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From: kbuild test robot <lkp@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, kbuild-all@01.org
Subject: [driver-core:debugfs_remove_return_value 3/9] arch/powerpc/platforms/pseries/dtl.c:356:19: error: void value not ignored as it ought to be
Date: Tue, 1 Oct 2019 21:36:36 +0800	[thread overview]
Message-ID: <201910012131.S4gFNSxt%lkp@intel.com> (raw)

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git debugfs_remove_return_value
head:   2a00e100fa7b9ee326af19617a84b138c8bd086a
commit: 7f3671a8c54b423d8227d7a58e6dc8c5734cda19 [3/9] debugfs: remove return value of debugfs_create_u32()
config: powerpc-ppc64_defconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 7f3671a8c54b423d8227d7a58e6dc8c5734cda19
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/pseries/dtl.c: In function 'dtl_init':
>> arch/powerpc/platforms/pseries/dtl.c:356:19: error: void value not ignored as it ought to be
     buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400,
                      ^

vim +356 arch/powerpc/platforms/pseries/dtl.c

fc59a3fc8eed3a Jeremy Kerr         2009-03-11  335  
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  336  static int dtl_init(void)
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  337  {
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  338  	struct dentry *event_mask_file, *buf_entries_file;
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  339  	int rc, i;
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  340  
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  341  	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  342  		return -ENODEV;
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  343  
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  344  	/* set up common debugfs structure */
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  345  
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  346  	rc = -ENOMEM;
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  347  	dtl_dir = debugfs_create_dir("dtl", powerpc_debugfs_root);
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  348  	if (!dtl_dir) {
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  349  		printk(KERN_WARNING "%s: can't create dtl root dir\n",
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  350  				__func__);
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  351  		goto err;
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  352  	}
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  353  
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  354  	event_mask_file = debugfs_create_x8("dtl_event_mask", 0600,
fc59a3fc8eed3a Jeremy Kerr         2009-03-11  355  				dtl_dir, &dtl_event_mask);
af442a1baa6d00 Nishanth Aravamudan 2011-05-04 @356  	buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400,

:::::: The code at line 356 was first introduced by commit
:::::: af442a1baa6d00117cc7e7377ce7e6a545268684 powerpc: Ensure dtl buffers do not cross 4k boundary

:::::: TO: Nishanth Aravamudan <nacc@us.ibm.com>
:::::: CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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

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