Hi Bixuan, Thank you for the patch! Yet something to improve: [auto build test ERROR on sparc-next/master] [also build test ERROR on net-next/master net/master linus/master v5.8-rc5 next-20200716] [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] url: https://github.com/0day-ci/linux/commits/Bixuan-Cui/net-neterion-vxge-red... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git master config: arc-allyesconfig (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): drivers/net/ethernet/neterion/vxge/vxge-main.c: In function 'VXGE_COMPLETE_VPATH_TX': 103 | struct sk_buff **completed; | ^~~~~~~~~ drivers/net/ethernet/neterion/vxge/vxge-main.c:102:18: note: previous declaration of 'completed' was here 102 | struct sk_buff *completed[NR_SKB_COMPLETED]; | ^~~~~~~~~ 126 | free(completed); | ^~~~ drivers/net/ethernet/neterion/vxge/vxge-main.c:60:1: note: 'free' is defined in header '<stdlib.h>'; did you forget to '#include <stdlib.h>'? 59 | #include "vxge-main.h" +++ |+#include <stdlib.h> 60 | #include "vxge-reg.h" cc1: some warnings being treated as errors vim +/completed +103 drivers/net/ethernet/neterion/vxge/vxge-main.c 96 97 static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo) 98 { 99 struct sk_buff **skb_ptr = NULL; 100 struct sk_buff **temp; 101 #define NR_SKB_COMPLETED 128 102 struct sk_buff *completed[NR_SKB_COMPLETED]; 104 int more; 105 106 completed = kcalloc(NR_SKB_COMPLETED, sizeof(*completed), 107 GFP_KERNEL); 108 if (!completed) 109 return; 110 111 do { 112 more = 0; 113 skb_ptr = completed; 114 115 if (__netif_tx_trylock(fifo->txq)) { 116 vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr, 117 NR_SKB_COMPLETED, &more); 118 __netif_tx_unlock(fifo->txq); 119 } 120 121 /* free SKBs */ 122 for (temp = completed; temp != skb_ptr; temp++) 123 dev_consume_skb_irq(*temp); 124 } while (more); 125 127 } 128 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org