tree: https://android.googlesource.com/kernel/common android-mainline head: 9a81ce5c7163581153905c037693a7e17df4888b commit: 6b0a9dc6df8d8be21c8d178a01e0711b0fe6ce73 [4/6] ANDROID: GKI: core: Export for runqueues config: x86_64-randconfig-s022-20200812 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty git checkout 6b0a9dc6df8d8be21c8d178a01e0711b0fe6ce73 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/sched/core.c:192:21: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:192:21: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:192:21: sparse: got struct rq * kernel/sched/core.c:214:22: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:214:22: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:214:22: sparse: got struct rq * kernel/sched/core.c:233:21: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:233:21: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:233:21: sparse: got struct rq * kernel/sched/core.c:613:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:613:38: sparse: expected struct task_struct *curr kernel/sched/core.c:613:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:637:25: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:637:25: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:637:25: sparse: got struct rq * kernel/sched/core.c:1706:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:1706:33: sparse: expected struct task_struct *p kernel/sched/core.c:1706:33: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:1706:68: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:1706:68: sparse: expected struct task_struct *tsk kernel/sched/core.c:1706:68: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:1756:14: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:1756:14: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:1756:14: sparse: got struct rq * kernel/sched/core.c:1802:25: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:1802:25: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:1802:25: sparse: got struct rq * kernel/sched/core.c:1824:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:1824:13: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:1824:13: sparse: got struct rq * kernel/sched/core.c:1849:25: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:1849:25: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:1849:25: sparse: got struct rq * kernel/sched/core.c:2028:26: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2028:26: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2028:26: sparse: got struct rq * kernel/sched/core.c:2029:26: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2029:26: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2029:26: sparse: got struct rq * kernel/sched/core.c:2066:18: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2066:18: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2066:18: sparse: got struct rq * kernel/sched/core.c:2067:18: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2067:18: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2067:18: sparse: got struct rq * kernel/sched/core.c:2168:22: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2168:22: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2168:22: sparse: got struct rq * kernel/sched/core.c:2398:40: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2398:40: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2398:40: sparse: got struct rq * kernel/sched/core.c:2414:9: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2414:9: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2414:9: sparse: got struct rq * kernel/sched/core.c:2443:14: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2443:14: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2443:14: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * kernel/sched/core.c:2454:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct rq * @@ kernel/sched/core.c:2454:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/sched/core.c:2454:17: sparse: got struct rq * vim +190 kernel/sched/core.c fa85ae2418e684 kernel/sched.c Peter Zijlstra 2008-01-25 84 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 85 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 86 /* 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 87 * Serialization rules: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 88 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 89 * Lock order: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 90 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 91 * p->pi_lock 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 92 * rq->lock 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 93 * hrtimer_cpu_base->lock (hrtimer_start() for bandwidth controls) 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 94 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 95 * rq1->lock 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 96 * rq2->lock where: rq1 < rq2 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 97 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 98 * Regular state: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 99 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 100 * Normal scheduling state is serialized by rq->lock. __schedule() takes the 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 101 * local CPU's rq->lock, it optionally removes the task from the runqueue and 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 102 * always looks at the local rq data structures to find the most elegible task 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 103 * to run next. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 104 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 105 * Task enqueue is also under rq->lock, possibly taken from another CPU. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 106 * Wakeups from another LLC domain might use an IPI to transfer the enqueue to 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 107 * the local CPU to avoid bouncing the runqueue state around [ see 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 108 * ttwu_queue_wakelist() ] 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 109 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 110 * Task wakeup, specifically wakeups that involve migration, are horribly 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 111 * complicated to avoid having to take two rq->locks. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 112 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 113 * Special state: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 114 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 115 * System-calls and anything external will use task_rq_lock() which acquires 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 116 * both p->pi_lock and rq->lock. As a consequence the state they change is 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 117 * stable while holding either lock: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 118 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 119 * - sched_setaffinity()/ 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 120 * set_cpus_allowed_ptr(): p->cpus_ptr, p->nr_cpus_allowed 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 121 * - set_user_nice(): p->se.load, p->*prio 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 122 * - __sched_setscheduler(): p->sched_class, p->policy, p->*prio, 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 123 * p->se.load, p->rt_priority, 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 124 * p->dl.dl_{runtime, deadline, period, flags, bw, density} 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 125 * - sched_setnuma(): p->numa_preferred_nid 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 126 * - sched_move_task()/ 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 127 * cpu_cgroup_fork(): p->sched_task_group 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 128 * - uclamp_update_active() p->uclamp* 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 129 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 130 * p->state <- TASK_*: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 131 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 132 * is changed locklessly using set_current_state(), __set_current_state() or 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 133 * set_special_state(), see their respective comments, or by 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 134 * try_to_wake_up(). This latter uses p->pi_lock to serialize against 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 135 * concurrent self. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 136 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 137 * p->on_rq <- { 0, 1 = TASK_ON_RQ_QUEUED, 2 = TASK_ON_RQ_MIGRATING }: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 138 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 139 * is set by activate_task() and cleared by deactivate_task(), under 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 140 * rq->lock. Non-zero indicates the task is runnable, the special 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 141 * ON_RQ_MIGRATING state is used for migration without holding both 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 142 * rq->locks. It indicates task_cpu() is not stable, see task_rq_lock(). 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 143 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 144 * p->on_cpu <- { 0, 1 }: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 145 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 146 * is set by prepare_task() and cleared by finish_task() such that it will be 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 147 * set before p is scheduled-in and cleared after p is scheduled-out, both 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 148 * under rq->lock. Non-zero indicates the task is running on its CPU. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 149 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 150 * [ The astute reader will observe that it is possible for two tasks on one 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 151 * CPU to have ->on_cpu = 1 at the same time. ] 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 152 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 153 * task_cpu(p): is changed by set_task_cpu(), the rules are: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 154 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 155 * - Don't call set_task_cpu() on a blocked task: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 156 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 157 * We don't care what CPU we're not running on, this simplifies hotplug, 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 158 * the CPU assignment of blocked tasks isn't required to be valid. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 159 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 160 * - for try_to_wake_up(), called under p->pi_lock: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 161 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 162 * This allows try_to_wake_up() to only take one rq->lock, see its comment. 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 163 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 164 * - for migration called under rq->lock: 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 165 * [ see task_on_rq_migrating() in task_rq_lock() ] 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 166 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 167 * o move_queued_task() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 168 * o detach_task() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 169 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 170 * - for migration called under double_rq_lock(): 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 171 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 172 * o __migrate_swap_task() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 173 * o push_rt_task() / pull_rt_task() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 174 * o push_dl_task() / pull_dl_task() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 175 * o dl_task_offline_migration() 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 176 * 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 177 */ 58877d347b58c9 kernel/sched/core.c Peter Zijlstra 2020-07-02 178 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 179 /* 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 180 * __task_rq_lock - lock the rq @p resides on. 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 181 */ eb58075149b7f0 kernel/sched/core.c Peter Zijlstra 2015-07-31 182 struct rq *__task_rq_lock(struct task_struct *p, struct rq_flags *rf) 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 183 __acquires(rq->lock) 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 184 { 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 185 struct rq *rq; 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 186 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 187 lockdep_assert_held(&p->pi_lock); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 188 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 189 for (;;) { 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 @190 rq = task_rq(p); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 191 raw_spin_lock(&rq->lock); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 192 if (likely(rq == task_rq(p) && !task_on_rq_migrating(p))) { d8ac897137a230 kernel/sched/core.c Matt Fleming 2016-09-21 193 rq_pin_lock(rq, rf); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 194 return rq; 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 195 } 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 196 raw_spin_unlock(&rq->lock); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 197 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 198 while (unlikely(task_on_rq_migrating(p))) 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 199 cpu_relax(); 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 200 } 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 201 } 3e71a462dd483c kernel/sched/core.c Peter Zijlstra 2016-04-28 202 :::::: The code at line 190 was first introduced by commit :::::: 3e71a462dd483ce508a723356b293731e7d788ea sched/core: Move task_rq_lock() out of line :::::: TO: Peter Zijlstra <peterz(a)infradead.org&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org