linux-kernel - Re: [PATCH v2 2/8] block: move two bvec structure into bvec.h

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Message-ID: <201604040222.awrue5lX%fengguang.wu@intel.com>
Date:	Mon, 4 Apr 2016 02:12:25 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	kbuild-all@...org, Jens Axboe <axboe@...com>,
	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Anton Altaparmakov <anton@...era.com>, xfs@....sgi.com,
	Dave Chinner <david@...morbit.com>, drbd-dev@...ts.linbit.com,
	Philipp Reisner <philipp.reisner@...bit.com>,
	Lars Ellenberg <lars.ellenberg@...bit.com>,
	Boaz Harrosh <boaz@...xistor.com>,
	Ming Lei <ming.lei@...onical.com>
Subject: Re: [PATCH v2 2/8] block: move two bvec structure into bvec.h

Hi Ming,

[auto build test ERROR on block/for-next]
[also build test ERROR on v4.6-rc2 next-20160401]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Ming-Lei/block-prepare-for-multipage-bvecs/20160404-003648
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: arm-at91_dt_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
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   In file included from include/linux/blk_types.h:9:0,
                    from arch/arm/include/asm/io.h:28,
                    from drivers/input/joydev.c:15:
   include/linux/bvec.h: In function 'bvec_iter_advance':
>> include/linux/bvec.h:69:2: error: implicit declaration of function 'WARN_ONCE' [-Werror=implicit-function-declaration]
     WARN_ONCE(bytes > iter->bi_size,
     ^
>> include/linux/bvec.h:73:3: error: implicit declaration of function 'min' [-Werror=implicit-function-declaration]
      unsigned len = min(bytes, bvec_iter_len(bv, *iter));
      ^
   cc1: some warnings being treated as errors

vim +/WARN_ONCE +69 include/linux/bvec.h

0d61ba15 Ming Lei 2016-04-04  63  	.bv_offset	= bvec_iter_offset((bvec), (iter)),	\
0d61ba15 Ming Lei 2016-04-04  64  })
0d61ba15 Ming Lei 2016-04-04  65  
0d61ba15 Ming Lei 2016-04-04  66  static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter,
0d61ba15 Ming Lei 2016-04-04  67  				     unsigned bytes)
0d61ba15 Ming Lei 2016-04-04  68  {
0d61ba15 Ming Lei 2016-04-04 @69  	WARN_ONCE(bytes > iter->bi_size,
0d61ba15 Ming Lei 2016-04-04  70  		  "Attempted to advance past end of bvec iter\n");
0d61ba15 Ming Lei 2016-04-04  71  
0d61ba15 Ming Lei 2016-04-04  72  	while (bytes) {
0d61ba15 Ming Lei 2016-04-04 @73  		unsigned len = min(bytes, bvec_iter_len(bv, *iter));
0d61ba15 Ming Lei 2016-04-04  74  
0d61ba15 Ming Lei 2016-04-04  75  		bytes -= len;
0d61ba15 Ming Lei 2016-04-04  76  		iter->bi_size -= len;

:::::: The code at line 69 was first introduced by commit
:::::: 0d61ba15b7eb4a7478dae53947aaaf898a1bbf30 block: move bvec iterator into include/linux/bvec.h

:::::: TO: Ming Lei <ming.lei@...onical.com>
:::::: CC: 0day robot <fengguang.wu@...el.com>

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