Hi Casey, I love your patch! Perhaps something to improve: [auto build test WARNING on pcmoore-audit/next] [also build test WARNING on nf/master linus/master v5.14-rc2 next-20210723] [cannot apply to nf-next/master security/next-testing] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Casey-Schaufler/LSM-Infrastructu... base: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit.git next config: i386-randconfig-s002-20210722 (attached as .config) compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/7a5105a372e90078ee746d774c21979cf... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Casey-Schaufler/LSM-Infrastructure-management-of-the-sock-security/20210722-094735 git checkout 7a5105a372e90078ee746d774c21979cfb9fcaf6 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/audit.c:2181:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ kernel/audit.c:2181:9: sparse: expected struct spinlock [usertype] *lock kernel/audit.c:2181:9: sparse: got struct spinlock [noderef] __rcu * kernel/audit.c:2184:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@ kernel/audit.c:2184:40: sparse: expected struct spinlock [usertype] *lock kernel/audit.c:2184:40: sparse: got struct spinlock [noderef] __rcu * vim +/audit_sig_lsm +128 kernel/audit.c 124 125 /* The identity of the user shutting down the audit system. */ 126 static kuid_t audit_sig_uid = INVALID_UID; 127 static pid_t audit_sig_pid = -1; 129 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org