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/linux-5.19.10/kernel/rcu/
Dtree_stall.h30 int cpu_stall_timeout = READ_ONCE(rcu_exp_cpu_stall_timeout); in rcu_exp_jiffies_till_stall_check()
59 int till_stall_check = READ_ONCE(rcu_cpu_stall_timeout); in rcu_jiffies_till_stall_check()
103 return !time_before(j, READ_ONCE(rcu_state.gp_start) + d); in rcu_gp_might_be_stalled()
175 rcu_state.n_force_qs_gpstart = READ_ONCE(rcu_state.n_force_qs); in record_gp_stall_check_time()
194 if (!READ_ONCE(rcu_kick_kthreads)) in rcu_stall_kick_kthreads()
196 j = READ_ONCE(rcu_state.jiffies_kick_kthreads); in rcu_stall_kick_kthreads()
198 (rcu_gp_in_progress() || READ_ONCE(rcu_state.gp_flags))) { in rcu_stall_kick_kthreads()
403 unsigned long j = jiffies - READ_ONCE(rcu_state.gp_activity); in rcu_is_gp_kthread_starving()
412 unsigned long j = jiffies - READ_ONCE(rdp->rcuc_activity); in rcu_is_rcuc_kthread_starving()
505 data_race(READ_ONCE(rcu_state.gp_flags)), in rcu_check_gp_kthread_starvation()
[all …]
Dsync.c78 WARN_ON_ONCE(READ_ONCE(rsp->gp_state) == GP_IDLE); in rcu_sync_func()
79 WARN_ON_ONCE(READ_ONCE(rsp->gp_state) == GP_PASSED); in rcu_sync_func()
155 wait_event(rsp->gp_wait, READ_ONCE(rsp->gp_state) >= GP_PASSED); in rcu_sync_enter()
170 WARN_ON_ONCE(READ_ONCE(rsp->gp_state) == GP_IDLE); in rcu_sync_exit()
171 WARN_ON_ONCE(READ_ONCE(rsp->gp_count) == 0); in rcu_sync_exit()
193 WARN_ON_ONCE(READ_ONCE(rsp->gp_count)); in rcu_sync_dtor()
194 WARN_ON_ONCE(READ_ONCE(rsp->gp_state) == GP_PASSED); in rcu_sync_dtor()
Dsrcutiny.c99 int newval = READ_ONCE(ssp->srcu_lock_nesting[idx]) - 1; in __srcu_read_unlock()
102 if (!newval && READ_ONCE(ssp->srcu_gp_waiting) && in_task()) in __srcu_read_unlock()
120 if (ssp->srcu_gp_running || USHORT_CMP_GE(ssp->srcu_idx, READ_ONCE(ssp->srcu_idx_max))) in srcu_drive_gp()
133 swait_event_exclusive(ssp->srcu_wq, !READ_ONCE(ssp->srcu_lock_nesting[idx])); in srcu_drive_gp()
153 if (USHORT_CMP_LT(ssp->srcu_idx, READ_ONCE(ssp->srcu_idx_max))) in srcu_drive_gp()
163 if (USHORT_CMP_GE(READ_ONCE(ssp->srcu_idx_max), cookie)) in srcu_gp_start_if_needed()
166 if (!READ_ONCE(ssp->srcu_gp_running)) { in srcu_gp_start_if_needed()
216 ret = (READ_ONCE(ssp->srcu_idx) + 3) & ~0x1; in get_state_synchronize_srcu()
243 bool ret = USHORT_CMP_GE(READ_ONCE(ssp->srcu_idx), cookie); in poll_state_synchronize_srcu()
Drcu_segcblist.h15 return READ_ONCE(rclp->len); in rcu_cblist_n_cbs()
43 return !READ_ONCE(rsclp->head); in rcu_segcblist_empty()
52 return READ_ONCE(rsclp->len); in rcu_segcblist_n_cbs()
71 return READ_ONCE(rsclp->flags) & flags; in rcu_segcblist_test_flags()
112 return !READ_ONCE(*READ_ONCE(rsclp->tails[seg])); in rcu_segcblist_restempty()
Dtasks.h209 int j = READ_ONCE(i); // Prevent the compiler from reading twice in tasks_gp_state_getname()
288 ideal_cpu = smp_processor_id() >> READ_ONCE(rtp->percpu_enqueue_shift); in call_rcu_tasks_generic()
299 READ_ONCE(rtp->percpu_enqueue_lim) != nr_cpu_ids) in call_rcu_tasks_generic()
322 if (needwake && READ_ONCE(rtp->kthread_ptr)) in call_rcu_tasks_generic()
657 rtsi = READ_ONCE(rcu_task_stall_info); in rcu_tasks_wait_gp()
681 rtst = READ_ONCE(rcu_task_stall_timeout); in rcu_tasks_wait_gp()
784 if (t != current && READ_ONCE(t->on_rq) && !is_idle_task(t)) { in rcu_tasks_pertask()
786 t->rcu_tasks_nvcsw = READ_ONCE(t->nvcsw); in rcu_tasks_pertask()
811 if (!READ_ONCE(t->rcu_tasks_holdout) || in check_holdout_task()
812 t->rcu_tasks_nvcsw != READ_ONCE(t->nvcsw) || in check_holdout_task()
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Dtree_exp.h153 return READ_ONCE(rnp->exp_tasks) == NULL && in sync_rcu_exp_done()
154 READ_ONCE(rnp->expmask) == 0; in sync_rcu_exp_done()
287 if (ULONG_CMP_LT(READ_ONCE(rnp->exp_seq_rq), s) && in exp_funnel_lock()
289 ULONG_CMP_LT(READ_ONCE(rnp_root->exp_seq_rq), s)) && in exp_funnel_lock()
431 return !!READ_ONCE(rcu_exp_par_gp_kworker); in rcu_gp_par_worker_started()
481 return !!READ_ONCE(rcu_par_gp_wq); in rcu_gp_par_worker_started()
540 if (!READ_ONCE(rnp->expmask)) in sync_rcu_exp_select_cpus()
602 mask = READ_ONCE(rnp->expmask); in synchronize_rcu_expedited_wait()
614 j = READ_ONCE(jiffies_till_first_fqs); in synchronize_rcu_expedited_wait()
635 if (!(READ_ONCE(rnp->expmask) & mask)) in synchronize_rcu_expedited_wait()
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/linux-5.19.10/Documentation/translations/ko_KR/
Dmemory-barriers.txt259 Q = READ_ONCE(P); D = READ_ONCE(*Q);
266 READ_ONCE() 는 메모리 배리어 명령도 내게 되어 있어서, DEC Alpha CPU 는
271 DEC Alpha 에서 수행되든 아니든, READ_ONCE() 는 컴파일러로부터의 악영향
277 a = READ_ONCE(*X); WRITE_ONCE(*X, b);
285 WRITE_ONCE(*X, c); d = READ_ONCE(*X);
296 (*) 컴파일러가 READ_ONCE() 나 WRITE_ONCE() 로 보호되지 않은 메모리 액세스를
577 리눅스 커널 v4.15 기준으로, smp_mb() 가 DEC Alpha 용 READ_ONCE() 코드에
579 전용 코드를 만드는 사람들과 READ_ONCE() 자체를 만드는 사람들 뿐임을 의미합니다.
