linux-kernel - arch/s390/kvm/pci.h:47:69: sparse: sparse: Using plain integer as NULL pointer

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Message-ID: <202208131353.8ChUuYVb-lkp@intel.com>
Date:   Sat, 13 Aug 2022 13:32:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Matthew Rosato <mjrosato@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Pierre Morel <pmorel@...ux.ibm.com>
Subject: arch/s390/kvm/pci.h:47:69: sparse: sparse: Using plain integer as
 NULL pointer

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   69dac8e431af26173ca0a1ebc87054e01c585bcc
commit: 73f91b004321f2510fa79e66035dbbf1870fcf56 KVM: s390: pci: enable host forwarding of Adapter Event Notifications
date:   5 weeks ago
config: s390-randconfig-s053-20220811 (https://download.01.org/0day-ci/archive/20220813/202208131353.8ChUuYVb-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=73f91b004321f2510fa79e66035dbbf1870fcf56
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 73f91b004321f2510fa79e66035dbbf1870fcf56
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

sparse warnings: (new ones prefixed by >>)
   arch/s390/kvm/interrupt.c: note: in included file:
>> arch/s390/kvm/pci.h:47:69: sparse: sparse: Using plain integer as NULL pointer
   arch/s390/kvm/pci.h:48:32: sparse: sparse: Using plain integer as NULL pointer
   arch/s390/kvm/pci.h:49:24: sparse: sparse: Using plain integer as NULL pointer

vim +47 arch/s390/kvm/pci.h

    43	
    44	static inline struct kvm *kvm_s390_pci_si_to_kvm(struct zpci_aift *aift,
    45							 unsigned long si)
    46	{
  > 47		if (!IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM) || aift->kzdev == 0 ||
    48		    aift->kzdev[si] == 0)
    49			return 0;
    50		return aift->kzdev[si]->kvm;
    51	};
    52	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp