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ISO C99 and later do not support implicit function declarations Message-ID: <202409170931.PtyPpRfV-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Puranjay, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a430d95c5efa2b545d26a094eb5f624e36732af0 commit: 7caa9765465f60b6d88e22264892cee12d971888 ftrace: riscv: move from REGS to ARGS date: 4 months ago config: riscv-randconfig-002-20240917 (https://download.01.org/0day-ci/archive/20240917/202409170931.PtyPpRfV-lkp@intel.com/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project bf684034844c660b778f0eba103582f582b710c9) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240917/202409170931.PtyPpRfV-lkp@intel.com/reproduce) 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 | Closes: https://lore.kernel.org/oe-kbuild-all/202409170931.PtyPpRfV-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from arch/riscv/kernel/asm-offsets.c:10: In file included from include/linux/mm.h:2253: include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ In file included from arch/riscv/kernel/asm-offsets.c:12: >> include/linux/ftrace.h:138:9: error: call to undeclared function 'arch_ftrace_get_regs'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 138 | return arch_ftrace_get_regs(fregs); | ^ include/linux/ftrace.h:138:9: note: did you mean 'ftrace_get_regs'? include/linux/ftrace.h:133:40: note: 'ftrace_get_regs' declared here 133 | static __always_inline struct pt_regs *ftrace_get_regs(struct ftrace_regs *fregs) | ^ 134 | { 135 | if (!fregs) 136 | return NULL; 137 | 138 | return arch_ftrace_get_regs(fregs); | ~~~~~~~~~~~~~~~~~~~~ | ftrace_get_regs >> include/linux/ftrace.h:138:9: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'struct pt_regs *' [-Wint-conversion] 138 | return arch_ftrace_get_regs(fregs); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning and 2 errors generated. make[3]: *** [scripts/Makefile.build:117: arch/riscv/kernel/asm-offsets.s] Error 1 shuffle=2879536417 make[3]: Target 'prepare' not remade because of errors. make[2]: *** [Makefile:1203: prepare0] Error 2 shuffle=2879536417 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:240: __sub-make] Error 2 shuffle=2879536417 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:240: __sub-make] Error 2 shuffle=2879536417 make: Target 'prepare' not remade because of errors. vim +/arch_ftrace_get_regs +138 include/linux/ftrace.h d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 132) d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 133) static __always_inline struct pt_regs *ftrace_get_regs(struct ftrace_regs *fregs) d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 134) { d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 135) if (!fregs) d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 136) return NULL; d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 137) 02a474ca266a47 Steven Rostedt (VMware 2020-10-27 @138) return arch_ftrace_get_regs(fregs); d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 139) } d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 140) :::::: The code at line 138 was first introduced by commit :::::: 02a474ca266a47ea8f4d5a11f4ffa120f83730ad ftrace/x86: Allow for arguments to be passed in to ftrace_regs by default :::::: TO: Steven Rostedt (VMware) :::::: CC: Steven Rostedt (VMware) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki