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Mon, 11 Jul 2022 21:41:41 +0000 Date: Tue, 12 Jul 2022 05:41:39 +0800 From: kernel test robot To: Jiri Olsa Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [jolsa-perf:bpf/tramp_29 25/32] kernel/bpf/trampoline.c:948:9: error: call to undeclared function 'ftrace_hash_alloc'; ISO C99 and later do not support implicit function declarations Message-ID: <202207120555.rWXO6yao-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tramp_29 head: ec522c20e55e48f561146afbb81513e20870ee12 commit: f8f16c805972e534643c5a5d23709766f7af22e4 [25/32] bpf: Add support to attach multi trampolines config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220712/202207120555.rWXO6yao-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project badda4ac3c489a8c8cccdad1f74b9308c350a9e0) 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://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=f8f16c805972e534643c5a5d23709766f7af22e4 git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git git fetch --no-tags jolsa-perf bpf/tramp_29 git checkout f8f16c805972e534643c5a5d23709766f7af22e4 # 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=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): >> kernel/bpf/trampoline.c:948:9: error: call to undeclared function 'ftrace_hash_alloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] hash = ftrace_hash_alloc(FTRACE_HASH_MAX_BITS); ^ >> kernel/bpf/trampoline.c:948:27: error: use of undeclared identifier 'FTRACE_HASH_MAX_BITS' hash = ftrace_hash_alloc(FTRACE_HASH_MAX_BITS); ^ >> kernel/bpf/trampoline.c:975:5: error: call to undeclared function 'ftrace_hash_add_entry'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] ftrace_hash_add_entry(hash, entry); ^ kernel/bpf/trampoline.c:985:4: error: call to undeclared function 'ftrace_hash_add_entry'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] ftrace_hash_add_entry(hash, entry); ^ >> kernel/bpf/trampoline.c:989:8: error: call to undeclared function 'set_ftrace_direct'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] err = set_ftrace_direct(hash); ^ >> kernel/bpf/trampoline.c:991:2: error: call to undeclared function 'ftrace_hash_free'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] ftrace_hash_free(hash); ^ 6 errors generated. vim +/ftrace_hash_alloc +948 kernel/bpf/trampoline.c 941 942 static int bpf_tramp_update_set(struct list_head *upd) 943 { 944 struct bpf_trampoline *tr; 945 struct ftrace_hash *hash; 946 int i, err; 947 > 948 hash = ftrace_hash_alloc(FTRACE_HASH_MAX_BITS); 949 if (!hash) 950 return -ENOMEM; 951 952 list_for_each_entry(tr, upd, update.list) { 953 struct ftrace_func_entry *entry; 954 unsigned long direct; 955 956 switch (tr->update.action) { 957 case BPF_TRAMP_UPDATE_REG: 958 case BPF_TRAMP_UPDATE_MODIFY: 959 direct = (unsigned long) tr->update.im->image; 960 break; 961 case BPF_TRAMP_UPDATE_UNREG: 962 direct = 0; 963 break; 964 } 965 966 if (tr->multi.id_multi) { 967 for (i = 0; i < tr->multi.id_multi->cnt; i++) { 968 entry = kmalloc(sizeof(*entry), GFP_KERNEL); 969 if (!entry) { 970 err = -ENOMEM; 971 goto out_free; 972 } 973 entry->ip = (unsigned long) tr->multi.id_multi->addr[i]; 974 entry->direct = direct; > 975 ftrace_hash_add_entry(hash, entry); 976 } 977 } else { 978 entry = kmalloc(sizeof(*entry), GFP_KERNEL); 979 if (!entry) { 980 err = -ENOMEM; 981 goto out_free; 982 } 983 entry->ip = (unsigned long) tr->func.addr; 984 entry->direct = direct; 985 ftrace_hash_add_entry(hash, entry); 986 } 987 } 988 > 989 err = set_ftrace_direct(hash); 990 out_free: > 991 ftrace_hash_free(hash); 992 return err; 993 } 994 -- 0-DAY CI Kernel Test Service https://01.org/lkp