* [arm-de:tip/sched/core_20232906_proxy_exec_v4 11/12] kernel/sched/core.c:7178:35: sparse: sparse: incorrect type in argument 2 (different address spaces)
@ 2023-07-13 22:49 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-07-13 22:49 UTC (permalink / raw)
To: Peter Zijlstra
Cc: oe-kbuild-all, Dietmar Eggemann, Juri Lelli, Valentin Schneider,
Connor O'Brien, John Stultz
tree: https://git.gitlab.arm.com/linux-arm/linux-de.git tip/sched/core_20232906_proxy_exec_v4
head: 6a8f4ce70148c468ef287fc38700ed2217f94c43
commit: 77312af3338107c40b838680697cfb854bcf7326 [11/12] sched: Add proxy execution
config: um-randconfig-r083-20230713 (https://download.01.org/0day-ci/archive/20230714/202307140640.AcNREOA9-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230714/202307140640.AcNREOA9-lkp@intel.com/reproduce)
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/202307140640.AcNREOA9-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/sched/core.c:1044:38: 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:1044:38: sparse: expected struct task_struct *curr
kernel/sched/core.c:1044:38: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:2204:36: 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:2204:36: sparse: expected struct task_struct *curr
kernel/sched/core.c:2204:36: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:2215:64: 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:2215:64: sparse: expected struct task_struct *tsk
kernel/sched/core.c:2215:64: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:5790:36: 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:5790:36: sparse: expected struct task_struct *curr
kernel/sched/core.c:5790:36: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:7088:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *prev @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/core.c:7088:14: sparse: expected struct task_struct *prev
kernel/sched/core.c:7088:14: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/core.c:7178:35: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *prev @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/core.c:7178:35: sparse: expected struct task_struct *prev
kernel/sched/core.c:7178:35: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:7648:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/core.c:7648:17: sparse: struct task_struct *
kernel/sched/core.c:7648:17: sparse: struct task_struct [noderef] __rcu *
kernel/sched/core.c:7864:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/core.c:7864:22: sparse: struct task_struct [noderef] __rcu *
kernel/sched/core.c:7864:22: sparse: struct task_struct *
kernel/sched/core.c:12006:25: 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:12006:25: sparse: expected struct task_struct *p
kernel/sched/core.c:12006:25: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/core.c:552:6: sparse: sparse: context imbalance in 'raw_spin_rq_lock_nested' - wrong count at exit
kernel/sched/core.c:585:23: sparse: sparse: context imbalance in 'raw_spin_rq_trylock' - wrong count at exit
kernel/sched/core.c:601:6: sparse: sparse: context imbalance in 'raw_spin_rq_unlock' - unexpected unlock
kernel/sched/core.c:639:36: sparse: sparse: context imbalance in '__task_rq_lock' - wrong count at exit
kernel/sched/core.c:680:36: sparse: sparse: context imbalance in 'task_rq_lock' - wrong count at exit
kernel/sched/core.c: note: in included file:
kernel/sched/sched.h:2105:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2105:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2105:25: sparse: struct task_struct *
kernel/sched/sched.h:2105:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2105:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2105:25: sparse: struct task_struct *
kernel/sched/sched.h:2105:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2105:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2105:25: sparse: struct task_struct *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2293:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2293:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2295:18: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2293:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2295:18: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2293:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2293:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2295:18: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2293:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2293:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2295:18: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2293:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2293:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2293:9: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2295:18: sparse: struct task_struct *
kernel/sched/sched.h:2295:18: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2116:32: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2116:32: sparse: struct task_struct *
kernel/sched/sched.h:2105:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2105:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2105:25: sparse: struct task_struct *
vim +7178 kernel/sched/core.c
7036
7037 /*
7038 * __schedule() is the main scheduler function.
7039 *
7040 * The main means of driving the scheduler and thus entering this function are:
7041 *
7042 * 1. Explicit blocking: mutex, semaphore, waitqueue, etc.