593 Q = READ_ONCE(P);
620 Q = READ_ONCE(P);
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/linux-5.19.10/include/net/
Dbusy_poll.h36 return READ_ONCE(sysctl_net_busy_poll); in net_busy_loop_on()
41 return READ_ONCE(sk->sk_ll_usec) && !signal_pending(current); in sk_can_busy_loop()
76 unsigned long bp_usec = READ_ONCE(sysctl_net_busy_poll); in busy_loop_timeout()
92 unsigned long bp_usec = READ_ONCE(sk->sk_ll_usec); in sk_busy_loop_timeout()
107 unsigned int napi_id = READ_ONCE(sk->sk_napi_id); in sk_busy_loop()
111 READ_ONCE(sk->sk_prefer_busy_poll), in sk_busy_loop()
112 READ_ONCE(sk->sk_busy_poll_budget) ?: BUSY_POLL_BUDGET); in sk_busy_loop()
133 if (unlikely(READ_ONCE(sk->sk_napi_id) != skb->napi_id)) in sk_mark_napi_id()
155 if (!READ_ONCE(sk->sk_napi_id)) in __sk_mark_napi_id_once()
/linux-5.19.10/arch/arm64/include/asm/
Dpreempt.h13 return READ_ONCE(current_thread_info()->preempt.count); in preempt_count()
47 u32 pc = READ_ONCE(current_thread_info()->preempt.count); in __preempt_count_add()
54 u32 pc = READ_ONCE(current_thread_info()->preempt.count); in __preempt_count_sub()
62 u64 pc = READ_ONCE(ti->preempt_count); in __preempt_count_dec_and_test()
74 return !pc || !READ_ONCE(ti->preempt_count); in __preempt_count_dec_and_test()
79 u64 pc = READ_ONCE(current_thread_info()->preempt_count); in should_resched()
/linux-5.19.10/arch/arm64/mm/
Dmmu.c165 pte_t old_pte = READ_ONCE(*ptep); in init_pte()
174 READ_ONCE(pte_val(*ptep)))); in init_pte()
189 pmd_t pmd = READ_ONCE(*pmdp); in alloc_init_cont_pte()
201 pmd = READ_ONCE(*pmdp); in alloc_init_cont_pte()
230 pmd_t old_pmd = READ_ONCE(*pmdp); in init_pmd()
244 READ_ONCE(pmd_val(*pmdp)))); in init_pmd()
250 pmd_val(old_pmd) != READ_ONCE(pmd_val(*pmdp))); in init_pmd()
264 pud_t pud = READ_ONCE(*pudp); in alloc_init_cont_pmd()
279 pud = READ_ONCE(*pudp); in alloc_init_cont_pmd()
307 p4d_t p4d = READ_ONCE(*p4dp); in alloc_init_pud()
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/linux-5.19.10/drivers/powercap/
Didle_inject.c114 duration_us = READ_ONCE(ii_dev->run_duration_us); in idle_inject_timer_fn()
115 duration_us += READ_ONCE(ii_dev->idle_duration_us); in idle_inject_timer_fn()
144 play_idle_precise(READ_ONCE(ii_dev->idle_duration_us) * NSEC_PER_USEC, in idle_inject_fn()
145 READ_ONCE(ii_dev->latency_us) * NSEC_PER_USEC); in idle_inject_fn()
172 *run_duration_us = READ_ONCE(ii_dev->run_duration_us); in idle_inject_get_duration()
173 *idle_duration_us = READ_ONCE(ii_dev->idle_duration_us); in idle_inject_get_duration()
198 unsigned int idle_duration_us = READ_ONCE(ii_dev->idle_duration_us); in idle_inject_start()
199 unsigned int run_duration_us = READ_ONCE(ii_dev->run_duration_us); in idle_inject_start()
/linux-5.19.10/arch/s390/lib/
Dspinlock.c131 old = READ_ONCE(lp->lock); in arch_spin_lock_queued()
168 while (READ_ONCE(node->prev) != NULL) { in arch_spin_lock_queued()
182 old = READ_ONCE(lp->lock); in arch_spin_lock_queued()
202 while ((next = READ_ONCE(node->next)) == NULL) in arch_spin_lock_queued()
218 owner = arch_spin_yield_target(READ_ONCE(lp->lock), NULL); in arch_spin_lock_classic()
258 owner = READ_ONCE(lp->lock); in arch_spin_trylock_retry()
272 while (READ_ONCE(rw->cnts) & 0x10000) in arch_read_lock_wait()
