tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git N7
head:   955ae92da3dd3064f127613be863b7d6d8dddf69
commit: 058e44bea52d13b3590944a10fb7209a445f0d03 [27/31] vfs: Implement logging through fs_context
config: openrisc-allnoconfig (attached as .config)
compiler: or1k-linux-gcc (GCC) 6.0.0 20160327 (experimental)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 058e44bea52d13b3590944a10fb7209a445f0d03
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All errors (new ones prefixed by >>):

   fs/fs_context.c: In function 'logfc':
>> fs/fs_context.c:382:3: error: implicit declaration of function 'vprintk_emit' [-Werror=implicit-function-declaration]
      vprintk_emit(0, LOGLEVEL_WARNING, NULL, 0, fmt, va);
      ^~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/vprintk_emit +382 fs/fs_context.c

   368	
   369	/**
   370	 * logfc - Log a message to a filesystem context
   371	 * @fc: The filesystem context to log to.
   372	 * @fmt: The format of the buffer.
   373	 */
   374	void logfc(struct fs_context *fc, const char *fmt, ...)
   375	{
   376		va_list va;
   377	
   378		va_start(va, fmt);
   379	
   380		switch (fmt[0]) {
   381		case 'w':
 > 382			vprintk_emit(0, LOGLEVEL_WARNING, NULL, 0, fmt, va);
   383			break;
   384		case 'e':
   385			vprintk_emit(0, LOGLEVEL_ERR, NULL, 0, fmt, va);
   386			break;
   387		default:
   388			vprintk_emit(0, LOGLEVEL_NOTICE, NULL, 0, fmt, va);
   389			break;
   390		}
   391	
   392		pr_cont("\n");
   393		va_end(va);
   394	}
   395	EXPORT_SYMBOL(logfc);
   396	

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation