tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.6.y-rt-rebase head: be0ee11d10b24b74d194786bbfc30c754157fbe8 commit: 9c16597e7598314ce4fb69cda60a7094e7d5655b [104/256] fs/dcache: use swait_queue instead of waitqueue config: nds32-defconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9c16597e7598314ce4fb69cda60a7094e7d5655b # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; Note: the linux-rt-devel/linux-5.6.y-rt-rebase HEAD be0ee11d10b24b74d194786bbfc30c754157fbe8 builds fine. It only hurts bisectibility. All error/warnings (new ones prefixed by >>): fs//proc/base.c: In function 'proc_fill_cache': 1985 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | DECLARE_WAIT_QUEUE_HEAD_ONSTACK 1985 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~ | rq fs//proc/base.c:1985:36: note: each undeclared identifier is reported only once for each function it appears in cc1: some warnings being treated as errors -- fs//proc/proc_sysctl.c: In function 'proc_sys_fill_cache': 705 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | DECLARE_WAIT_QUEUE_HEAD_ONSTACK 705 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~ | rq fs//proc/proc_sysctl.c:705:36: note: each undeclared identifier is reported only once for each function it appears in cc1: some warnings being treated as errors -- In file included from include/linux/nfs_fs.h:38, from fs//nfs/client.c:25: 1614 | struct swait_queue_head wq; | ^~ -- In file included from include/linux/nfs_fs.h:38, from fs//nfs/dir.c:31: 1614 | struct swait_queue_head wq; | ^~ fs//nfs/dir.c: In function 'nfs_prime_dcache': 464 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | DECLARE_WAIT_QUEUE_HEAD_ONSTACK 464 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~ | rq fs//nfs/dir.c:464:35: note: each undeclared identifier is reported only once for each function it appears in 465 | struct dentry *dentry; | ^~~~~~ fs//nfs/dir.c: In function 'nfs_atomic_open': fs//nfs/dir.c:1638:35: error: 'wq' undeclared (first use in this function); did you mean 'rq'? 1638 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~ | rq fs//nfs/dir.c:1639:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 1639 | struct nfs_open_context *ctx; | ^~~~~~ cc1: some warnings being treated as errors -- In file included from include/linux/nfs_fs.h:38, from fs//nfs/nfstrace.c:5: 1614 | struct swait_queue_head wq; | ^~ In file included from fs//nfs/nfstrace.h:1340, from fs//nfs/nfstrace.c:10: include/trace/define_trace.h:95:42: fatal error: ./nfstrace.h: No such file or directory 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | ^ compilation terminated. -- In file included from include/linux/nfs_fs.h:38, from fs//nfs/nfs4trace.c:5: 1614 | struct swait_queue_head wq; | ^~ In file included from fs//nfs/nfs4trace.h:2272, from fs//nfs/nfs4trace.c:13: include/trace/define_trace.h:95:42: fatal error: ./nfs4trace.h: No such file or directory 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | ^ compilation terminated. -- fs//fuse/readdir.c: In function 'fuse_direntplus_link': 161 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | DECLARE_WAIT_QUEUE_HEAD_ONSTACK 161 | DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq); | ^~ | rq fs//fuse/readdir.c:161:35: note: each undeclared identifier is reported only once for each function it appears in cc1: some warnings being treated as errors vim +1985 fs//proc/base.c 1960 1961 /* 1962 * Fill a directory entry. 1963 * 1964 * If possible create the dcache entry and derive our inode number and 1965 * file type from dcache entry. 1966 * 1967 * Since all of the proc inode numbers are dynamically generated, the inode 1968 * numbers do not exist until the inode is cache. This means creating the 1969 * the dcache entry in readdir is necessary to keep the inode numbers 1970 * reported by readdir in sync with the inode numbers reported 1971 * by stat. 1972 */ 1973 bool proc_fill_cache(struct file *file, struct dir_context *ctx, 1974 const char *name, unsigned int len, 1975 instantiate_t instantiate, struct task_struct *task, const void *ptr) 1976 { 1977 struct dentry *child, *dir = file->f_path.dentry; 1978 struct qstr qname = QSTR_INIT(name, len); 1979 struct inode *inode; 1980 unsigned type = DT_UNKNOWN; 1981 ino_t ino = 1; 1982 1983 child = d_hash_and_lookup(dir, &qname); 1984 if (!child) { 1986 child = d_alloc_parallel(dir, &qname, &wq); 1987 if (IS_ERR(child)) 1988 goto end_instantiate; 1989 if (d_in_lookup(child)) { 1990 struct dentry *res; 1991 res = instantiate(child, task, ptr); 1992 d_lookup_done(child); 1993 if (unlikely(res)) { 1994 dput(child); 1995 child = res; 1996 if (IS_ERR(child)) 1997 goto end_instantiate; 1998 } 1999 } 2000 } 2001 inode = d_inode(child); 2002 ino = inode->i_ino; 2003 type = inode->i_mode >> 12; 2004 dput(child); 2005 end_instantiate: 2006 return dir_emit(ctx, name, len, ino, type); 2007 } 2008 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org