tree: https://github.com/zen-kernel/zen-kernel 5.13/futex2 head: db649ce1f5de12432be5bfedd8388eacc2f85efc commit: 28d2f243eaf76b0e9d84947a899fc742bd49d70c [3/19] futex2: Implement vectorized wait config: sparc64-randconfig-r034-20210718 (attached as .config) compiler: sparc64-linux-gcc (GCC) 10.3.0 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 # https://github.com/zen-kernel/zen-kernel/commit/28d2f243eaf76b0e9d84947a8... git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen-kernel-zen-kernel 5.13/futex2 git checkout 28d2f243eaf76b0e9d84947a899fc742bd49d70c # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=sparc64 SHELL=/bin/bash 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 >>): kernel/futex2.c: In function 'futex_get_shared_key': kernel/futex2.c:307:31: error: implicit declaration of function 'basepage_index'; did you mean 'page_index'? [-Werror=implicit-function-declaration] 307 | key->index = (unsigned long)basepage_index(tail); | ^~~~~~~~~~~~~~ | page_index kernel/futex2.c: At top level: kernel/futex2.c:683:42: error: expected ')' before 'void' 683 | COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, | ^~~~~ | ) kernel/futex2.c:720:16: warning: 'struct compat_futex_waitv' declared inside parameter list will not be visible outside of this definition or declaration 720 | struct compat_futex_waitv __user *uwaitv, | ^~~~~~~~~~~~~~~~~~ kernel/futex2.c: In function 'compat_futex_parse_waitv': kernel/futex2.c:723:28: error: storage size of 'waitv' isn't known 723 | struct compat_futex_waitv waitv; | ^~~~~ In file included from arch/sparc/include/asm/percpu_64.h:5, from arch/sparc/include/asm/percpu.h:5, from include/linux/irqflags.h:17, from include/asm-generic/cmpxchg-local.h:6, from arch/sparc/include/asm/cmpxchg_64.h:111, from arch/sparc/include/asm/cmpxchg.h:5, from arch/sparc/include/asm/atomic_64.h:12, from arch/sparc/include/asm/atomic.h:5, from include/linux/atomic.h:7, from include/linux/debug_locks.h:5, from include/linux/freezer.h:7, from kernel/futex2.c:16: 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ kernel/futex2.c:728:3: note: in expansion of macro 'if' 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^~ 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ kernel/futex2.c:728:3: note: in expansion of macro 'if' 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^~ 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' 69 | (cond) ? \ | ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' 56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ^~~~~~~~~~~~~~ kernel/futex2.c:728:3: note: in expansion of macro 'if' 728 | if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) | ^~ 737 | futexv->objects[i].uaddr = compat_ptr(waitv.uaddr); | ^~~~~~~~~~ kernel/futex2.c:723:28: warning: unused variable 'waitv' [-Wunused-variable] 723 | struct compat_futex_waitv waitv; | ^~~~~ kernel/futex2.c: At top level: 756 | COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters, | ^~~~~~~ | ) kernel/futex2.c:719:12: warning: 'compat_futex_parse_waitv' defined but not used [-Wunused-function] 719 | static int compat_futex_parse_waitv(struct futex_waiter_head *futexv, | ^~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +728 kernel/futex2.c 709 710 #ifdef CONFIG_COMPAT 711 /** 712 * compat_futex_parse_waitv - Parse a waitv array from userspace 713 * @futexv: Kernel side list of waiters to be filled 714 * @uwaitv: Userspace list to be parsed 715 * @nr_futexes: Length of futexv 716 * 717 * Return: Error code on failure, pointer to a prepared futexv otherwise 718 */ 719 static int compat_futex_parse_waitv(struct futex_waiter_head *futexv, 720 struct compat_futex_waitv __user *uwaitv, 721 unsigned int nr_futexes) 722 { 723 struct compat_futex_waitv waitv; 724 struct futex_bucket *bucket; 725 unsigned int i; 726 727 for (i = 0; i < nr_futexes; i++) { 729 return -EFAULT; 730 731 if ((waitv.flags & ~FUTEXV_WAITER_MASK) || 732 (waitv.flags & FUTEX_SIZE_MASK) != FUTEX_32) 733 return -EINVAL; 734 735 futexv->objects[i].key.pointer = 0; 736 futexv->objects[i].flags = waitv.flags; 738 futexv->objects[i].val = waitv.val; 739 futexv->objects[i].index = i; 740 741 bucket = futex_get_bucket(compat_ptr(waitv.uaddr), 742 &futexv->objects[i].key, 743 is_object_shared); 744 745 if (IS_ERR(bucket)) 746 return PTR_ERR(bucket); 747 748 futexv->objects[i].bucket = bucket; 749 750 INIT_LIST_HEAD(&futexv->objects[i].list); 751 } 752 753 return 0; 754 } 755 757 unsigned int, nr_futexes, unsigned int, flags, 758 struct __kernel_timespec __user *, timo) 759 { 760 struct futex_waiter_head *futexv; 761 int ret; 762 763 if (flags & ~FUTEXV_MASK) 764 return -EINVAL; 765 766 if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters) 767 return -EINVAL; 768 769 futexv = kmalloc((sizeof(struct futex_waiter) * nr_futexes) + 770 sizeof(*futexv), GFP_KERNEL); 771 if (!futexv) 772 return -ENOMEM; 773 774 futexv->hint = false; 775 futexv->task = current; 776 777 ret = compat_futex_parse_waitv(futexv, waiters, nr_futexes); 778 779 if (!ret) 780 ret = __futex_waitv(futexv, nr_futexes, timo, flags); 781 782 kfree(futexv); 783 784 return ret; 785 } 786 #endif 787 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org