Hi Joanne, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Joanne-Koong/Add-skb-xdp-dynptrs/20220901-024122 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: hexagon-randconfig-r045-20220831 (https://download.01.org/0day-ci/archive/20220901/202209010925.Du4GHGW9-lkp@xxxxxxxxx/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4) 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 # https://github.com/intel-lab-lkp/linux/commit/273adaa44c063c460e9a23123957a1864c5cc26c git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Joanne-Koong/Add-skb-xdp-dynptrs/20220901-024122 git checkout 273adaa44c063c460e9a23123957a1864c5cc26c # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): In file included from kernel/sysctl.c:35: >> include/linux/filter.h:1540:5: warning: no previous prototype for function '__bpf_skb_load_bytes' [-Wmissing-prototypes] int __bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) ^ include/linux/filter.h:1540:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) ^ static >> include/linux/filter.h:1545:5: warning: no previous prototype for function '__bpf_skb_store_bytes' [-Wmissing-prototypes] int __bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, ^ include/linux/filter.h:1545:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, ^ static 2 warnings generated. -- In file included from kernel/kallsyms.c:25: >> include/linux/filter.h:1540:5: warning: no previous prototype for function '__bpf_skb_load_bytes' [-Wmissing-prototypes] int __bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) ^ include/linux/filter.h:1540:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) ^ static >> include/linux/filter.h:1545:5: warning: no previous prototype for function '__bpf_skb_store_bytes' [-Wmissing-prototypes] int __bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, ^ include/linux/filter.h:1545:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, ^ static kernel/kallsyms.c:570:12: warning: no previous prototype for function 'arch_get_kallsym' [-Wmissing-prototypes] int __weak arch_get_kallsym(unsigned int symnum, unsigned long *value, ^ kernel/kallsyms.c:570:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __weak arch_get_kallsym(unsigned int symnum, unsigned long *value, ^ static 3 warnings generated. -- >> ld.lld: error: duplicate symbol: __bpf_skb_load_bytes >>> defined at filter.h:1542 (include/linux/filter.h:1542) >>> sysctl.o:(__bpf_skb_load_bytes) in archive kernel/built-in.a >>> defined at filter.h:1542 (include/linux/filter.h:1542) >>> extable.o:(.text+0x0) in archive kernel/built-in.a -- >> ld.lld: error: duplicate symbol: __bpf_skb_store_bytes >>> defined at filter.h:1548 (include/linux/filter.h:1548) >>> sysctl.o:(__bpf_skb_store_bytes) in archive kernel/built-in.a >>> defined at filter.h:1548 (include/linux/filter.h:1548) >>> extable.o:(.text+0x8) in archive kernel/built-in.a -- >> ld.lld: error: duplicate symbol: __bpf_skb_load_bytes >>> defined at filter.h:1542 (include/linux/filter.h:1542) >>> sysctl.o:(__bpf_skb_load_bytes) in archive kernel/built-in.a >>> defined at filter.h:1542 (include/linux/filter.h:1542) >>> kallsyms.o:(.text+0x0) in archive kernel/built-in.a -- >> ld.lld: error: duplicate symbol: __bpf_skb_store_bytes >>> defined at filter.h:1548 (include/linux/filter.h:1548) >>> sysctl.o:(__bpf_skb_store_bytes) in archive kernel/built-in.a >>> defined at filter.h:1548 (include/linux/filter.h:1548) >>> kallsyms.o:(.text+0x8) in archive kernel/built-in.a -- 0-DAY CI Kernel Test Service https://01.org/lkp
