Re: [PATCH 1/4] lib: Update LZ4 compressor module

From: kbuild test robot <lkp@intel.com>
To: Sven Schmidt <4sschmid@informatik.uni-hamburg.de>
Cc: kbuild-all@01.org, akpm@linux-foundation.org,
	bongkyu.kim@lge.com, rsalvaterra@gmail.com,
	sergey.senozhatsky@gmail.com, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org, herbert@gondor.apana.org.au,
	davem@davemloft.net, linux-crypto@vger.kernel.org,
	anton@enomsg.org, ccross@android.com, keescook@chromium.org,
	tony.luck@intel.com, phillip@squashfs.org.uk,
	Sven Schmidt <4sschmid@informatik.uni-hamburg.de>
Subject: Re: [PATCH 1/4] lib: Update LZ4 compressor module
Date: Sat, 21 Jan 2017 23:56:28 +0800	[thread overview]
Message-ID: <201701212358.mtnWo78V%fengguang.wu@intel.com> (raw)
In-Reply-To: <1485011351-7463-2-git-send-email-4sschmid@informatik.uni-hamburg.de>

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Hi Sven,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.10-rc4 next-20170120]
[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/Sven-Schmidt/Update-LZ4-compressor-module/20170121-231418
config: i386-randconfig-r0-201703 (attached as .config)
compiler: gcc-5 (Debian 5.4.1-2) 5.4.1 20160904
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: the linux-review/Sven-Schmidt/Update-LZ4-compressor-module/20170121-231418 HEAD 0472409e2a1c442b51502961aa6d83b866218953 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   fs/pstore/platform.c: In function 'allocate_lz4':
>> fs/pstore/platform.c:369:20: error: implicit declaration of function 'lz4_compressbound' [-Werror=implicit-function-declaration]
     big_oops_buf_sz = lz4_compressbound(psinfo->bufsize);
                       ^
   cc1: some warnings being treated as errors

vim +/lz4_compressbound +369 fs/pstore/platform.c

8cfc8ddc Geliang Tang 2016-02-18  363  
8cfc8ddc Geliang Tang 2016-02-18  364  	return outlen;
8cfc8ddc Geliang Tang 2016-02-18  365  }
8cfc8ddc Geliang Tang 2016-02-18  366  
8cfc8ddc Geliang Tang 2016-02-18  367  static void allocate_lz4(void)
8cfc8ddc Geliang Tang 2016-02-18  368  {
8cfc8ddc Geliang Tang 2016-02-18 @369  	big_oops_buf_sz = lz4_compressbound(psinfo->bufsize);
8cfc8ddc Geliang Tang 2016-02-18  370  	big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL);
8cfc8ddc Geliang Tang 2016-02-18  371  	if (big_oops_buf) {
8cfc8ddc Geliang Tang 2016-02-18  372  		workspace = kmalloc(LZ4_MEM_COMPRESS, GFP_KERNEL);

:::::: The code at line 369 was first introduced by commit
:::::: 8cfc8ddc99df9509a46043b14af81f5c6a223eab pstore: add lzo/lz4 compression support

:::::: TO: Geliang Tang <geliangtang@163.com>
:::::: CC: Kees Cook <keescook@chromium.org>

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0-DAY kernel test infrastructure                Open Source Technology Center
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