tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: ecca3ab84cbf3cf5ec32574bcec8a068e79d14df commit: 36ff49c95a04513935898fdcd4bc37646b2dc459 [9406/23766] posix-cpu-timers: Sanitize bogus WARNONS config: x86_64-buildonly-randconfig-002-20240923 (https://download.01.org/0day-ci/archive/20240925/202409251901.etAiBSp6-lkp@i...) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240925/202409251901.etAiBSp6-lkp@i...) 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/202409251901.etAiBSp6-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

kernel/time/.tmp_posix-cpu-timers.o: warning: objtool: set_process_cpu_timer()+0xc7: unreachable instruction

objdump-func vmlinux.o set_process_cpu_timer: 0000 000000000011ca20 <set_process_cpu_timer>: 0000 11ca20: f3 0f 1e fa endbr64 0004 11ca24: 83 fe 02 cmp $0x2,%esi 0007 11ca27: 0f 83 82 00 00 00 jae 11caaf <set_process_cpu_timer+0x8f> 000d 11ca2d: 41 57 push %r15 000f 11ca2f: 41 56 push %r14 0011 11ca31: 53 push %rbx 0012 11ca32: 49 89 ce mov %rcx,%r14 0015 11ca35: 48 89 d3 mov %rdx,%rbx 0018 11ca38: 48 89 f8 mov %rdi,%rax 001b 11ca3b: 48 8b 8f a8 05 00 00 mov 0x5a8(%rdi),%rcx 0022 11ca42: 89 f2 mov %esi,%edx 0024 11ca44: 48 8d 14 52 lea (%rdx,%rdx,2),%rdx 0028 11ca48: 4c 8d bc d1 88 02 00 00 lea 0x288(%rcx,%rdx,8),%r15 0030 11ca50: 89 f7 mov %esi,%edi 0032 11ca52: 48 89 c6 mov %rax,%rsi 0035 11ca55: ba 01 00 00 00 mov $0x1,%edx 003a 11ca5a: e8 41 09 00 00 call 11d3a0 <cpu_clock_sample_group> 003f 11ca5f: 4d 85 f6 test %r14,%r14 0042 11ca62: 74 2c je 11ca90 <set_process_cpu_timer+0x70> 0044 11ca64: 49 8b 0e mov (%r14),%rcx 0047 11ca67: 48 85 c9 test %rcx,%rcx 004a 11ca6a: 74 0f je 11ca7b <set_process_cpu_timer+0x5b> 004c 11ca6c: 48 29 c1 sub %rax,%rcx 004f 11ca6f: ba 00 09 3d 00 mov $0x3d0900,%edx 0054 11ca74: 48 0f 47 d1 cmova %rcx,%rdx 0058 11ca78: 49 89 16 mov %rdx,(%r14) 005b 11ca7b: 48 8b 0b mov (%rbx),%rcx 005e 11ca7e: 48 85 c9 test %rcx,%rcx 0061 11ca81: 74 23 je 11caa6 <set_process_cpu_timer+0x86> 0063 11ca83: 48 01 c1 add %rax,%rcx 0066 11ca86: 48 89 0b mov %rcx,(%rbx) 0069 11ca89: 49 3b 0f cmp (%r15),%rcx 006c 11ca8c: 72 0a jb 11ca98 <set_process_cpu_timer+0x78> 006e 11ca8e: eb 0b jmp 11ca9b <set_process_cpu_timer+0x7b> 0070 11ca90: 48 8b 0b mov (%rbx),%rcx 0073 11ca93: 49 3b 0f cmp (%r15),%rcx 0076 11ca96: 73 03 jae 11ca9b <set_process_cpu_timer+0x7b> 0078 11ca98: 49 89 0f mov %rcx,(%r15) 007b 11ca9b: 5b pop %rbx 007c 11ca9c: 41 5e pop %r14 007e 11ca9e: 41 5f pop %r15 0080 11caa0: 2e e9 00 00 00 00 cs jmp 11caa6 <set_process_cpu_timer+0x86> 11caa2: R_X86_64_PLT32 __x86_return_thunk-0x4 0086 11caa6: 31 c9 xor %ecx,%ecx 0088 11caa8: 49 3b 0f cmp (%r15),%rcx 008b 11caab: 72 eb jb 11ca98 <set_process_cpu_timer+0x78> 008d 11caad: eb ec jmp 11ca9b <set_process_cpu_timer+0x7b> 008f 11caaf: 0f 0b ud2 0091 11cab1: 2e e9 00 00 00 00 cs jmp 11cab7 <set_process_cpu_timer+0x97> 11cab3: R_X86_64_PLT32 __x86_return_thunk-0x4 0097 11cab7: 66 0f 1f 84 00 00 00 00 00 nopw 0x0(%rax,%rax,1) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki