[Intel-wired-lan] [jkirsher-next-queue:dev-queue 7/115] drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8157:14: warning: division by zero is undefined
kbuild test robot
lkp at intel.com
Sat May 16 05:14:38 UTC 2020
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git dev-queue
head: 1ae51690bc317eb011c6fcc8f5549b151b347167
commit: cc703d543a3b97138318bfe7d3c86cbf78136395 [7/115] ixgbe: fix XDP redirect on archs with PAGE_SIZE above 4K
config: arm64-randconfig-r025-20200515 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project b31cb3aa5ee7ea92d830b06a0a7e42c7f2791dd4)
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
git checkout cc703d543a3b97138318bfe7d3c86cbf78136395
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp at intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:2271:15: error: redefinition of 'truesize'
unsigned int truesize = ring_uses_build_skb(rx_ring) ?
^
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:2267:15: note: previous definition is here
unsigned int truesize = ixgbe_rx_frame_truesize(rx_ring, size);
^
>> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8157:14: warning: division by zero is undefined [-Wdivision-by-zero]
cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8161:14: warning: division by zero is undefined [-Wdivision-by-zero]
cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8165:14: warning: division by zero is undefined [-Wdivision-by-zero]
cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8169:14: warning: division by zero is undefined [-Wdivision-by-zero]
cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8180:19: warning: division by zero is undefined [-Wdivision-by-zero]
olinfo_status |= IXGBE_SET_FLAG(tx_flags,
^~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8185:19: warning: division by zero is undefined [-Wdivision-by-zero]
olinfo_status |= IXGBE_SET_FLAG(tx_flags,
^~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8190:19: warning: division by zero is undefined [-Wdivision-by-zero]
olinfo_status |= IXGBE_SET_FLAG(tx_flags,
^~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8198:19: warning: division by zero is undefined [-Wdivision-by-zero]
olinfo_status |= IXGBE_SET_FLAG(tx_flags,
^~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8147:26: note: expanded from macro 'IXGBE_SET_FLAG'
((u32)(_input & _flag) / (_flag / _result)))
^ ~~~~~~~~~~~~~~~~~
>> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:10796:45: warning: shift count >= width of type [-Wshift-count-overflow]
if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:139:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
9 warnings and 1 error generated.
vim +8157 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
9a799d71034c4e2 drivers/net/ixgbe/ixgbe_main.c Auke Kok 2007-09-15 8143
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8144 #define IXGBE_SET_FLAG(_input, _flag, _result) \
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8145 ((_flag <= _result) ? \
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8146 ((u32)(_input & _flag) * (_result / _flag)) : \
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8147 ((u32)(_input & _flag) / (_flag / _result)))
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8148
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8149 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
9a799d71034c4e2 drivers/net/ixgbe/ixgbe_main.c Auke Kok 2007-09-15 8150 {
d3d0023979c87ee drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2011-07-15 8151 /* set type for advanced descriptor with frame checksum insertion */
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8152 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8153 IXGBE_ADVTXD_DCMD_DEXT |
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8154 IXGBE_ADVTXD_DCMD_IFCS;
9a799d71034c4e2 drivers/net/ixgbe/ixgbe_main.c Auke Kok 2007-09-15 8155
d3d0023979c87ee drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2011-07-15 8156 /* set HW vlan bit if vlan is present */
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 @8157 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8158 IXGBE_ADVTXD_DCMD_VLE);
3a6a4edaa59273f drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Jacob Keller 2012-05-01 8159
d3d0023979c87ee drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2011-07-15 8160 /* set segmentation enable bits for TSO/FSO */
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8161 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8162 IXGBE_ADVTXD_DCMD_TSE);
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8163
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8164 /* set timestamp bit if present */
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8165 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8166 IXGBE_ADVTXD_MAC_TSTAMP);
9a799d71034c4e2 drivers/net/ixgbe/ixgbe_main.c Auke Kok 2007-09-15 8167
62748b7bde84618 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-07-20 8168 /* insert frame checksum */
472148c320c0d11 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-11-07 8169 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
62748b7bde84618 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2012-07-20 8170
d3d0023979c87ee drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2011-07-15 8171 return cmd_type;
d3d0023979c87ee drivers/net/ethernet/intel/ixgbe/ixgbe_main.c Alexander Duyck 2011-07-15 8172 }
9a799d71034c4e2 drivers/net/ixgbe/ixgbe_main.c Auke Kok 2007-09-15 8173
:::::: The code at line 8157 was first introduced by commit
:::::: 472148c320c0d11245932ba1315bc4ec0667ed57 ixgbe: Update ixgbe Tx flags to improve code efficiency
:::::: TO: Alexander Duyck <alexander.h.duyck at intel.com>
:::::: CC: Jeff Kirsher <jeffrey.t.kirsher at intel.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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