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Date:   Fri, 6 Apr 2018 03:57:28 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Gary R Hook <gary.hook@....com>
Cc:     kbuild-all@...org, iommu@...ts.linux-foundation.org,
        joro@...tes.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] iommu/amd: Add basic debugfs infrastructure for
 AMD IOMMU

Hi Gary,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on v4.16 next-20180405]
[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/Gary-R-Hook/iommu-Enable-debugfs-exposure-of-the-IOMMU/20180405-151608
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-s2-04060234 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers//iommu/amd_iommu_debugfs.c: In function 'amd_iommu_debugfs_setup':
>> drivers//iommu/amd_iommu_debugfs.c:31:11: error: implicit declaration of function 'iommu_debugfs_setup' [-Werror=implicit-function-declaration]
      d_top = iommu_debugfs_setup();
              ^~~~~~~~~~~~~~~~~~~
   drivers//iommu/amd_iommu_debugfs.c:31:9: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
      d_top = iommu_debugfs_setup();
            ^
   cc1: some warnings being treated as errors

vim +/iommu_debugfs_setup +31 drivers//iommu/amd_iommu_debugfs.c

    20	
    21	void amd_iommu_debugfs_setup(struct amd_iommu *iommu)
    22	{
    23		char name[MAX_NAME_LEN + 1];
    24		struct dentry *d_top;
    25	
    26		if (!debugfs_initialized())
    27			return;
    28	
    29		mutex_lock(&amd_iommu_debugfs_lock);
    30		if (!amd_iommu_debugfs) {
  > 31			d_top = iommu_debugfs_setup();

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

Download attachment ".config.gz" of type "application/gzip" (28736 bytes)

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