linux-kernel - Re: [PATCH v5 1/2] iommu - Enable debugfs exposure of IOMMU driver internals

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Message-ID: <201805080700.Jm8moLQz%fengguang.wu@intel.com>
Date:   Tue, 8 May 2018 07:47:44 +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 v5 1/2] iommu - Enable debugfs exposure of IOMMU driver
 internals

Hi Gary,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on v4.17-rc4 next-20180507]
[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-IOMMU-driver-internals/20180508-062918
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-x016-201818 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/intel-iommu.h:32:0,
                    from drivers/gpu/drm/i915/i915_drv.h:41,
                    from drivers/gpu/drm/i915/i915_oa_bxt.c:31:
   include/linux/iommu.h: In function 'iommu_debugfs_new_driver_dir':
>> include/linux/iommu.h:706:8: error: parameter name omitted
    struct dentry *iommu_debugfs_new_driver_dir(char *) {};
           ^~~~~~
   In file included from include/linux/intel-iommu.h:32:0,
                    from drivers/gpu/drm/i915/i915_drv.h:41,
                    from drivers/gpu/drm/i915/i915_oa_bxt.c:31:
>> include/linux/iommu.h:706:8: warning: control reaches end of non-void function [-Wreturn-type]
    struct dentry *iommu_debugfs_new_driver_dir(char *) {};
           ^~~~~~

vim +706 include/linux/iommu.h

   700	
   701	#ifdef CONFIG_IOMMU_DEBUGFS
   702	void iommu_debugfs_setup(void);
   703	struct dentry *iommu_debugfs_new_driver_dir(char *);
   704	#else
   705	static inline void iommu_debugfs_setup(void) {}
 > 706	struct dentry *iommu_debugfs_new_driver_dir(char *) {};
   707	#endif
   708	

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

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