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Date: Thu, 31 Mar 2022 21:20:15 +0800
From: kernel test robot <lkp@...el.com>
To: Jason Gunthorpe <jgg@...dia.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org
Subject: [jgunthorpe:vfio_v5.18 16/25]
drivers/vfio/pci/vfio_pci_zdev.c:112:5: warning: no previous prototype for
function 'vfio_pci_info_zdev_add_caps'
tree: https://github.com/jgunthorpe/linux vfio_v5.18
head: 2af6f07c2b38e8b37c41347ff9bd2b2e8b32a8d6
commit: cbf96a0bc2aeb156e3bedee832c2c336953d8df2 [16/25] vfio/pci: Split linux/vfio_pci_core.h
config: s390-randconfig-r025-20220331 (https://download.01.org/0day-ci/archive/20220331/202203312150.HOgKwSSc-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 881350a92d821d4f8e4fa648443ed1d17e251188)
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
# https://github.com/jgunthorpe/linux/commit/cbf96a0bc2aeb156e3bedee832c2c336953d8df2
git remote add jgunthorpe https://github.com/jgunthorpe/linux
git fetch --no-tags jgunthorpe vfio_v5.18
git checkout cbf96a0bc2aeb156e3bedee832c2c336953d8df2
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/kernel/ arch/s390/lib/ drivers/vfio/pci/ kernel/locking/ kernel/trace/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/vfio/pci/vfio_pci_zdev.c:9:
In file included from include/linux/io.h:13:
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:37:59: 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/vfio/pci/vfio_pci_zdev.c:9:
In file included from include/linux/io.h:13:
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:35:59: 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/vfio/pci/vfio_pci_zdev.c:9:
In file included from include/linux/io.h:13:
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/vfio/pci/vfio_pci_zdev.c:112:5: warning: no previous prototype for function 'vfio_pci_info_zdev_add_caps' [-Wmissing-prototypes]
int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
^
drivers/vfio/pci/vfio_pci_zdev.c:112:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
^
static
13 warnings generated.
vim +/vfio_pci_info_zdev_add_caps +112 drivers/vfio/pci/vfio_pci_zdev.c
e6b817d4b8217a Matthew Rosato 2020-10-07 108
e6b817d4b8217a Matthew Rosato 2020-10-07 109 /*
e6b817d4b8217a Matthew Rosato 2020-10-07 110 * Add all supported capabilities to the VFIO_DEVICE_GET_INFO capability chain.
e6b817d4b8217a Matthew Rosato 2020-10-07 111 */
536475109c8284 Max Gurtovoy 2021-08-26 @112 int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
:::::: The code at line 112 was first introduced by commit
:::::: 536475109c82841126ca341ef0f138e7298880c1 vfio/pci: Rename vfio_pci_device to vfio_pci_core_device
:::::: TO: Max Gurtovoy <mgurtovoy@...dia.com>
:::::: CC: Alex Williamson <alex.williamson@...hat.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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