tree: https://github.com/zen-kernel/zen-kernel 5.13/futex2 head: db649ce1f5de12432be5bfedd8388eacc2f85efc commit: 28d2f243eaf76b0e9d84947a899fc742bd49d70c [3/19] futex2: Implement vectorized wait config: powerpc64-randconfig-r011-20210718 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 5d5b08761f944d5b9822d582378333cc4b36a0a7) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # 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=clang make.cross O=build_dir ARCH=powerpc 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 >>): In file included from kernel/futex2.c:16: In file included from include/linux/freezer.h:7: In file included from include/linux/debug_locks.h:5: In file included from include/linux/atomic.h:7: In file included from arch/powerpc/include/asm/atomic.h:11: In file included from arch/powerpc/include/asm/cmpxchg.h:8: In file included from include/linux/bug.h:5: In file included from arch/powerpc/include/asm/bug.h:109: In file included from include/asm-generic/bug.h:20: In file included from include/linux/kernel.h:12: In file included from include/linux/bitops.h:32: In file included from arch/powerpc/include/asm/bitops.h:62: arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") ^ <built-in>:309:9: note: previous definition is here #define __lwsync __builtin_ppc_lwsync ^ kernel/futex2.c:307:31: error: implicit declaration of function 'basepage_index' [-Werror,-Wimplicit-function-declaration] key->index = (unsigned long)basepage_index(tail); ^ kernel/futex2.c:307:31: note: did you mean 'page_index'? include/linux/mm.h:1653:23: note: 'page_index' declared here static inline pgoff_t page_index(struct page *page) ^ kernel/futex2.c:683:43: error: expected identifier COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, ^ kernel/futex2.c:687:25: error: use of undeclared identifier 'uaddr' return ksys_futex_wait(uaddr, val, flags, timo); ^ kernel/futex2.c:687:32: error: use of undeclared identifier 'val' return ksys_futex_wait(uaddr, val, flags, timo); ^ kernel/futex2.c:687:37: error: use of undeclared identifier 'flags' return ksys_futex_wait(uaddr, val, flags, timo); ^ kernel/futex2.c:687:44: error: use of undeclared identifier 'timo' return ksys_futex_wait(uaddr, val, flags, timo); ^ kernel/futex2.c:683:1: warning: no previous prototype for function 'COMPAT_SYSCALL_DEFINE4' [-Wmissing-prototypes] COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, ^ kernel/futex2.c:683:1: note: declare 'static' if the function is not intended to be used outside of this translation unit COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, ^ static kernel/futex2.c:683:23: error: this old-style function definition is not preceded by a prototype [-Werror,-Wstrict-prototypes] COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, ^ kernel/futex2.c:720:16: warning: declaration of 'struct compat_futex_waitv' will not be visible outside of this function [-Wvisibility] struct compat_futex_waitv __user *uwaitv, ^ kernel/futex2.c:723:28: error: variable has incomplete type 'struct compat_futex_waitv' struct compat_futex_waitv waitv; ^ kernel/futex2.c:720:16: note: forward declaration of 'struct compat_futex_waitv' struct compat_futex_waitv __user *uwaitv, ^ kernel/futex2.c:728:37: error: subscript of pointer to incomplete type 'struct compat_futex_waitv' if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv))) ~~~~~~^ kernel/futex2.c:720:16: note: forward declaration of 'struct compat_futex_waitv' struct compat_futex_waitv __user *uwaitv, ^ kernel/futex2.c:737:31: error: implicit declaration of function 'compat_ptr' [-Werror,-Wimplicit-function-declaration] futexv->objects[i].uaddr = compat_ptr(waitv.uaddr); ^ kernel/futex2.c:756:37: error: expected identifier COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters, ^ COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters, ^ kernel/futex2.c:683:1: note: previous definition is here COMPAT_SYSCALL_DEFINE4(compat_futex_wait, void __user *, uaddr, compat_u64, val, ^ kernel/futex2.c:763:6: error: use of undeclared identifier 'flags' if (flags & ~FUTEXV_MASK) ^ kernel/futex2.c:766:7: error: use of undeclared identifier 'nr_futexes' if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters) ^ kernel/futex2.c:766:21: error: use of undeclared identifier 'nr_futexes' if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters) ^ kernel/futex2.c:766:54: error: use of undeclared identifier 'waiters' if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters) ^ kernel/futex2.c:769:50: error: use of undeclared identifier 'nr_futexes' futexv = kmalloc((sizeof(struct futex_waiter) * nr_futexes) + ^ kernel/futex2.c:777:41: error: use of undeclared identifier 'waiters' ret = compat_futex_parse_waitv(futexv, waiters, nr_futexes); ^ kernel/futex2.c:777:50: error: use of undeclared identifier 'nr_futexes' ret = compat_futex_parse_waitv(futexv, waiters, nr_futexes); ^ fatal error: too many errors emitted, stopping now [-ferror-limit=] 3 warnings and 20 errors generated. vim +/COMPAT_SYSCALL_DEFINE4 +756 kernel/futex2.c 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