[kbuild-all] [congwang:sockmap1 6/7] include/linux/skmsg.h:475:16: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff

tree: https://github.com/congwang/linux.git sockmap1 head: b2dfda210226f6718a7bab6ba27fca4958cf5fde commit: a2a4da967b9c6fb5571d8cc68866812503806f85 [6/7] fix config: x86_64-randconfig-r033-20210215 (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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/congwang/linux/commit/a2a4da967b9c6fb5571d8cc688668125... git remote add congwang https://github.com/congwang/linux.git git fetch --no-tags congwang sockmap1 git checkout a2a4da967b9c6fb5571d8cc68866812503806f85 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): In file included from net/core/filter.c:37: skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:473:48: note: variable 'skb' declared const here void skb_bpf_set_ingress(const struct sk_buff *skb) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:481:16: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir = (unsigned long)sk_redir; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:483:17: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ 3 errors generated. -- In file included from net/core/skmsg.c:4: skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:473:48: note: variable 'skb' declared const here void skb_bpf_set_ingress(const struct sk_buff *skb) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:481:16: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir = (unsigned long)sk_redir; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:483:17: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ net/core/skmsg.c:819:21: warning: unused variable 'tcp' [-Wunused-variable] struct tcp_skb_cb *tcp; ^ 1 warning and 3 errors generated. -- In file included from net/ipv4/esp4.c:22: In file included from include/net/espintcp.h:6: skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:473:48: note: variable 'skb' declared const here void skb_bpf_set_ingress(const struct sk_buff *skb) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:481:16: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir = (unsigned long)sk_redir; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ include/linux/skmsg.h:483:17: error: cannot assign to variable 'skb' with const-qualified type 'const struct sk_buff *' skb->sk_redir |= BPF_F_INGRESS; ~~~~~~~~~~~~~ ^ include/linux/skmsg.h:479:46: note: variable 'skb' declared const here void skb_bpf_set_redir(const struct sk_buff *skb, struct sock *sk_redir, bool ingress) ~~~~~~~~~~~~~~~~~~~~~~^~~ net/ipv4/esp4.c:1117:5: warning: format specifies type 'unsigned short' but the argument has type 'int' [-Wformat] aalg_desc->uinfo.auth.icv_fullbits / 8); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:373:34: note: expanded from macro 'pr_info' printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ 1 warning and 3 errors generated. vim +475 include/linux/skmsg.h 471 472 static inline 473 void skb_bpf_set_ingress(const struct sk_buff *skb) 474 { 476 } 477 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org