7043 *
7044 * 2. TIF_NEED_RESCHED flag is checked on interrupt and userspace return
7045 * paths. For example, see arch/x86/entry_64.S.
7046 *
7047 * To drive preemption between tasks, the scheduler sets the flag in timer
7048 * interrupt handler scheduler_tick().
7049 *
7050 * 3. Wakeups don't really cause entry into schedule(). They add a
7051 * task to the run-queue and that's it.
7052 *
7053 * Now, if the new task added to the run-queue preempts the current
7054 * task, then the wakeup sets TIF_NEED_RESCHED and schedule() gets
7055 * called on the nearest possible occasion:
7056 *
7057 * - If the kernel is preemptible (CONFIG_PREEMPTION=y):
7058 *
7059 * - in syscall or exception context, at the next outmost
7060 * preempt_enable(). (this might be as soon as the wake_up()'s
7061 * spin_unlock()!)
7062 *
7063 * - in IRQ context, return from interrupt-handler to
7064 * preemptible context
7065 *
7066 * - If the kernel is not preemptible (CONFIG_PREEMPTION is not set)
7067 * then at the next:
7068 *
7069 * - cond_resched() call
7070 * - explicit schedule() call
7071 * - return from syscall or exception to user-space
7072 * - return from interrupt-handler to user-space
7073 *
7074 * WARNING: must be called with preemption disabled!
7075 */
7076 static void __sched notrace __schedule(unsigned int sched_mode)
7077 {
7078 struct task_struct *prev, *next;
7079 unsigned long *switch_count;
7080 unsigned long prev_state;
7081 struct rq_flags rf;
7082 struct rq *rq;
7083 int cpu;
7084 bool preserve_need_resched = false;
7085
7086 cpu = smp_processor_id();
7087 rq = cpu_rq(cpu);
7088 prev = rq->curr;
7089
7090 schedule_debug(prev, !!sched_mode);
7091
7092 if (sched_feat(HRTICK) || sched_feat(HRTICK_DL))
7093 hrtick_clear(rq);
7094
7095 local_irq_disable();
7096 rcu_note_context_switch(!!sched_mode);
7097
7098 /*
7099 * Make sure that signal_pending_state()->signal_pending() below
7100 * can't be reordered with __set_current_state(TASK_INTERRUPTIBLE)
7101 * done by the caller to avoid the race with signal_wake_up():
7102 *
7103 * __set_current_state(@state) signal_wake_up()
7104 * schedule() set_tsk_thread_flag(p, TIF_SIGPENDING)
7105 * wake_up_state(p, state)
7106 * LOCK rq->lock LOCK p->pi_state
7107 * smp_mb__after_spinlock() smp_mb__after_spinlock()
7108 * if (signal_pending_state()) if (p->state & @state)
7109 *
7110 * Also, the membarrier system call requires a full memory barrier
7111 * after coming from user-space, before storing to rq->curr.
7112 */
7113 rq_lock(rq, &rf);
7114 smp_mb__after_spinlock();
7115
7116 /* Promote REQ to ACT */
7117 rq->clock_update_flags <<= 1;
7118 update_rq_clock(rq);
7119
7120 switch_count = &prev->nivcsw;
7121
7122 /*
7123 * We must load prev->state once (task_struct::state is volatile), such
7124 * that we form a control dependency vs deactivate_task() below.
7125 */
7126 prev_state = READ_ONCE(prev->__state);
7127 if (!(sched_mode & SM_MASK_PREEMPT) && prev_state) {
7128 if (signal_pending_state(prev_state, prev)) {
7129 WRITE_ONCE(prev->__state, TASK_RUNNING);
7130 } else if (!task_is_blocked(prev)) {
7131 prev->sched_contributes_to_load =
7132 (prev_state & TASK_UNINTERRUPTIBLE) &&
7133 !(prev_state & TASK_NOLOAD) &&
7134 !(prev_state & TASK_FROZEN);
7135
7136 if (prev->sched_contributes_to_load)
7137 rq->nr_uninterruptible++;
7138
7139 /*
7140 * __schedule() ttwu()
7141 * prev_state = prev->state; if (p->on_rq && ...)
