Messages in this thread | | | Date | Thu, 9 Sep 2021 18:57:33 +0800 | From | kernel test robot <> | Subject | [linux-rt-devel:linux-5.14.y-rt-rebase 245/263] kernel/sched/core.c:6336:19: warning: unused function 'preemptible_lazy' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.14.y-rt-rebase head: a1ea175d809fdb71148c7f6ff7f3f59b9b47b257 commit: 7ac22c0eae125aba94455aae5ac98daf623d4174 [245/263] sched: Add support for lazy preemption config: mips-randconfig-r004-20210908 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=7ac22c0eae125aba94455aae5ac98daf623d4174 git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git git fetch --no-tags linux-rt-devel linux-5.14.y-rt-rebase git checkout 7ac22c0eae125aba94455aae5ac98daf623d4174 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=mips SHELL=/bin/bash kernel/sched/
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
kernel/sched/core.c:3320:20: warning: unused function 'rq_has_pinned_tasks' static inline bool rq_has_pinned_tasks(struct rq ^ kernel/sched/core.c:5214:20: warning: unused function 'sched_tick_start' static inline void sched_tick_start(int cpu) { } ^ kernel/sched/core.c:5215:20: warning: unused function 'sched_tick_stop' static inline void sched_tick_stop(int cpu) { } ^ kernel/sched/core.c:5944:20: warning: unused function 'sched_core_cpu_starting' static inline void sched_core_cpu_starting(unsigned int cpu) {} ^ kernel/sched/core.c:5945:20: warning: unused function 'sched_core_cpu_deactivate' static inline void sched_core_cpu_deactivate(unsigned int cpu) {} ^ kernel/sched/core.c:5946:20: warning: unused function 'sched_core_cpu_dying' static inline void sched_core_cpu_dying(unsigned int cpu) {} ^ >> kernel/sched/core.c:6336:19: warning: unused function 'preemptible_lazy' static inline int preemptible_lazy(void) ^ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set noat .set push .set arch=r4000 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/cmpxchg.h", .line = 163, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif 1: ll $0, $2 # __cmpxchg_asm bne $0, ${3:z}, 2f .set pop move $$1, ${4:z} .set arch=r4000 sc $$1, $1 beqz $$1, 1b .set pop 2: .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/cmpxchg.h", .line = 163, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif ' clang-14: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 14.0.0 (git://gitmirror/llvm_project 261cbe98c38f8c1ee1a482fe76511110e790f58a) Target: mipsel-unknown-linux Thread model: posix InstalledDir: /opt/cross/clang-261cbe98c3/bin clang-14: note: diagnostic msg: Makefile arch include kernel nr_bisected scripts source usr
vim +/preemptible_lazy +6336 kernel/sched/core.c
6335 > 6336 static inline int preemptible_lazy(void) 6337 { 6338 return 1; 6339 } 6340
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