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* [zen-kernel-zen-kernel:5.12/futex2 4/14] kernel/futex2.c:1077:30: error: variable has incomplete type 'struct compat_futex_requeue'
@ 2021-05-05  1:08 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-05-05  1:08 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://github.com/zen-kernel/zen-kernel 5.12/futex2
head:   5932045f3f84865548199be0695192a500fbb5cb
commit: 270e16f72b29d04a83645b653e9fc65be51801d2 [4/14] futex2: Implement requeue operation
config: powerpc64-randconfig-r025-20210503 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
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/270e16f72b29d04a83645b653e9fc65be51801d2
        git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen-kernel-zen-kernel 5.12/futex2
        git checkout 270e16f72b29d04a83645b653e9fc65be51801d2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   kernel/futex2.c:711:16: 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:714:28: error: variable has incomplete type 'struct compat_futex_waitv'
           struct compat_futex_waitv waitv;
                                     ^
   kernel/futex2.c:711:16: note: forward declaration of 'struct compat_futex_waitv'
                                       struct compat_futex_waitv __user *uwaitv,
                                              ^
   kernel/futex2.c:719:37: error: subscript of pointer to incomplete type 'struct compat_futex_waitv'
                   if (copy_from_user(&waitv, &uwaitv[i], sizeof(waitv)))
                                               ~~~~~~^
   kernel/futex2.c:711:16: note: forward declaration of 'struct compat_futex_waitv'
                                       struct compat_futex_waitv __user *uwaitv,
                                              ^
   kernel/futex2.c:728:31: error: implicit declaration of function 'compat_ptr' [-Werror,-Wimplicit-function-declaration]
                   futexv->objects[i].uaddr  = compat_ptr(waitv.uaddr);
                                               ^
   kernel/futex2.c:747:37: error: expected identifier
   COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters,
                                       ^
   kernel/futex2.c:754:6: error: use of undeclared identifier 'flags'
           if (flags & ~FUTEXV_MASK)
               ^
   kernel/futex2.c:757:7: error: use of undeclared identifier 'nr_futexes'
           if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters)
                ^
   kernel/futex2.c:757:21: error: use of undeclared identifier 'nr_futexes'
           if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters)
                              ^
   kernel/futex2.c:757:54: error: use of undeclared identifier 'waiters'
           if (!nr_futexes || nr_futexes > FUTEX_WAITV_MAX || !waiters)
                                                               ^
   kernel/futex2.c:760:50: error: use of undeclared identifier 'nr_futexes'
           futexv = kmalloc((sizeof(struct futex_waiter) * nr_futexes) +
                                                           ^
   kernel/futex2.c:768:41: error: use of undeclared identifier 'waiters'
           ret = compat_futex_parse_waitv(futexv, waiters, nr_futexes);
                                                  ^
   kernel/futex2.c:768:50: error: use of undeclared identifier 'nr_futexes'
           ret = compat_futex_parse_waitv(futexv, waiters, nr_futexes);
                                                           ^
   kernel/futex2.c:771:31: error: use of undeclared identifier 'nr_futexes'
                   ret = __futex_waitv(futexv, nr_futexes, timo, flags);
                                               ^
   kernel/futex2.c:771:43: error: use of undeclared identifier 'timo'
                   ret = __futex_waitv(futexv, nr_futexes, timo, flags);
                                                           ^
   kernel/futex2.c:771:49: error: use of undeclared identifier 'flags'
                   ret = __futex_waitv(futexv, nr_futexes, timo, flags);
                                                                 ^
   kernel/futex2.c:747:1: warning: no previous prototype for function 'COMPAT_SYSCALL_DEFINE4' [-Wmissing-prototypes]
   COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters,
   ^
   kernel/futex2.c:747:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters,
   ^
   static 
   kernel/futex2.c:747:23: error: this old-style function definition is not preceded by a prototype [-Werror,-Wstrict-prototypes]
   COMPAT_SYSCALL_DEFINE4(futex_waitv, struct compat_futex_waitv __user *, waiters,
                         ^
>> kernel/futex2.c:1074:18: warning: declaration of 'struct compat_futex_requeue' will not be visible outside of this function [-Wvisibility]
                                         struct compat_futex_requeue __user *uaddr,
                                                ^
>> kernel/futex2.c:1077:30: error: variable has incomplete type 'struct compat_futex_requeue'
           struct compat_futex_requeue tmp;
                                       ^
   kernel/futex2.c:1074:18: note: forward declaration of 'struct compat_futex_requeue'
                                         struct compat_futex_requeue __user *uaddr,
                                                ^
   kernel/futex2.c:1088:14: error: implicit declaration of function 'compat_ptr' [-Werror,-Wimplicit-function-declaration]
           rq->uaddr = compat_ptr(tmp.uaddr);
                       ^
   kernel/futex2.c:1094:39: error: expected identifier
   COMPAT_SYSCALL_DEFINE6(futex_requeue, struct compat_futex_requeue __user *, uaddr1,
                                         ^
   kernel/futex2.c:1103:6: error: use of undeclared identifier 'flags'
           if (flags)
               ^
   fatal error: too many errors emitted, stopping now [-ferror-limit=]
   3 warnings and 20 errors generated.


vim +1077 kernel/futex2.c

  1071	
  1072	#ifdef CONFIG_COMPAT
  1073	static int compat_futex_parse_requeue(struct futex_requeue *rq,
> 1074					      struct compat_futex_requeue __user *uaddr,
  1075					      bool *shared)
  1076	{
> 1077		struct compat_futex_requeue tmp;
  1078	
  1079		if (copy_from_user(&tmp, uaddr, sizeof(tmp)))
  1080			return -EFAULT;
  1081	
  1082		if (tmp.flags & ~FUTEXV_WAITER_MASK ||
  1083		    (tmp.flags & FUTEX_SIZE_MASK) != FUTEX_32)
  1084			return -EINVAL;
  1085	
  1086		*shared = (tmp.flags & FUTEX_SHARED_FLAG) ? true : false;
  1087	
  1088		rq->uaddr = compat_ptr(tmp.uaddr);
  1089		rq->flags = tmp.flags;
  1090	
  1091		return 0;
  1092	}
  1093	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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2021-05-05  1:08 [zen-kernel-zen-kernel:5.12/futex2 4/14] kernel/futex2.c:1077:30: error: variable has incomplete type 'struct compat_futex_requeue' kernel test robot

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