7142 * if (prev_state) goto out;
7143 * p->on_rq = 0; smp_acquire__after_ctrl_dep();
7144 * p->state = TASK_WAKING
7145 *
7146 * Where __schedule() and ttwu() have matching control dependencies.
7147 *
7148 * After this, schedule() must not care about p->state any more.
7149 */
7150 deactivate_task(rq, prev, DEQUEUE_SLEEP | DEQUEUE_NOCLOCK);
7151
7152 if (prev->in_iowait) {
7153 atomic_inc(&rq->nr_iowait);
7154 delayacct_blkio_start();
7155 }
7156 } else {
7157 /*
7158 * Let's make this task, which is blocked on
7159 * a mutex, (push/pull)able (RT/DL).
7160 * Unfortunately we can only deal with that by
7161 * means of a dequeue/enqueue cycle. :-/
7162 */
7163 dequeue_task(rq, prev, 0);
7164 enqueue_task(rq, prev, 0);
7165 }
7166 switch_count = &prev->nvcsw;
7167 }
7168
7169 pick_again:
7170 /*
7171 * If picked task is actually blocked it means that it can act as a
7172 * proxy for the task that is holding the mutex picked task is blocked
7173 * on. Get a reference to the blocked (going to be proxy) task here.
7174 * Note that if next isn't actually blocked we will have rq->proxy ==
7175 * rq->curr == next in the end, which is intended and means that proxy
7176 * execution is currently "not in use".
7177 */
> 7178 next = pick_next_task(rq, rq_selected(rq), &rf);
7179 rq_set_selected(rq, next);
7180 next->blocked_donor = NULL;
7181 if (unlikely(task_is_blocked(next))) {
7182 next = proxy(rq, next, &rf);
7183 if (!next) {
7184 __balance_callbacks(rq);
7185 goto pick_again;
7186 }
7187 if (next == rq->idle && prev == rq->idle)
7188 preserve_need_resched = true;
7189 }
7190
7191 if (!preserve_need_resched)
7192 clear_tsk_need_resched(prev);
7193 clear_preempt_need_resched();
7194 #ifdef CONFIG_SCHED_DEBUG
7195 rq->last_seen_need_resched_ns = 0;
7196 #endif
7197
7198 if (likely(prev != next)) {
7199 rq->nr_switches++;
7200 /*
7201 * RCU users of rcu_dereference(rq->curr) may not see
7202 * changes to task_struct made by pick_next_task().
7203 */
7204 RCU_INIT_POINTER(rq->curr, next);
7205 /*
7206 * The membarrier system call requires each architecture
7207 * to have a full memory barrier after updating
7208 * rq->curr, before returning to user-space.
7209 *
7210 * Here are the schemes providing that barrier on the
7211 * various architectures:
7212 * - mm ? switch_mm() : mmdrop() for x86, s390, sparc, PowerPC.
7213 * switch_mm() rely on membarrier_arch_switch_mm() on PowerPC.
7214 * - finish_lock_switch() for weakly-ordered
7215 * architectures where spin_unlock is a full barrier,
7216 * - switch_to() for arm64 (weakly-ordered, spin_unlock
7217 * is a RELEASE barrier),
7218 */
7219 ++*switch_count;
7220
7221 migrate_disable_switch(rq, prev);
7222 psi_sched_switch(prev, next, !task_on_rq_queued(prev));
7223
7224 trace_sched_switch(sched_mode & SM_MASK_PREEMPT, prev, next, prev_state);
7225
7226 /* Also unlocks the rq: */
7227 rq = context_switch(rq, prev, next, &rf);
7228 } else {
7229 rq->clock_update_flags &= ~(RQCF_ACT_SKIP|RQCF_REQ_SKIP);
7230
7231 rq_unpin_lock(rq, &rf);
7232 __balance_callbacks(rq);
7233 raw_spin_rq_unlock_irq(rq);
7234 }
7235 }
7236
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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