[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'

From: kernel test robot
Date: Wed Aug 04 2021 - 01:25:17 EST

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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@xxxxxxxxx>

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@xxxxxxx>
:::::: CC: Ryan Taylor <Ryan.Taylor@xxxxxxx>

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

Attachment: .config.gz
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Next message: Christophe Leroy: "Re: [PATCH 1/2] powerpc/bug: Remove specific powerpc BUG_ON() and WARN_ON() on PPC32"
Previous message: Chunfeng Yun: "Re: [PATCH 08/11] usb: xhci-mtk: update fs bus bandwidth by bw_budget_table"
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