tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wip-freezer head: 9ddb4cc740408e85babad7482f50e1b4d2490759 commit: 6b4cee97b0cda639bfd51c2ad7d6b1f6fe617013 [2/3] freezer,umh: Clean up freezer/initrd interaction config: x86_64-randconfig-a001-20210614 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue sched/wip-freezer git checkout 6b4cee97b0cda639bfd51c2ad7d6b1f6fe617013 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): call_usermodehelper_exec(info, UMH_WAIT_PROC|UMH_WAIT_FREEZABLE); ^ 1 error generated. vim +/UMH_WAIT_FREEZABLE +86 init/do_mounts_initrd.c 65 66 static void __init handle_initrd(void) 67 { 68 struct subprocess_info *info; 69 static char *argv[] = { "linuxrc", NULL, }; 70 extern char *envp_init[]; 71 int error; 72 73 pr_warn("using deprecated initrd support, will be removed in 2021.\n"); 74 75 real_root_dev = new_encode_dev(ROOT_DEV); 76 create_dev("/dev/root.old", Root_RAM0); 77 /* mount initrd on rootfs' /root */ 78 mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY); 79 init_mkdir("/old", 0700); 80 init_chdir("/old"); 81 82 info = call_usermodehelper_setup("/linuxrc", argv, envp_init, 83 GFP_KERNEL, init_linuxrc, NULL, NULL); 84 if (!info) 85 return; 87 88 /* move initrd to rootfs' /old */ 89 init_mount("..", ".", NULL, MS_MOVE, NULL); 90 /* switch root and cwd back to / of rootfs */ 91 init_chroot(".."); 92 93 if (new_decode_dev(real_root_dev) == Root_RAM0) { 94 init_chdir("/old"); 95 return; 96 } 97 98 init_chdir("/"); 99 ROOT_DEV = new_decode_dev(real_root_dev); 100 mount_root(); 101 102 printk(KERN_NOTICE "Trying to move old root to /initrd ... "); 103 error = init_mount("/old", "/root/initrd", NULL, MS_MOVE, NULL); 104 if (!error) 105 printk("okay\n"); 106 else { 107 if (error == -ENOENT) 108 printk("/initrd does not exist. Ignored.\n"); 109 else 110 printk("failed\n"); 111 printk(KERN_NOTICE "Unmounting old root\n"); 112 init_umount("/old", MNT_DETACH); 113 } 114 } 115 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org