[kbuild-all] [linux-next:master 3550/9127] kernel/trace/ring_buffer.c:2494:1: warning: unused function 'rb_event_is_commit'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: aab7ee9f8ff0110bfcd594b33dc33748dc1baf46 commit: a389d86f7fd0902e4ce4136a5601988dbd371eb1 [3550/9127] ring-buffer: Have nested events still record running time stamp config: mips-randconfig-r005-20200719 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ed6b578040a85977026c93bf4188f996148f3218) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu git checkout a389d86f7fd0902e4ce4136a5601988dbd371eb1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): rb_event_is_commit(struct ring_buffer_per_cpu ^ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set mips64r2 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/bitops.h", .line = 105, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif 1: ll $0, $1 or $0, $2 sc $0, $1 beqz $0, 1b .set pop ' clang-12: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 12.0.0 (git://gitmirror/llvm_project ed6b578040a85977026c93bf4188f996148f3218) Target: mipsel-unknown-linux-gnu Thread model: posix InstalledDir: /opt/cross/clang-ed6b578040/bin clang-12: note: diagnostic msg: Makefile arch include kernel mm null.dwo scripts source usr virt vim +/rb_event_is_commit +2494 kernel/trace/ring_buffer.c 2492 2493 static __always_inline bool 2495 struct ring_buffer_event *event) 2496 { 2497 unsigned long addr = (unsigned long)event; 2498 unsigned long index; 2499 2500 index = rb_event_index(event); 2501 addr &= PAGE_MASK; 2502 2503 return cpu_buffer->commit_page->page == (void *)addr && 2504 rb_commit_index(cpu_buffer) == index; 2505 } 2506 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org