17  448  	struct bset *i = btree_bset_last(b);
cafe5635 Kent Overstreet 2013-03-23  449  
2a285686 Kent Overstreet 2014-03-04  450  	lockdep_assert_held(&b->write_lock);
2a285686 Kent Overstreet 2014-03-04  451  
c37511b8 Kent Overstreet 2013-04-26  452  	trace_bcache_btree_write(b);
c37511b8 Kent Overstreet 2013-04-26  453  
cafe5635 Kent Overstreet 2013-03-23 @454  	BUG_ON(current->bio_list);
57943511 Kent Overstreet 2013-04-25  455  	BUG_ON(b->written >= btree_blocks(b));
57943511 Kent Overstreet 2013-04-25  456  	BUG_ON(b->written && !i->keys);
ee811287 Kent Overstreet 2013-12-17  457  	BUG_ON(btree_bset_first(b)->seq != i->seq);

:::::: The code at line 454 was first introduced by commit
:::::: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 bcache: A block layer cache

:::::: TO: Kent Overstreet <koverstreet@...gle.com>
:::::: CC: Kent Overstreet <koverstreet@...gle.com>

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