Hi "Björn,

I love your patch! Yet something to improve:

[auto build test ERROR on 95204c9bfa48d2f4d3bab7df55c1cc823957ff81]

url:    
https://github.com/0day-ci/linux/commits/Bj-rn-T-pel/Introduce-bpf_redirect_xsk-helper/20210120-150357
base:    95204c9bfa48d2f4d3bab7df55c1cc823957ff81
config: arm-randconfig-r013-20210120 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 
22b68440e1647e16b5ee24b924986207173c02d1)
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://github.com/0day-ci/linux/commit/419b1341d7980ee57fb10f4306719eef3c1a15f8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Bj-rn-T-pel/Introduce-bpf_redirect_xsk-helper/20210120-150357
        git checkout 419b1341d7980ee57fb10f4306719eef3c1a15f8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:49:33: note: expanded from macro 'READ_ONCE'
           compiletime_assert_rwonce_type(x);                              \
                                          ^
   include/asm-generic/rwonce.h:36:35: note: expanded from macro 
'compiletime_assert_rwonce_type'
           compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long 
long),  \
                                            ^
   include/linux/compiler_types.h:282:10: note: expanded from macro 
'__native_word'
           (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
                   ^
   include/linux/compiler_types.h:320:22: note: expanded from macro 
'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro 
'_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro 
'__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:49:33: note: expanded from macro 'READ_ONCE'
           compiletime_assert_rwonce_type(x);                              \
                                          ^
   include/asm-generic/rwonce.h:36:35: note: expanded from macro 
'compiletime_assert_rwonce_type'
           compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long 
long),  \
                                            ^
   include/linux/compiler_types.h:282:39: note: expanded from macro 
'__native_word'
           (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
                                                ^
   include/linux/compiler_types.h:320:22: note: expanded from macro 
'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro 
'_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro 
'__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:49:33: note: expanded from macro 'READ_ONCE'
           compiletime_assert_rwonce_type(x);                              \
                                          ^
   include/asm-generic/rwonce.h:36:35: note: expanded from macro 
'compiletime_assert_rwonce_type'
           compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long 
long),  \
                                            ^
   include/linux/compiler_types.h:283:10: note: expanded from macro 
'__native_word'
            sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
                   ^
   include/linux/compiler_types.h:320:22: note: expanded from macro 
'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro 
'_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro 
'__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:49:33: note: expanded from macro 'READ_ONCE'
           compiletime_assert_rwonce_type(x);                              \
                                          ^
   include/asm-generic/rwonce.h:36:35: note: expanded from macro 
'compiletime_assert_rwonce_type'
           compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long 
long),  \
                                            ^
   include/linux/compiler_types.h:283:38: note: expanded from macro 
'__native_word'
            sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
                                               ^
   include/linux/compiler_types.h:320:22: note: expanded from macro 
'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro 
'_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro 
'__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:49:33: note: expanded from macro 'READ_ONCE'
           compiletime_assert_rwonce_type(x);                              \
                                          ^
   include/asm-generic/rwonce.h:36:48: note: expanded from macro 
'compiletime_assert_rwonce_type'
           compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long 
long),  \
                                                         ^
   include/linux/compiler_types.h:320:22: note: expanded from macro 
'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro 
'_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro 
'__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:50:14: note: expanded from macro 'READ_ONCE'
           __READ_ONCE(x);                                                 \
                       ^
   include/asm-generic/rwonce.h:44:65: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                                                    ^
   include/linux/compiler_types.h:271:13: note: expanded from macro 
'__unqual_scalar_typeof'
                   _Generic((x),                                           \
                             ^
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:50:14: note: expanded from macro 'READ_ONCE'
           __READ_ONCE(x);                                                 \
                       ^
   include/asm-generic/rwonce.h:44:65: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                                                    ^
   include/linux/compiler_types.h:278:15: note: expanded from macro 
'__unqual_scalar_typeof'
                            default: (x)))
                                      ^
>> net/core/filter.c:4165:36: error: no member named 'xsk' in 'struct 
>> netdev_rx_queue'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
                          ~~~~~~~~~~~~~~~~~~ ^
   include/asm-generic/rwonce.h:50:14: note: expanded from macro 'READ_ONCE'
           __READ_ONCE(x);                                                 \
                       ^
   include/asm-generic/rwonce.h:44:72: note: expanded from macro '__READ_ONCE'
   #define __READ_ONCE(x)  (*(const volatile __unqual_scalar_typeof(x) *)&(x))
                                                                           ^
>> net/core/filter.c:4165:5: error: assigning to 'struct xdp_sock *' from 
>> incompatible type 'void'
           xs = READ_ONCE(dev->_rx[queue_id].xsk);
              ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9 errors generated.


vim +4165 net/core/filter.c

  4157  
  4158  BPF_CALL_2(bpf_xdp_redirect_xsk, struct xdp_buff *, xdp, u64, action)
  4159  {
  4160          struct net_device *dev = xdp->rxq->dev;
  4161          u32 queue_id = xdp->rxq->queue_index;
  4162          struct bpf_redirect_info *ri;
  4163          struct xdp_sock *xs;
  4164  
> 4165          xs = READ_ONCE(dev->_rx[queue_id].xsk);
  4166          if (!xs)
  4167                  return action;
  4168  
  4169          ri = this_cpu_ptr(&bpf_redirect_info);
  4170          ri->tgt_type = XDP_REDIR_XSK;
  4171          ri->tgt_value = xs;
  4172  
  4173          return XDP_REDIRECT;
  4174  }
  4175  

---
0-DAY CI Kernel Test Service, Intel Corporation
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