tree: https://github.com/zen-kernel/zen-kernel 5.8/muqss head: db04c0928ec2c38291ffb330ee4ce8217c73f069 commit: a7fe15e65f195714f080517f5a81303badc46dd9 [1/24] MultiQueue Skiplist Scheduler v0.202 config: sparc-randconfig-r015-20200823 (attached as .config) compiler: sparc64-linux-gcc (GCC) 9.3.0 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 git checkout a7fe15e65f195714f080517f5a81303badc46dd9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): kernel/sched/MuQSS.c:139:36: error: 'CONFIG_SHARERQ' undeclared here (not in a function); did you mean 'CONFIG_SPARSE_IRQ'? 139 | static int rqshare __read_mostly = CONFIG_SHARERQ; /* Default RQSHARE_MC */ | ^~~~~~~~~~~~~~ | CONFIG_SPARSE_IRQ kernel/sched/MuQSS.c:637:6: warning: no previous prototype for 'resched_task' [-Wmissing-prototypes] 637 | void resched_task(struct task_struct *p) | ^~~~~~~~~~~~ kernel/sched/MuQSS.c: In function 'idleprio_suitable': kernel/sched/MuQSS.c:815:12: error: implicit declaration of function 'task_contributes_to_load' [-Werror=implicit-function-declaration] 815 | return (!(task_contributes_to_load(p)) && !(p->flags & (PF_EXITING)) && | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/MuQSS.c: In function 'ttwu_stat': kernel/sched/MuQSS.c:1673:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 1673 | struct rq *rq; | ^~ kernel/sched/MuQSS.c: At top level: kernel/sched/MuQSS.c:2932:15: warning: no previous prototype for 'nr_active' [-Wmissing-prototypes] 2932 | unsigned long nr_active(void) | ^~~~~~~~~ kernel/sched/MuQSS.c: In function '__schedule_bug': kernel/sched/MuQSS.c:3846:16: warning: passing argument 1 of 'print_ip_sym' makes pointer from integer without a cast [-Wint-conversion] 3846 | print_ip_sym(preempt_disable_ip); | ^~~~~~~~~~~~~~~~~~ | | | long unsigned int In file included from include/linux/ftrace.h:11, from include/linux/init_task.h:9, from kernel/sched/MuQSS.c:44: include/linux/kallsyms.h:169:45: note: expected 'const char *' but argument is of type 'long unsigned int' 169 | static inline void print_ip_sym(const char *loglvl, unsigned long ip) | ~~~~~~~~~~~~^~~~~~ kernel/sched/MuQSS.c:3846:3: error: too few arguments to function 'print_ip_sym' 3846 | print_ip_sym(preempt_disable_ip); | ^~~~~~~~~~~~ In file included from include/linux/ftrace.h:11, from include/linux/init_task.h:9, from kernel/sched/MuQSS.c:44: include/linux/kallsyms.h:169:20: note: declared here 169 | static inline void print_ip_sym(const char *loglvl, unsigned long ip) | ^~~~~~~~~~~~ kernel/sched/MuQSS.c: At top level: 4225 | asmlinkage __visible void __sched schedule_user(void) | ^~~~~~~~~~~~~ kernel/sched/MuQSS.c: In function 'sched_show_task': kernel/sched/MuQSS.c:5807:2: error: too few arguments to function 'show_stack' 5807 | show_stack(p, NULL); | ^~~~~~~~~~ In file included from kernel/sched/MuQSS.h:9, from kernel/sched/MuQSS.c:71: include/linux/sched/debug.h:33:13: note: declared here 33 | extern void show_stack(struct task_struct *task, unsigned long *sp, | ^~~~~~~~~~ kernel/sched/MuQSS.c: At top level: kernel/sched/MuQSS.c:6000:6: warning: no previous prototype for 'resched_cpu' [-Wmissing-prototypes] 6000 | void resched_cpu(int cpu) | ^~~~~~~~~~~ kernel/sched/MuQSS.c: In function '___might_sleep': kernel/sched/MuQSS.c:7374:16: warning: passing argument 1 of 'print_ip_sym' makes pointer from integer without a cast [-Wint-conversion] 7374 | print_ip_sym(preempt_disable_ip); | ^~~~~~~~~~~~~~~~~~ | | | long unsigned int In file included from include/linux/ftrace.h:11, from include/linux/init_task.h:9, from kernel/sched/MuQSS.c:44: include/linux/kallsyms.h:169:45: note: expected 'const char *' but argument is of type 'long unsigned int' 169 | static inline void print_ip_sym(const char *loglvl, unsigned long ip) | ~~~~~~~~~~~~^~~~~~ kernel/sched/MuQSS.c:7374:3: error: too few arguments to function 'print_ip_sym' 7374 | print_ip_sym(preempt_disable_ip); | ^~~~~~~~~~~~ In file included from include/linux/ftrace.h:11, from include/linux/init_task.h:9, from kernel/sched/MuQSS.c:44: include/linux/kallsyms.h:169:20: note: declared here 169 | static