Hi Vinicius, I love your patch! Perhaps something to improve: [auto build test WARNING on net/master] url: https://github.com/0day-ci/linux/commits/Vinicius-Costa-Gomes/bpf-Fix-bui... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git fceb07950a7aac43d52d8c6ef580399a8b9b68fe config: i386-debian-10.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/1e7a382c089da5714e4a9411765e84815... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vinicius-Costa-Gomes/bpf-Fix-build-when-CONFIG_BPF_SYSCALL-is-disabled/20211110-090148 git checkout 1e7a382c089da5714e4a9411765e84815cf550f9 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash kernel/bpf/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/bpf/btf.c: In function 'btf_seq_show': kernel/bpf/btf.c:5876:22: warning: function 'btf_seq_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 5876 | seq_vprintf((struct seq_file *)show->target, fmt, args); | ^~~~~~~~ kernel/bpf/btf.c: In function 'btf_snprintf_show': kernel/bpf/btf.c:5913:2: warning: function 'btf_snprintf_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 5913 | len = vsnprintf(show->target, ssnprintf->len_left, fmt, args); | ^~~ kernel/bpf/btf.c: At top level: kernel/bpf/btf.c:6370:9: error: variable 'bpf_tcp_ca_kfunc_list' has initializer but incomplete type 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rculist.h:10, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/list.h:21:30: error: extra brace group at end of initializer 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6370:55: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^ include/linux/list.h:21:34: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6370:55: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^ include/linux/list.h:21:43: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rhashtable-types.h:14, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/mutex.h:109:3: error: extra brace group at end of initializer 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mutex.h:109:3: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/uapi/linux/btf.h:6, from kernel/bpf/btf.c:4: include/linux/types.h:170:24: error: extra brace group at end of initializer 170 | #define ATOMIC_INIT(i) { (i) } | ^ include/linux/atomic/atomic-long.h:19:30: note: in expansion of macro 'ATOMIC_INIT' 19 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | ^~~~~~~~~~~ include/linux/mutex.h:109:14: note: in expansion of macro 'ATOMIC_LONG_INIT' 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/types.h:170:24: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 170 | #define ATOMIC_INIT(i) { (i) } | ^ include/linux/atomic/atomic-long.h:19:30: note: in expansion of macro 'ATOMIC_INIT' 19 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | ^~~~~~~~~~~ include/linux/mutex.h:109:14: note: in expansion of macro 'ATOMIC_LONG_INIT' 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rculist.h:10, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/list.h:21:30: error: extra brace group at end of initializer 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ include/linux/mutex.h:111:18: note: in expansion of macro 'LIST_HEAD_INIT' 111 | , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ include/linux/mutex.h:111:18: note: in expansion of macro 'LIST_HEAD_INIT' 111 | , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:32: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^ include/linux/list.h:21:34: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:32: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^ include/linux/list.h:21:43: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rhashtable-types.h:14, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mutex.h:109:3: note: (near initialization for 'bpf_tcp_ca_kfunc_list') 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6370:9: error: variable 'prog_test_kfunc_list' has initializer but incomplete type 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rculist.h:10, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/list.h:21:30: error: extra brace group at end of initializer 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'prog_test_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6370:55: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^ include/linux/list.h:21:34: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6370:55: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^ include/linux/list.h:21:43: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'prog_test_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ kernel/bpf/btf.c:6370:36: note: in expansion of macro 'LIST_HEAD_INIT' 6370 | struct kfunc_btf_id_list name = { LIST_HEAD_INIT(name.list), \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rhashtable-types.h:14, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/mutex.h:109:3: error: extra brace group at end of initializer 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mutex.h:109:3: note: (near initialization for 'prog_test_kfunc_list') 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/uapi/linux/btf.h:6, from kernel/bpf/btf.c:4: include/linux/types.h:170:24: error: extra brace group at end of initializer 170 | #define ATOMIC_INIT(i) { (i) } | ^ include/linux/atomic/atomic-long.h:19:30: note: in expansion of macro 'ATOMIC_INIT' 19 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | ^~~~~~~~~~~ include/linux/mutex.h:109:14: note: in expansion of macro 'ATOMIC_LONG_INIT' 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/types.h:170:24: note: (near initialization for 'prog_test_kfunc_list') 170 | #define ATOMIC_INIT(i) { (i) } | ^ include/linux/atomic/atomic-long.h:19:30: note: in