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Message-ID: <202203310219.HvAOIHBC-lkp@intel.com>
Date: Thu, 31 Mar 2022 02:46:44 +0800
From: kernel test robot <lkp@...el.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: drivers/media/platform/intel/pxa_camera.c:2449:34: warning: unused
variable 'pxa_camera_of_match'
Hi Mauro,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d888c83fcec75194a8a48ccd283953bdba7b2550
commit: 95495f2aa9d8df1a7697bab24118544d3568f41d media: platform: place Intel drivers on a separate dir
date: 2 weeks ago
config: s390-randconfig-r036-20220330 (https://download.01.org/0day-ci/archive/20220331/202203310219.HvAOIHBC-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d)
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=95495f2aa9d8df1a7697bab24118544d3568f41d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 95495f2aa9d8df1a7697bab24118544d3568f41d
# 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 drivers/media/platform/intel/
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/media/platform/intel/pxa_camera.c:12:
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/media/platform/intel/pxa_camera.c:12:
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/media/platform/intel/pxa_camera.c:12:
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/media/platform/intel/pxa_camera.c:2449:34: warning: unused variable 'pxa_camera_of_match' [-Wunused-const-variable]
static const struct of_device_id pxa_camera_of_match[] = {
^
13 warnings generated.
vim +/pxa_camera_of_match +2449 drivers/media/platform/intel/pxa_camera.c
7254026cedd42d drivers/media/video/pxa_camera.c Guennadi Liakhovetski 2011-06-29 2448
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 @2449 static const struct of_device_id pxa_camera_of_match[] = {
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2450 { .compatible = "marvell,pxa270-qci", },
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2451 {},
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2452 };
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2453 MODULE_DEVICE_TABLE(of, pxa_camera_of_match);
e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2454
:::::: The code at line 2449 was first introduced by commit
:::::: e9a1d94fa85542d4f3046ac82d234a3c8349c948 [media] media: pxa_camera device-tree support
:::::: TO: Robert Jarzmik <robert.jarzmik@...e.fr>
:::::: CC: Mauro Carvalho Chehab <m.chehab@...sung.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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