Hi Mark, [auto build test WARNING on tip/sched/core] [also build test WARNING on v4.5-rc6 next-20160301] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Mark-Rutland/sched-kasan-clear-stale-stack-poison/20160302-034556 config: sparc64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=sparc64 All warnings (new ones prefixed by >>): In file included from kernel/sched/core.c:29:0: include/linux/kasan.h:71:53: warning: 'struct task_struct' declared inside parameter list static inline void kasan_unpoison_task_stack(struct task_struct *idle) {} ^ include/linux/kasan.h:71:53: warning: its scope is only this definition or declaration, which is probably not what you want kernel/sched/core.c: In function 'init_idle': >> kernel/sched/core.c:5026:2: warning: passing argument 1 of >> 'kasan_unpoison_task_stack' from incompatible pointer type kasan_unpoison_task_stack(idle); ^ In file included from kernel/sched/core.c:29:0: include/linux/kasan.h:71:20: note: expected 'struct task_struct *' but argument is of type 'struct task_struct *' static inline void kasan_unpoison_task_stack(struct task_struct *idle) {} ^ vim +/kasan_unpoison_task_stack +5026 kernel/sched/core.c 5010 * 5011 * NOTE: this function does not set the idle thread's NEED_RESCHED 5012 * flag, to make booting more robust. 5013 */ 5014 void init_idle(struct task_struct *idle, int cpu) 5015 { 5016 struct rq *rq = cpu_rq(cpu); 5017 unsigned long flags; 5018 5019 raw_spin_lock_irqsave(&idle->pi_lock, flags); 5020 raw_spin_lock(&rq->lock); 5021 5022 __sched_fork(0, idle); 5023 idle->state = TASK_RUNNING; 5024 idle->se.exec_start = sched_clock(); 5025 > 5026 kasan_unpoison_task_stack(idle); 5027 5028 #ifdef CONFIG_SMP 5029 /* 5030 * Its possible that init_idle() gets called multiple times on a task, 5031 * in that case do_set_cpus_allowed() will not do the right thing. 5032 * 5033 * And since this is boot we can forgo the serialization. 5034 */ --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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