expansion of macro 'ATOMIC_INIT' 19 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | ^~~~~~~~~~~ include/linux/mutex.h:109:14: note: in expansion of macro 'ATOMIC_LONG_INIT' 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rculist.h:10, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: include/linux/list.h:21:30: error: extra brace group at end of initializer 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ include/linux/mutex.h:111:18: note: in expansion of macro 'LIST_HEAD_INIT' 111 | , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:21:30: note: (near initialization for 'prog_test_kfunc_list') 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^ include/linux/mutex.h:111:18: note: in expansion of macro 'LIST_HEAD_INIT' 111 | , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:32: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^ include/linux/list.h:21:34: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6371:32: error: invalid use of undefined type 'struct kfunc_btf_id_list' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^ include/linux/list.h:21:43: note: in definition of macro 'LIST_HEAD_INIT' 21 | #define LIST_HEAD_INIT(name) { &(name), &(name) } | ^~~~ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rhashtable-types.h:14, from include/linux/ipc.h:7, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/sched.h:15, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/mutex.h:109:3: note: (near initialization for 'prog_test_kfunc_list') 109 | { .owner = ATOMIC_LONG_INIT(0) \ | ^ kernel/bpf/btf.c:6371:8: note: in expansion of macro '__MUTEX_INITIALIZER' 6371 | __MUTEX_INITIALIZER(name.mutex) }; \ | ^~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/linkage.h:7, from include/linux/kernel.h:8, from arch/x86/include/asm/percpu.h:27, from arch/x86/include/asm/current.h:6, from include/linux/sched.h:12, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: kernel/bpf/btf.c:6374:26: error: storage size of 'bpf_tcp_ca_kfunc_list' isn't known 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:21: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:160:34: note: in expansion of macro '__EXPORT_SYMBOL' 160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:164:33: note: in expansion of macro '_EXPORT_SYMBOL' 164 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl") | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6372:2: note: in expansion of macro 'EXPORT_SYMBOL_GPL' 6372 | EXPORT_SYMBOL_GPL(name) | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:26: error: storage size of 'bpf_tcp_ca_kfunc_list' isn't known 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:21: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:160:34: note: in expansion of macro '__EXPORT_SYMBOL' 160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:164:33: note: in expansion of macro '_EXPORT_SYMBOL' 164 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl") | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6372:2: note: in expansion of macro 'EXPORT_SYMBOL_GPL' 6372 | EXPORT_SYMBOL_GPL(name) | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6374:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6374 | DEFINE_KFUNC_BTF_ID_LIST(bpf_tcp_ca_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:26: error: storage size of 'prog_test_kfunc_list' isn't known 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:21: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:160:34: note: in expansion of macro '__EXPORT_SYMBOL' 160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:164:33: note: in expansion of macro '_EXPORT_SYMBOL' 164 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl") | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6372:2: note: in expansion of macro 'EXPORT_SYMBOL_GPL' 6372 | EXPORT_SYMBOL_GPL(name) | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:26: error: storage size of 'prog_test_kfunc_list' isn't known 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:21: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:160:34: note: in expansion of macro '__EXPORT_SYMBOL' 160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:164:33: note: in expansion of macro '_EXPORT_SYMBOL' 164 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl") | ^~~~~~~~~~~~~~ kernel/bpf/btf.c:6372:2: note: in expansion of macro 'EXPORT_SYMBOL_GPL' 6372 | EXPORT_SYMBOL_GPL(name) | ^~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:6375:1: note: in expansion of macro 'DEFINE_KFUNC_BTF_ID_LIST' 6375 | DEFINE_KFUNC_BTF_ID_LIST(prog_test_kfunc_list); | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +21 include/linux/list.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 10 ^1da177e4c3f41 Linus Torvalds 2005-04-16 11 /* 1eafe075bf9cb4 Asif Rasheed 2020-09-20 12 * Circular doubly linked list implementation. ^1da177e4c3f41 Linus Torvalds 2005-04-16 13 * ^1da177e4c3f41 Linus Torvalds 2005-04-16 14 * Some of the internal functions ("__xxx") are useful when ^1da177e4c3f41 Linus Torvalds 2005-04-16 15 * manipulating whole lists rather than single entries, as ^1da177e4c3f41 Linus Torvalds 2005-04-16 16 * sometimes we already know the next/prev entries and we can ^1da177e4c3f41 Linus Torvalds 2005-04-16 17 * generate better code by using them directly rather than ^1da177e4c3f41 Linus Torvalds 2005-04-16 18 * using the generic single-entry routines. ^1da177e4c3f41 Linus Torvalds 2005-04-16 19 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 20 ^1da177e4c3f41 Linus Torvalds 2005-04-16 @21 #define LIST_HEAD_INIT(name) { &(name), &(name) } ^1da177e4c3f41 Linus Torvalds 2005-04-16 22 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org