inline void print_ip_sym(const char *loglvl, unsigned long ip) | ^~~~~~~~~~~~ kernel/sched/MuQSS.c: At top level: kernel/sched/MuQSS.c:7464:6: warning: no previous prototype for 'init_idle_bootup_task' [-Wmissing-prototypes] 7464 | void init_idle_bootup_task(struct task_struct *idle) | ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from include/asm-generic/percpu.h:7, from arch/sparc/include/asm/percpu_64.h:23, from arch/sparc/include/asm/percpu.h:5, from include/linux/percpu.h:13, from include/linux/hrtimer.h:19, from include/linux/sched.h:20, from include/linux/sched/signal.h:7, from include/linux/sched/cputime.h:5, from kernel/sched/MuQSS.h:7, from kernel/sched/sched.h:6, from kernel/sched/membarrier.c:7: kernel/sched/membarrier.c: In function 'ipi_sync_rq_state': 39 | this_cpu_write(runqueues.membarrier_state, | ^~~~~~~~~ include/linux/percpu-defs.h:219:47: note: in definition of macro '__verify_pcpu_ptr' 219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \ | ^~~ include/linux/percpu-defs.h:508:34: note: in expansion of macro '__pcpu_size_call' 508 | #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:39:2: note: in expansion of macro 'this_cpu_write' 39 | this_cpu_write(runqueues.membarrier_state, | ^~~~~~~~~~~~~~ kernel/sched/membarrier.c:39:17: note: each undeclared identifier is reported only once for each function it appears in 39 | this_cpu_write(runqueues.membarrier_state, | ^~~~~~~~~ include/linux/percpu-defs.h:219:47: note: in definition of macro '__verify_pcpu_ptr' 219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \ | ^~~ include/linux/percpu-defs.h:508:34: note: in expansion of macro '__pcpu_size_call' 508 | #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:39:2: note: in expansion of macro 'this_cpu_write' 39 | this_cpu_write(runqueues.membarrier_state, | ^~~~~~~~~~~~~~ kernel/sched/membarrier.c: In function 'membarrier_exec_mmap': kernel/sched/membarrier.c:63:17: error: 'runqueues' undeclared (first use in this function) 63 | this_cpu_write(runqueues.membarrier_state, 0); | ^~~~~~~~~ include/linux/percpu-defs.h:219:47: note: in definition of macro '__verify_pcpu_ptr' 219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \ | ^~~ include/linux/percpu-defs.h:508:34: note: in expansion of macro '__pcpu_size_call' 508 | #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:63:2: note: in expansion of macro 'this_cpu_write' 63 | this_cpu_write(runqueues.membarrier_state, 0); | ^~~~~~~~~~~~~~ kernel/sched/membarrier.c: In function 'sync_runqueues_membarrier_state': kernel/sched/membarrier.c:207:18: error: 'runqueues' undeclared (first use in this function) 207 | this_cpu_write(runqueues.membarrier_state, membarrier_state); | ^~~~~~~~~ include/linux/percpu-defs.h:219:47: note: in definition of macro '__verify_pcpu_ptr' 219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \ | ^~~ include/linux/percpu-defs.h:508:34: note: in expansion of macro '__pcpu_size_call' 508 | #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:207:3: note: in expansion of macro 'this_cpu_write' 207 | this_cpu_write(runqueues.membarrier_state, membarrier_state); | ^~~~~~~~~~~~~~ # https://github.com/zen-kernel/zen-kernel/commit/a7fe15e65f195714f080517f5... git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen-kernel-zen-kernel 5.8/muqss git checkout a7fe15e65f195714f080517f5a81303badc46dd9 vim +/schedule_user +4225 kernel/sched/MuQSS.c 4223 4224 #ifdef CONFIG_CONTEXT_TRACKING 4226 { 4227 /* 4228 * If we come here after a random call to set_need_resched(), 4229 * or we have been woken up remotely but the IPI has not yet arrived, 4230 * we haven't yet exited the RCU idle mode. Do it here manually until 4231 * we find a better solution. 4232 * 4233 * NB: There are buggy callers of this function. Ideally we 4234 * should warn if prev_state != IN_USER, but that will trigger 4235 * too frequently to make sense yet. 4236 */ 4237 enum ctx_state prev_state = exception_enter(); 4238 schedule(); 4239 exception_exit(prev_state); 4240 } 4241 #endif 4242 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org