Hi Alexander, Thank you for the patch! Yet something to improve:
[auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Alexander-Lobakin/skbuff-introduce-skbuff_heads-bulking-and-reusing/20210211-004041 base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git de1db4a6ed6241e34cab0e5059d4b56f6bae39b9 config: s390-randconfig-r025-20210209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/0day-ci/linux/commit/6bb224307d9f31afa154a8825f9acbd8e9f6b490 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexander-Lobakin/skbuff-introduce-skbuff_heads-bulking-and-reusing/20210211-004041 git checkout 6bb224307d9f31afa154a8825f9acbd8e9f6b490 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 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 >>): In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ ^ In file included from net/core/dev.c:89: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ ^ In file included from net/core/dev.c:89: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0xff000000UL) >> 24))) ^ In file included from net/core/dev.c:89: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from net/core/dev.c:89: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> net/core/dev.c:7012:4: error: implicit declaration of function >> '__kfree_skb_flush' [-Werror,-Wimplicit-function-declaration] __kfree_skb_flush(); ^ 20 warnings and 1 error generated. vim +/__kfree_skb_flush +7012 net/core/dev.c 29863d41bb6e1d Wei Wang 2021-02-08 6996 29863d41bb6e1d Wei Wang 2021-02-08 6997 static int napi_threaded_poll(void *data) 29863d41bb6e1d Wei Wang 2021-02-08 6998 { 29863d41bb6e1d Wei Wang 2021-02-08 6999 struct napi_struct *napi = data; 29863d41bb6e1d Wei Wang 2021-02-08 7000 void *have; 29863d41bb6e1d Wei Wang 2021-02-08 7001 29863d41bb6e1d Wei Wang 2021-02-08 7002 while (!napi_thread_wait(napi)) { 29863d41bb6e1d Wei Wang 2021-02-08 7003 for (;;) { 29863d41bb6e1d Wei Wang 2021-02-08 7004 bool repoll = false; 29863d41bb6e1d Wei Wang 2021-02-08 7005 29863d41bb6e1d Wei Wang 2021-02-08 7006 local_bh_disable(); 29863d41bb6e1d Wei Wang 2021-02-08 7007 29863d41bb6e1d Wei Wang 2021-02-08 7008 have = netpoll_poll_lock(napi); 29863d41bb6e1d Wei Wang 2021-02-08 7009 __napi_poll(napi, &repoll); 29863d41bb6e1d Wei Wang 2021-02-08 7010 netpoll_poll_unlock(have); 29863d41bb6e1d Wei Wang 2021-02-08 7011 29863d41bb6e1d Wei Wang 2021-02-08 @7012 __kfree_skb_flush(); 29863d41bb6e1d Wei Wang 2021-02-08 7013 local_bh_enable(); 29863d41bb6e1d Wei Wang 2021-02-08 7014 29863d41bb6e1d Wei Wang 2021-02-08 7015 if (!repoll) 29863d41bb6e1d Wei Wang 2021-02-08 7016 break; 29863d41bb6e1d Wei Wang 2021-02-08 7017 29863d41bb6e1d Wei Wang 2021-02-08 7018 cond_resched(); 29863d41bb6e1d Wei Wang 2021-02-08 7019 } 29863d41bb6e1d Wei Wang 2021-02-08 7020 } 29863d41bb6e1d Wei Wang 2021-02-08 7021 return 0; 29863d41bb6e1d Wei Wang 2021-02-08 7022 } 29863d41bb6e1d Wei Wang 2021-02-08 7023 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
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