kernel/time/hrtimer.c:1764:20: warning: unused function '__hrtimer_peek_ahead_timers'

[kernel test robot <lkp@intel.com>]

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tree:   https://github.com/0day-ci/linux/commits/UPDATE-20210417-000536/Marcelo-Tosatti/hrtimer-avoid-retrigger_next_event-IPI/20210407-233005
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/69994d721a37e41ea46e52c6642883e27c15d9d8
        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@intel.com>

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
   ^
>> kernel/time/hrtimer.c:1764:20: warning: unused function '__hrtimer_peek_ahead_timers'
   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(a)lists.01.org

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