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Message-ID: <202112260445.8QUwFOXX-lkp@intel.com>
Date: Sun, 26 Dec 2021 04:23:32 +0800
From: kernel test robot <lkp@...el.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>
Subject: drivers/pci/controller/dwc/pci-keystone.c:1064:34: warning: unused
variable 'ks_pcie_of_match'
Hi Masahiro,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b927dfc67d05a72167ab980c375ed98b2ee9c2c6
commit: ea29b20a828511de3348334e529a3d046a180416 init/Kconfig: make COMPILE_TEST depend on HAS_IOMEM
date: 10 months ago
config: s390-randconfig-r013-20211226 (https://download.01.org/0day-ci/archive/20211226/202112260445.8QUwFOXX-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a9e8b1ee7fd44b53c555a7823ae8fd1a8209c520)
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=ea29b20a828511de3348334e529a3d046a180416
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ea29b20a828511de3348334e529a3d046a180416
# 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/pci/controller/dwc/ drivers/s390/net/
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:19:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
^
In file included from drivers/pci/controller/dwc/pci-keystone.c:17:
In file included from include/linux/irqchip/chained_irq.h:10:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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:20:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
^
In file included from drivers/pci/controller/dwc/pci-keystone.c:17:
In file included from include/linux/irqchip/chained_irq.h:10:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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/pci/controller/dwc/pci-keystone.c:17:
In file included from include/linux/irqchip/chained_irq.h:10:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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/pci/controller/dwc/pci-keystone.c:17:
In file included from include/linux/irqchip/chained_irq.h:10:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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/pci/controller/dwc/pci-keystone.c:17:
In file included from include/linux/irqchip/chained_irq.h:10:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
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/pci/controller/dwc/pci-keystone.c:1064:34: warning: unused variable 'ks_pcie_of_match' [-Wunused-const-variable]
static const struct of_device_id ks_pcie_of_match[] = {
^
21 warnings generated.
vim +/ks_pcie_of_match +1064 drivers/pci/controller/dwc/pci-keystone.c
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1063
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 @1064 static const struct of_device_id ks_pcie_of_match[] = {
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1065 {
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1066 .type = "pci",
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1067 .data = &ks_pcie_rc_of_data,
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1068 .compatible = "ti,keystone-pcie",
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1069 },
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1070 {
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1071 .data = &ks_pcie_am654_rc_of_data,
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1072 .compatible = "ti,am654-pcie-rc",
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1073 },
23284ad677a94f Kishon Vijay Abraham I 2019-03-25 1074 {
23284ad677a94f Kishon Vijay Abraham I 2019-03-25 1075 .data = &ks_pcie_am654_ep_of_data,
23284ad677a94f Kishon Vijay Abraham I 2019-03-25 1076 .compatible = "ti,am654-pcie-ep",
23284ad677a94f Kishon Vijay Abraham I 2019-03-25 1077 },
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1078 { },
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1079 };
18b0415bc802a8 Kishon Vijay Abraham I 2019-03-25 1080
:::::: The code at line 1064 was first introduced by commit
:::::: 18b0415bc802a8bab5dedba5ae2757e83259e6ee PCI: keystone: Add support for PCIe RC in AM654x Platforms
:::::: TO: Kishon Vijay Abraham I <kishon@...com>
:::::: CC: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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