Hi Helge, kernel test robot noticed the following build errors: [auto build test ERROR on linus/master] [also build test ERROR on v6.5-rc7 next-20230821] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Helge-Deller/procfs-Fix-proc-self-maps-output-for-32-bit-kernel-and-compat-tasks/20230821-100823 base: linus/master patch link: https://lore.kernel.org/r/ZOCJltW%2FeufPUc%2BT%40p100 patch subject: [PATCH] procfs: Fix /proc/self/maps output for 32-bit kernel and compat tasks config: x86_64-buildonly-randconfig-006-20230822 (https://download.01.org/0day-ci/archive/20230822/202308220747.XMKc32Kz-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230822/202308220747.XMKc32Kz-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308220747.XMKc32Kz-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): fs/seq_file.c: In function 'seq_put_hex_ll': >> fs/seq_file.c:765:23: error: implicit declaration of function 'is_compat_task' [-Werror=implicit-function-declaration] 765 | if (v == 0 || is_compat_task()) | ^~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/is_compat_task +765 fs/seq_file.c 737 738 /** 739 * seq_put_hex_ll - put a number in hexadecimal notation 740 * @m: seq_file identifying the buffer to which data should be written 741 * @delimiter: a string which is printed before the number 742 * @v: the number 743 * @width: a minimum field width 744 * 745 * seq_put_hex_ll(m, "", v, 8) is equal to seq_printf(m, "%08llx", v) 746 * 747 * This routine is very quick when you show lots of numbers. 748 * In usual cases, it will be better to use seq_printf(). It's easier to read. 749 */ 750 void seq_put_hex_ll(struct seq_file *m, const char *delimiter, 751 unsigned long long v, unsigned int width) 752 { 753 unsigned int len; 754 int i; 755 756 if (delimiter && delimiter[0]) { 757 if (delimiter[1] == 0) 758 seq_putc(m, delimiter[0]); 759 else 760 seq_puts(m, delimiter); 761 } 762 763 #ifdef CONFIG_64BIT 764 /* If x is 0, the result of __builtin_clzll is undefined */ > 765 if (v == 0 || is_compat_task()) 766 len = 1; 767 else 768 len = (sizeof(v) * 8 - __builtin_clzll(v) + 3) / 4; 769 #else 770 /* On 32-bit kernel always use provided width */ 771 len = 1; 772 #endif 773 774 if (len < width) 775 len = width; 776 777 if (m->count + len > m->size) { 778 seq_set_overflow(m); 779 return; 780 } 781 782 for (i = len - 1; i >= 0; i--) { 783 m->buf[m->count + i] = hex_asc[0xf & v]; 784 v = v >> 4; 785 } 786 m->count += len; 787 } 788 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
