tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git ux500-href-dts-fixups head: be31b268b8f93e8498b83222d469f54877f60bb8 commit: be31b268b8f93e8498b83222d469f54877f60bb8 [5/5] hacks config: arm-randconfig-r002-20210510 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 492173d42b32cb91d5d0d72d5ed84fcab80d059a) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git/... git remote add nomadik https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git git fetch --no-tags nomadik ux500-href-dts-fixups git checkout be31b268b8f93e8498b83222d469f54877f60bb8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 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 >>): char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size); ^ 1 warning generated. vim +684 init/initramfs.c 7c184ecd262fe64 Christoph Hellwig 2019-05-13 676 e7cb072eb988e46 Rasmus Villemoes 2021-05-06 677 static void __init do_populate_rootfs(void *unused, async_cookie_t cookie) ^1da177e4c3f415 Linus Torvalds 2005-04-16 678 { be31b268b8f93e8 Linus Walleij 2021-04-16 679 pr_info("%s enter __initramfs_start = %08x, __initramfs_size = %08x\n", be31b268b8f93e8 Linus Walleij 2021-04-16 680 __func__, be31b268b8f93e8 Linus Walleij 2021-04-16 681 (unsigned int)__initramfs_start, be31b268b8f93e8 Linus Walleij 2021-04-16 682 (unsigned int)__initramfs_size); 17a9be317475351 Stafford Horne 2017-05-04 683 /* Load the built in initramfs */ ffe8018c3424892 Hendrik Brueckner 2010-09-17 @684 char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size); ^1da177e4c3f415 Linus Torvalds 2005-04-16 685 if (err) dd23e8098f33a55 Florian Fainelli 2021-02-25 686 panic_show_mem("%s", err); /* Failed to decompress INTERNAL initramfs */ afef7889c480ed1 Christoph Hellwig 2019-05-13 687 be31b268b8f93e8 Linus Walleij 2021-04-16 688 if (!initrd_start) be31b268b8f93e8 Linus Walleij 2021-04-16 689 pr_info("no initrd_start\n"); afef7889c480ed1 Christoph Hellwig 2019-05-13 690 if (!initrd_start || IS_ENABLED(CONFIG_INITRAMFS_FORCE)) bb813f4c933ae9f Tejun Heo 2013-01-18 691 goto done; 54c7a8916a887f3 Christoph Hellwig 2019-05-13 692 afef7889c480ed1 Christoph Hellwig 2019-05-13 693 if (IS_ENABLED(CONFIG_BLK_DEV_RAM)) afef7889c480ed1 Christoph Hellwig 2019-05-13 694 printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n"); afef7889c480ed1 Christoph Hellwig 2019-05-13 695 else afef7889c480ed1 Christoph Hellwig 2019-05-13 696 printk(KERN_INFO "Unpacking initramfs...\n"); afef7889c480ed1 Christoph Hellwig 2019-05-13 697 afef7889c480ed1 Christoph Hellwig 2019-05-13 698 err = unpack_to_rootfs((char *)initrd_start, initrd_end - initrd_start); afef7889c480ed1 Christoph Hellwig 2019-05-13 699 if (err) { 9ab6b718491b1a3 Christoph Hellwig 2020-06-06 700 #ifdef CONFIG_BLK_DEV_RAM 7c184ecd262fe64 Christoph Hellwig 2019-05-13 701 populate_initrd_image(err); 9ab6b718491b1a3 Christoph Hellwig 2020-06-06 702 #else 9ab6b718491b1a3 Christoph Hellwig 2020-06-06 703 printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); 9ab6b718491b1a3 Christoph Hellwig 2020-06-06 704 #endif 17a9be317475351 Stafford Horne 2017-05-04 705 } 23091e287355440 Christoph Hellwig 2019-05-13 706 afef7889c480ed1 Christoph Hellwig 2019-05-13 707 done: 23091e287355440 Christoph Hellwig 2019-05-13 708 /* 23091e287355440 Christoph Hellwig 2019-05-13 709 * If the initrd region is overlapped with crashkernel reserved region, 23091e287355440 Christoph Hellwig 2019-05-13 710 * free only memory that is not part of crashkernel region. 23091e287355440 Christoph Hellwig 2019-05-13 711 */ 5d59aa8f9ce972b Steven Price 2019-05-17 712 if (!do_retain_initrd && initrd_start && !kexec_free_initrd()) 23091e287355440 Christoph Hellwig 2019-05-13 713 free_initrd_mem(initrd_start, initrd_end); 23091e287355440 Christoph Hellwig 2019-05-13 714 initrd_start = 0; 23091e287355440 Christoph Hellwig 2019-05-13 715 initrd_end = 0; 23091e287355440 Christoph Hellwig 2019-05-13 716 08865514805d2de Lokesh Vutla 2017-02-27 717 flush_delayed_fput(); e7cb072eb988e46 Rasmus Villemoes 2021-05-06 718 } e7cb072eb988e46 Rasmus Villemoes 2021-05-06 719 :::::: The code at line 684 was first introduced by commit :::::: ffe8018c3424892c9590048fc36caa6c3e0c8a76 initramfs: fix initramfs size calculation :::::: TO: Hendrik Brueckner <brueckner(a)linux.vnet.ibm.com&gt; :::::: CC: Michal Marek <mmarek(a)suse.cz&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org