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Message-ID: <202101170734.tDpw0eHb-lkp@intel.com>
Date: Sun, 17 Jan 2021 07:23:25 +0800
From: kernel test robot <lkp@...el.com>
To: Pavel Šimerda <code@...erda.eu>,
netdev@...r.kernel.org
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
Pavel Šimerda <code@...erda.eu>
Subject: Re: [PATCH net-next] net: mdio: access c22 registers via debugfs
Hi "Pavel,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Pavel-imerda/net-mdio-access-c22-registers-via-debugfs/20210117-053409
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 9ab7e76aefc97a9aa664accb59d6e8dc5e52514a
config: s390-randconfig-r015-20210117 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 2082b10d100e8dbaffc2ba8f497db5d2ab61beb2)
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/0day-ci/linux/commit/22d74f4896850840331d36d6867f7bc5ce728bbd
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Pavel-imerda/net-mdio-access-c22-registers-via-debugfs/20210117-053409
git checkout 22d74f4896850840331d36d6867f7bc5ce728bbd
# 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@...el.com>
All warnings (new ones prefixed by >>):
^
include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
^
In file included from drivers/net/phy/mdio-debugfs.c:3:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
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:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
^
In file included from drivers/net/phy/mdio-debugfs.c:3:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
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:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
^
In file included from drivers/net/phy/mdio-debugfs.c:3:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
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:120:12: note: expanded from macro '__swab32'
__fswab32(x))
^
In file included from drivers/net/phy/mdio-debugfs.c:3:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
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/net/phy/mdio-debugfs.c:170:6: warning: no previous prototype for function 'mdio_debugfs_add' [-Wmissing-prototypes]
void mdio_debugfs_add(struct mii_bus *bus)
^
drivers/net/phy/mdio-debugfs.c:170:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void mdio_debugfs_add(struct mii_bus *bus)
^
static
>> drivers/net/phy/mdio-debugfs.c:177:6: warning: no previous prototype for function 'mdio_debugfs_remove' [-Wmissing-prototypes]
void mdio_debugfs_remove(struct mii_bus *bus)
^
drivers/net/phy/mdio-debugfs.c:177:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void mdio_debugfs_remove(struct mii_bus *bus)
^
static
>> drivers/net/phy/mdio-debugfs.c:184:12: warning: no previous prototype for function 'mdio_debugfs_init' [-Wmissing-prototypes]
int __init mdio_debugfs_init(void)
^
drivers/net/phy/mdio-debugfs.c:184:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int __init mdio_debugfs_init(void)
^
static
>> drivers/net/phy/mdio-debugfs.c:192:13: warning: no previous prototype for function 'mdio_debugfs_exit' [-Wmissing-prototypes]
void __exit mdio_debugfs_exit(void)
^
drivers/net/phy/mdio-debugfs.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __exit mdio_debugfs_exit(void)
^
static
24 warnings generated.
vim +/mdio_debugfs_add +170 drivers/net/phy/mdio-debugfs.c
169
> 170 void mdio_debugfs_add(struct mii_bus *bus)
171 {
172 bus->debugfs_dentry = debugfs_create_dir(dev_name(&bus->dev), mdio_debugfs_dentry);
173 debugfs_create_file("control", 0600, bus->debugfs_dentry, bus, &mdio_debug_fops);
174 }
175 EXPORT_SYMBOL_GPL(mdio_debugfs_add);
176
> 177 void mdio_debugfs_remove(struct mii_bus *bus)
178 {
179 debugfs_remove(bus->debugfs_dentry);
180 bus->debugfs_dentry = NULL;
181 }
182 EXPORT_SYMBOL_GPL(mdio_debugfs_remove);
183
> 184 int __init mdio_debugfs_init(void)
185 {
186 mdio_debugfs_dentry = debugfs_create_dir("mdio", NULL);
187
188 return PTR_ERR_OR_ZERO(mdio_debugfs_dentry);
189 }
190 module_init(mdio_debugfs_init);
191
> 192 void __exit mdio_debugfs_exit(void)
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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