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Message-ID: <202212111713.NFKTF7Wm-lkp@intel.com>
Date: Sun, 11 Dec 2022 17:34:02 +0800
From: kernel test robot <lkp@...el.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:1175:34:
warning: unused variable 'c8sectpfe_match'
Hi Mauro,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4cee37b3a4e68c42b867c87a6218e11bc571ba66
commit: e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2 media: platform: place stm32/ and sti/ under st/ dir
date: 9 months ago
config: s390-randconfig-r011-20221211
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/media/platform/st/sti/c8sectpfe/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:16:
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: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/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:16:
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: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/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:16:
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: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/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:1175:34: warning: unused variable 'c8sectpfe_match' [-Wunused-const-variable]
static const struct of_device_id c8sectpfe_match[] = {
^
13 warnings generated.
vim +/c8sectpfe_match +1175 drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1174
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 @1175 static const struct of_device_id c8sectpfe_match[] = {
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1176 { .compatible = "st,stih407-c8sectpfe" },
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1177 { /* sentinel */ },
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1178 };
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1179 MODULE_DEVICE_TABLE(of, c8sectpfe_match);
c5f5d0f99794cf drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 1180
:::::: The code at line 1175 was first introduced by commit
:::::: c5f5d0f99794cfb675ecacfe37a1b33b352b9752 [media] c8sectpfe: STiH407/10 Linux DVB demux support
:::::: TO: Peter Griffin <peter.griffin@...aro.org>
:::::: CC: Mauro Carvalho Chehab <mchehab@....samsung.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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