Hi Menglong,
kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Menglong-Dong/bpf-tracing-add... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240311093526.1010158-7-dongmenglong.8%40bytedanc... patch subject: [PATCH bpf-next v2 6/9] bpf: tracing: add multi-link support config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240312/202403120218.Me518kSk-lkp@i...) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 503c55e17037436dcd45ac69dea8967e67e3f5e8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240312/202403120218.Me518kSk-lkp@i...)
If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot lkp@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202403120218.Me518kSk-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/bpf/syscall.c:4: In file included from include/linux/bpf.h:31: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from kernel/bpf/syscall.c:4: In file included from include/linux/bpf.h:31: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ In file included from kernel/bpf/syscall.c:4: include/linux/bpf.h:751:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 751 | ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~ include/linux/bpf.h:752:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 752 | ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ include/linux/bpf.h:753:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 753 | ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ include/linux/bpf.h:754:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 754 | ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/bpf.h:755:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 755 | ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~ include/linux/bpf.h:756:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 756 | ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/bpf.h:760:38: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 760 | ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM, | ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ include/linux/bpf.h:762:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion] 762 | ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ include/linux/bpf.h:785:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 785 | RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~ include/linux/bpf.h:786:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 786 | RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/bpf.h:787:47: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 787 | RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~ include/linux/bpf.h:788:50: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 788 | RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ include/linux/bpf.h:790:49: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 790 | RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MEM, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ include/linux/bpf.h:791:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 791 | RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/bpf.h:792:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion] 792 | RET_PTR_TO_BTF_ID_TRUSTED = PTR_TRUSTED | RET_PTR_TO_BTF_ID, | ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/bpf.h:903:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion] 903 | PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~ include/linux/bpf.h:904:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion] 904 | PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~ include/linux/bpf.h:905:46: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion] 905 | PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~ include/linux/bpf.h:906:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion] 906 | PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ include/linux/bpf.h:907:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion] 907 | PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~
kernel/bpf/syscall.c:3538:2: error: call to undeclared function 'bpf_trampoline_multi_unlink_prog'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
3538 | bpf_trampoline_multi_unlink_prog(&multi_link->link); | ^ kernel/bpf/syscall.c:3538:2: note: did you mean 'bpf_trampoline_unlink_prog'? include/linux/bpf.h:1368:19: note: 'bpf_trampoline_unlink_prog' declared here 1368 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, | ^
kernel/bpf/syscall.c:3815:8: error: call to undeclared function 'bpf_trampoline_multi_link_prog'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
3815 | err = bpf_trampoline_multi_link_prog(&link->link); | ^ kernel/bpf/syscall.c:3815:8: note: did you mean 'bpf_trampoline_unlink_prog'? include/linux/bpf.h:1368:19: note: 'bpf_trampoline_unlink_prog' declared here 1368 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, | ^ kernel/bpf/syscall.c:3821:3: error: call to undeclared function 'bpf_trampoline_multi_unlink_prog'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 3821 | bpf_trampoline_multi_unlink_prog(&link->link); | ^ kernel/bpf/syscall.c:6204:30: warning: bitwise operation between different enumeration types ('enum bpf_arg_type' and 'enum bpf_type_flag') [-Wenum-enum-conversion] 6204 | .arg2_type = ARG_PTR_TO_MEM | MEM_RDONLY, | ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~ 28 warnings and 3 errors generated.
vim +/bpf_trampoline_multi_unlink_prog +3538 kernel/bpf/syscall.c
3532 3533 static void bpf_tracing_multi_link_release(struct bpf_link *link) 3534 { 3535 struct bpf_tracing_multi_link *multi_link = 3536 container_of(link, struct bpf_tracing_multi_link, link.link); 3537
3538 bpf_trampoline_multi_unlink_prog(&multi_link->link);
3539 __bpf_tracing_multi_link_release(multi_link); 3540 } 3541