Hi Steve, First bad commit (maybe != root cause): tree: git://git.samba.org/sfrench/cifs-2.6.git for-next head: c1abf13059571edd59d42d676ffe593fb987c019 commit: b4a8c8f8fa8b7b86bb62257fbb27e7bde58ac97e [3/4] cifs: rename fs/cifs directory to fs/smbfs_client config: ia64-defconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 11.2.0 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 git remote add cifs git://git.samba.org/sfrench/cifs-2.6.git git fetch --no-tags cifs for-next git checkout b4a8c8f8fa8b7b86bb62257fbb27e7bde58ac97e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): fs/smbfs_client/ioctl.c: In function 'cifs_ioctl': 324 | __u64 caps; | ^~~~ vim +/caps +324 fs/smbfs_client/ioctl.c 7ba3d1cdb7988ccf fs/cifs/ioctl.c Steve French 2021-05-02 312 f9ddcca4cf7d9523 fs/cifs/ioctl.c Steve French 2008-05-15 313 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) ^1da177e4c3f4152 fs/cifs/ioctl.c Linus Torvalds 2005-04-16 314 { 496ad9aa8ef44805 fs/cifs/ioctl.c Al Viro 2013-01-23 315 struct inode *inode = file_inode(filep); 7e7db86c7e1088e7 fs/cifs/ioctl.c Steve French 2019-09-19 316 struct smb3_key_debug_info pkey_inf; ^1da177e4c3f4152 fs/cifs/ioctl.c Linus Torvalds 2005-04-16 317 int rc = -ENOTTY; /* strange error - but the precedent */ 6d5786a34d98bffb fs/cifs/ioctl.c Pavel Shilovsky 2012-06-20 318 unsigned int xid; ba00ba64cf0895e4 fs/cifs/ioctl.c Jeff Layton 2010-09-20 319 struct cifsFileInfo *pSMBFile = filep->private_data; 96daf2b09178d8eb fs/cifs/ioctl.c Steve French 2011-05-27 320 struct cifs_tcon *tcon; a77592a70081edb5 fs/cifs/ioctl.c Ronnie Sahlberg 2020-07-09 321 struct tcon_link *tlink; d26c2ddd33569667 fs/cifs/ioctl.c Steve French 2020-02-06 322 struct cifs_sb_info *cifs_sb; f654bac2227adc5c fs/cifs/ioctl.c Steve French 2005-04-28 323 __u64 ExtAttrBits = 0; 618763958b2291a0 fs/cifs/ioctl.c Jeff Layton 2010-11-08 @324 __u64 caps; :::::: The code at line 324 was first introduced by commit :::::: 618763958b2291a09057dbfa553da6ded93dcfad cifs: make cifs_ioctl handle NULL filp->private_data correctly :::::: TO: Jeff Layton <jlayton(a)redhat.com&gt; :::::: CC: Steve French <sfrench(a)us.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org