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

kernel test robot
2025-01-26T17:32:59Z

head: aa22f4da2a46b484a257d167c67a2adc1b7aaf68
commit: 7caa9765465f60b6d88e22264892cee12d971888 ftrace: riscv: move from REGS to ARGS
date: 8 months ago
config: riscv-randconfig-002-20250127 (https://download.01.org/0day-ci/archive/20250127/202501270111.x1TyJKg8-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250127/202501270111.x1TyJKg8-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501270111.x1TyJKg8-lkp@intel.com/

All errors (new ones prefixed by >>):

scripts/genksyms/parse.y: warning: 9 shift/reduce conflicts [-Wconflicts-sr]
scripts/genksyms/parse.y: warning: 5 reduce/reduce conflicts [-Wconflicts-rr]
scripts/genksyms/parse.y: note: rerun with option '-Wcounterexamples' to generate conflict counterexamples
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]
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
static __always_inline struct pt_regs *ftrace_get_regs(struct ftrace_regs *fregs)
^
>> 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]
return arch_ftrace_get_regs(fregs);
^~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
make[3]: *** [scripts/Makefile.build:117: arch/riscv/kernel/asm-offsets.s] Error 1 shuffle=3312181336
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1203: prepare0] Error 2 shuffle=3312181336
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:240: __sub-make] Error 2 shuffle=3312181336
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:240: __sub-make] Error 2 shuffle=3312181336