[tip:irq/urgent 1/1] drivers/pci/msi/msi.c:763:18: error: use of undeclared identifier 'nvec'; did you mean 'nvev'?

From: kernel test robot
Date: Sat Apr 15 2023 - 20:15:07 EST

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In reply to: kernel test robot: "[tip:irq/urgent 1/1] drivers/pci/msi/msi.c:763:18: error: use of undeclared identifier 'nvec'; did you mean 'nvev'?"
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/urgent
head: 84d9651e13fb9820041d19262a55906851524c0f
commit: 84d9651e13fb9820041d19262a55906851524c0f [1/1] PCI/MSI: Remove over-zealous hardware size check in pci_msix_validate_entries()
config: s390-randconfig-r035-20230416 (https://download.01.org/0day-ci/archive/20230416/202304160844.cCgXqLn2-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 9638da200e00bd069e6dd63604e14cbafede9324)
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/tip/tip.git/commit/?id=84d9651e13fb9820041d19262a55906851524c0f
git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
git fetch --no-tags tip irq/urgent
git checkout 84d9651e13fb9820041d19262a55906851524c0f
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/pci/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304160844.cCgXqLn2-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

In file included from drivers/pci/msi/msi.c:11:
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:75:
include/asm-generic/io.h:547:31: 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:560:61: 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/pci/msi/msi.c:11:
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:75:
include/asm-generic/io.h:573:61: 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/pci/msi/msi.c:11:
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:75:
include/asm-generic/io.h:584:33: 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:594:59: 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:604:59: 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:692:20: 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:700:20: 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:708:20: 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:717:21: 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:726:21: 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:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/pci/msi/msi.c:763:18: error: use of undeclared identifier 'nvec'; did you mean 'nvev'?
for (i = 0; i < nvec; i++) {
^~~~
nvev
drivers/pci/msi/msi.c:753:92: note: 'nvev' declared here
static bool pci_msix_validate_entries(struct pci_dev *dev, struct msix_entry *entries, int nvev)
^
drivers/pci/msi/msi.c:765:23: error: use of undeclared identifier 'nvec'; did you mean 'nvev'?
for (j = i + 1; j < nvec; j++) {
^~~~
nvev
drivers/pci/msi/msi.c:753:92: note: 'nvev' declared here
static bool pci_msix_validate_entries(struct pci_dev *dev, struct msix_entry *entries, int nvev)
^
12 warnings and 2 errors generated.

vim +763 drivers/pci/msi/msi.c

^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 752
84d9651e13fb98 drivers/pci/msi/msi.c Thomas Gleixner 2023-04-10 753 static bool pci_msix_validate_entries(struct pci_dev *dev, struct msix_entry *entries, int nvev)
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 754 {
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 755 bool nogap;
ded86d8d37736d drivers/pci/msi.c Eric W. Biederman 2007-01-28 756 int i, j;
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 757
bab65e48cb064d drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 758 if (!entries)
bab65e48cb064d drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 759 return true;
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 760
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 761 nogap = pci_msi_domain_supports(dev, MSI_FLAG_MSIX_CONTIGUOUS, DENY_LEGACY);
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 762
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 @763 for (i = 0; i < nvec; i++) {
bab65e48cb064d drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 764 /* Check for duplicate entries */
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 765 for (j = i + 1; j < nvec; j++) {
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 766 if (entries[i].entry == entries[j].entry)
bab65e48cb064d drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 767 return false;
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 768 }
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 769 /* Check for unsupported gaps */
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 770 if (nogap && entries[i].entry != i)
4644d22eb673f1 drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 771 return false;
^1da177e4c3f41 drivers/pci/msi.c Linus Torvalds 2005-04-16 772 }
bab65e48cb064d drivers/pci/msi/msi.c Thomas Gleixner 2022-11-11 773 return true;
3ac020e0ca8bef drivers/pci/msi.c Christoph Hellwig 2016-07-12 774 }
7bd007e480672c drivers/pci/msi.c Eric W. Biederman 2006-10-04 775

:::::: The code at line 763 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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