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From: kernel test robot <lkp@intel.com>
To: Ryan Taylor <Ryan.Taylor@amd.com>
Cc: clang-built-linux@googlegroups.com, kbuild-all@lists.01.org,
	linux-kernel@vger.kernel.org,
	Alex Deucher <alexander.deucher@amd.com>
Subject: [agd5f:amd-staging-drm-next 417/435] drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:399:5: warning: no previous prototype for function 'amdgpu_vkms_output_init'
Date: Wed, 4 Aug 2021 13:24:40 +0800	[thread overview]
Message-ID: <202108041332.miH3gsYM-lkp@intel.com> (raw)

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tree:   https://gitlab.freedesktop.org/agd5f/linux.git amd-staging-drm-next
head:   2f56b0d631eba0e76cfc789d85cc5632256ad42d
commit: 16dcf291698ca37e89c481ae622cd5dc50afa6f4 [417/435] drm/amdgpu: replace dce_virtual with amdgpu_vkms (v3)
config: s390-randconfig-r011-20210803 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4f71f59bf3d9914188a11d0c41bedbb339d36ff5)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f amd-staging-drm-next
        git checkout 16dcf291698ca37e89c481ae622cd5dc50afa6f4
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 

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

All warnings (new ones prefixed by >>):

   In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:3:
   In file included from include/drm/drm_atomic_helper.h:31:
   In file included from include/drm/drm_crtc.h:31:
   In file included from include/linux/fb.h:17:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
                                                             ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
   #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
                                                        ^
   In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:3:
   In file included from include/drm/drm_atomic_helper.h:31:
   In file included from include/drm/drm_crtc.h:31:
   In file included from include/linux/fb.h:17:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
                                                             ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
   #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
                                                        ^
   In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:3:
   In file included from include/drm/drm_atomic_helper.h:31:
   In file included from include/drm/drm_crtc.h:31:
   In file included from include/linux/fb.h:17:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsb(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsw(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsl(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesb(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesw(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
>> drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:399:5: warning: no previous prototype for function 'amdgpu_vkms_output_init' [-Wmissing-prototypes]
   int amdgpu_vkms_output_init(struct drm_device *dev,
       ^
   drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c:399:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int amdgpu_vkms_output_init(struct drm_device *dev,
   ^
   static 
   13 warnings generated.


vim +/amdgpu_vkms_output_init +399 drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c

