tree: https://github.com/0day-ci/linux/commits/UPDATE-20210417-000536/Marcelo-T... head: 69994d721a37e41ea46e52c6642883e27c15d9d8 commit: 69994d721a37e41ea46e52c6642883e27c15d9d8 hrtimer: avoid retrigger_next_event IPI date: 4 days ago config: mips-randconfig-r023-20210420 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) 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 # https://github.com/0day-ci/linux/commit/69994d721a37e41ea46e52c6642883e27... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210417-000536/Marcelo-Tosatti/hrtimer-avoid-retrigger_next_event-IPI/20210407-233005 git checkout 69994d721a37e41ea46e52c6642883e27c15d9d8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject = HRTIMER_BASE_REALTIME, ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject = HRTIMER_BASE_MONOTONIC, ^~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject = HRTIMER_BASE_BOOTTIME, ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject = HRTIMER_BASE_TAI, ^~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:118:27: note: previous initialization is here [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES, ^~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:147:20: warning: unused function 'is_migration_base' static inline bool is_migration_base(struct hrtimer_clock_base ^ static inline void __hrtimer_peek_ahead_timers(void) ^ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set mips64r2 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( 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-13: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 13.0.0 (git://gitmirror/llvm_project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) Target: mipsel-unknown-linux-gnu Thread model: posix InstalledDir: /opt/cross/clang-ca8eef7e3d/bin clang-13: note: diagnostic msg: Makefile arch include kernel mm scripts source usr vim +/__hrtimer_peek_ahead_timers +1764 kernel/time/hrtimer.c 54cdfdb47f73b5 kernel/hrtimer.c Thomas Gleixner 2007-02-16 1762 016da20148a169 kernel/time/hrtimer.c Stephen Boyd 2017-03-16 1763 /* called with interrupts disabled */ c6eb3f70d44828 kernel/time/hrtimer.c Thomas Gleixner 2015-04-14 @1764 static inline void __hrtimer_peek_ahead_timers(void) 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1765 { 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1766 struct tick_device *td; 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1767 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1768 if (!hrtimer_hres_active()) 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1769 return; 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1770 22127e93c587af kernel/time/hrtimer.c Christoph Lameter 2014-08-17 1771 td = this_cpu_ptr(&tick_cpu_device); 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1772 if (td && td->evtdev) 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1773 hrtimer_interrupt(td->evtdev); 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1774 } 8bdec955b0da2f kernel/hrtimer.c Thomas Gleixner 2009-01-05 1775 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org