Hi Masami, kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master] [also build test ERROR on v7.0-rc1 next-20260226] [cannot apply to trace/for-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Masami-Hiramatsu-Google/ring-buffer-Flush-and-stop-persistent-ring-buffer-on-panic/20260226-222418 base: linus/master patch link: https://lore.kernel.org/r/177211311593.419230.2212568977306190482.stgit%40mhiramat.tok.corp.google.com patch subject: [PATCH v5 1/3] ring-buffer: Flush and stop persistent ring buffer on panic config: sparc64-defconfig (https://download.01.org/0day-ci/archive/20260227/[email protected]/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260227/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): >> kernel/trace/ring_buffer.c:2481:2: error: call to undeclared function >> 'flush_cache_all'; ISO C99 and later do not support implicit function >> declarations [-Wimplicit-function-declaration] 2481 | flush_cache_all(); | ^ kernel/trace/ring_buffer.c:2481:2: note: did you mean 'flush_dcache_page'? arch/sparc/include/asm/cacheflush_64.h:51:20: note: 'flush_dcache_page' declared here 51 | static inline void flush_dcache_page(struct page *page) | ^ 1 error generated. vim +/flush_cache_all +2481 kernel/trace/ring_buffer.c 2475 2476 static int rb_flush_buffer_cb(struct notifier_block *nb, unsigned long event, void *data) 2477 { 2478 struct trace_buffer *buffer = container_of(nb, struct trace_buffer, flush_nb); 2479 2480 ring_buffer_record_off(buffer); > 2481 flush_cache_all(); 2482 return NOTIFY_DONE; 2483 } 2484 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