ba5317109d0ce7 Ryan Taylor 2021-06-07  398  
ba5317109d0ce7 Ryan Taylor 2021-06-07 @399  int amdgpu_vkms_output_init(struct drm_device *dev,
ba5317109d0ce7 Ryan Taylor 2021-06-07  400  			    struct amdgpu_vkms_output *output, int index)
ba5317109d0ce7 Ryan Taylor 2021-06-07  401  {
ba5317109d0ce7 Ryan Taylor 2021-06-07  402  	struct drm_connector *connector = &output->connector;
ba5317109d0ce7 Ryan Taylor 2021-06-07  403  	struct drm_encoder *encoder = &output->encoder;
ba5317109d0ce7 Ryan Taylor 2021-06-07  404  	struct drm_crtc *crtc = &output->crtc;
ba5317109d0ce7 Ryan Taylor 2021-06-07  405  	struct drm_plane *primary, *cursor = NULL;
ba5317109d0ce7 Ryan Taylor 2021-06-07  406  	int ret;
ba5317109d0ce7 Ryan Taylor 2021-06-07  407  
ba5317109d0ce7 Ryan Taylor 2021-06-07  408  	primary = amdgpu_vkms_plane_init(dev, DRM_PLANE_TYPE_PRIMARY, index);
ba5317109d0ce7 Ryan Taylor 2021-06-07  409  	if (IS_ERR(primary))
ba5317109d0ce7 Ryan Taylor 2021-06-07  410  		return PTR_ERR(primary);
ba5317109d0ce7 Ryan Taylor 2021-06-07  411  
ba5317109d0ce7 Ryan Taylor 2021-06-07  412  	ret = amdgpu_vkms_crtc_init(dev, crtc, primary, cursor);
ba5317109d0ce7 Ryan Taylor 2021-06-07  413  	if (ret)
ba5317109d0ce7 Ryan Taylor 2021-06-07  414  		goto err_crtc;
ba5317109d0ce7 Ryan Taylor 2021-06-07  415  
ba5317109d0ce7 Ryan Taylor 2021-06-07  416  	ret = drm_connector_init(dev, connector, &amdgpu_vkms_connector_funcs,
ba5317109d0ce7 Ryan Taylor 2021-06-07  417  				 DRM_MODE_CONNECTOR_VIRTUAL);
ba5317109d0ce7 Ryan Taylor 2021-06-07  418  	if (ret) {
ba5317109d0ce7 Ryan Taylor 2021-06-07  419  		DRM_ERROR("Failed to init connector\n");
ba5317109d0ce7 Ryan Taylor 2021-06-07  420  		goto err_connector;
ba5317109d0ce7 Ryan Taylor 2021-06-07  421  	}
ba5317109d0ce7 Ryan Taylor 2021-06-07  422  
ba5317109d0ce7 Ryan Taylor 2021-06-07  423  	drm_connector_helper_add(connector, &amdgpu_vkms_conn_helper_funcs);
ba5317109d0ce7 Ryan Taylor 2021-06-07  424  
ba5317109d0ce7 Ryan Taylor 2021-06-07  425  	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
ba5317109d0ce7 Ryan Taylor 2021-06-07  426  	if (ret) {
ba5317109d0ce7 Ryan Taylor 2021-06-07  427  		DRM_ERROR("Failed to init encoder\n");
ba5317109d0ce7 Ryan Taylor 2021-06-07  428  		goto err_encoder;
ba5317109d0ce7 Ryan Taylor 2021-06-07  429  	}
ba5317109d0ce7 Ryan Taylor 2021-06-07  430  	encoder->possible_crtcs = 1 << index;
ba5317109d0ce7 Ryan Taylor 2021-06-07  431  
ba5317109d0ce7 Ryan Taylor 2021-06-07  432  	ret = drm_connector_attach_encoder(connector, encoder);
ba5317109d0ce7 Ryan Taylor 2021-06-07  433  	if (ret) {
ba5317109d0ce7 Ryan Taylor 2021-06-07  434  		DRM_ERROR("Failed to attach connector to encoder\n");
ba5317109d0ce7 Ryan Taylor 2021-06-07  435  		goto err_attach;
ba5317109d0ce7 Ryan Taylor 2021-06-07  436  	}
ba5317109d0ce7 Ryan Taylor 2021-06-07  437  
ba5317109d0ce7 Ryan Taylor 2021-06-07  438  	drm_mode_config_reset(dev);
ba5317109d0ce7 Ryan Taylor 2021-06-07  439  
ba5317109d0ce7 Ryan Taylor 2021-06-07  440  	return 0;
ba5317109d0ce7 Ryan Taylor 2021-06-07  441  
ba5317109d0ce7 Ryan Taylor 2021-06-07  442  err_attach:
ba5317109d0ce7 Ryan Taylor 2021-06-07  443  	drm_encoder_cleanup(encoder);
ba5317109d0ce7 Ryan Taylor 2021-06-07  444  
ba5317109d0ce7 Ryan Taylor 2021-06-07  445  err_encoder:
ba5317109d0ce7 Ryan Taylor 2021-06-07  446  	drm_connector_cleanup(connector);
ba5317109d0ce7 Ryan Taylor 2021-06-07  447  
ba5317109d0ce7 Ryan Taylor 2021-06-07  448  err_connector:
ba5317109d0ce7 Ryan Taylor 2021-06-07  449  	drm_crtc_cleanup(crtc);
ba5317109d0ce7 Ryan Taylor 2021-06-07  450  
ba5317109d0ce7 Ryan Taylor 2021-06-07  451  err_crtc:
ba5317109d0ce7 Ryan Taylor 2021-06-07  452  	drm_plane_cleanup(primary);
ba5317109d0ce7 Ryan Taylor 2021-06-07  453  
ba5317109d0ce7 Ryan Taylor 2021-06-07  454  	return ret;
ba5317109d0ce7 Ryan Taylor 2021-06-07  455  }
16dcf291698ca3 Ryan Taylor 2021-06-18  456  

:::::: The code at line 399 was first introduced by commit
:::::: ba5317109d0ce7809831abfcea9b8157464b263f drm/amdgpu: create amdgpu_vkms (v4)

:::::: TO: Ryan Taylor <Ryan.Taylor@amd.com>
:::::: CC: Ryan Taylor <Ryan.Taylor@amd.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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                 reply	other threads:[~2021-08-04  5:25 UTC|newest]

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