284 while (READ_ONCE(rw->cnts) & 0x10000) in arch_read_lock_wait()
301 old = READ_ONCE(rw->cnts); in arch_write_lock_wait()
317 cpu = READ_ONCE(lp->lock) & _Q_LOCK_CPU_MASK; in arch_spin_relax()
/linux-5.19.10/drivers/net/ethernet/mellanox/mlx4/
Den_port.c165 packets += READ_ONCE(ring->packets); in mlx4_en_fold_software_stats()
166 bytes += READ_ONCE(ring->bytes); in mlx4_en_fold_software_stats()
176 packets += READ_ONCE(ring->packets); in mlx4_en_fold_software_stats()
177 bytes += READ_ONCE(ring->bytes); in mlx4_en_fold_software_stats()
254 sw_rx_dropped += READ_ONCE(ring->dropped); in mlx4_en_DUMP_ETH_STATS()
255 priv->port_stats.rx_chksum_good += READ_ONCE(ring->csum_ok); in mlx4_en_DUMP_ETH_STATS()
256 priv->port_stats.rx_chksum_none += READ_ONCE(ring->csum_none); in mlx4_en_DUMP_ETH_STATS()
257 priv->port_stats.rx_chksum_complete += READ_ONCE(ring->csum_complete); in mlx4_en_DUMP_ETH_STATS()
258 priv->port_stats.rx_alloc_pages += READ_ONCE(ring->rx_alloc_pages); in mlx4_en_DUMP_ETH_STATS()
259 priv->xdp_stats.rx_xdp_drop += READ_ONCE(ring->xdp_drop); in mlx4_en_DUMP_ETH_STATS()
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/linux-5.19.10/include/linux/
Dsrcutiny.h63 idx = ((READ_ONCE(ssp->srcu_idx) + 1) & 0x2) >> 1; in __srcu_read_lock()
64 WRITE_ONCE(ssp->srcu_lock_nesting[idx], READ_ONCE(ssp->srcu_lock_nesting[idx]) + 1); in __srcu_read_lock()
84 idx = ((data_race(READ_ONCE(ssp->srcu_idx)) + 1) & 0x2) >> 1; in srcu_torture_stats_print()
87 data_race(READ_ONCE(ssp->srcu_lock_nesting[!idx])), in srcu_torture_stats_print()
88 data_race(READ_ONCE(ssp->srcu_lock_nesting[idx]))); in srcu_torture_stats_print()
/linux-5.19.10/arch/s390/kernel/
Didle.c81 idle_count = READ_ONCE(idle->idle_count); in show_idle_count()
82 if (READ_ONCE(idle->clock_idle_enter)) in show_idle_count()
98 idle_time = READ_ONCE(idle->idle_time); in show_idle_time()
99 idle_enter = READ_ONCE(idle->clock_idle_enter); in show_idle_time()
100 idle_exit = READ_ONCE(idle->clock_idle_exit); in show_idle_time()
124 idle_enter = READ_ONCE(idle->clock_idle_enter); in arch_cpu_idle_time()
125 idle_exit = READ_ONCE(idle->clock_idle_exit); in arch_cpu_idle_time()
/linux-5.19.10/arch/s390/include/asm/
Dpreempt.h17 return READ_ONCE(S390_lowcore.preempt_count) & ~PREEMPT_NEED_RESCHED; in preempt_count()
25 old = READ_ONCE(S390_lowcore.preempt_count); in preempt_count_set()
44 return !(READ_ONCE(S390_lowcore.preempt_count) & PREEMPT_NEED_RESCHED); in test_preempt_need_resched()
74 return unlikely(READ_ONCE(S390_lowcore.preempt_count) == in should_resched()
84 return READ_ONCE(S390_lowcore.preempt_count); in preempt_count()
/linux-5.19.10/kernel/cgroup/
Dmisc.c148 if (!(valid_type(type) && cg && READ_ONCE(misc_res_capacity[type]))) in misc_cg_try_charge()
158 if (new_usage > READ_ONCE(res->max) || in misc_cg_try_charge()
159 new_usage > READ_ONCE(misc_res_capacity[type])) { in misc_cg_try_charge()
215 if (READ_ONCE(misc_res_capacity[i])) { in misc_cg_max_show()
216 max = READ_ONCE(cg->res[i].max); in misc_cg_max_show()
281 if (READ_ONCE(misc_res_capacity[type])) in misc_cg_max_write()
305 if (READ_ONCE(misc_res_capacity[i]) || usage) in misc_cg_current_show()
328 cap = READ_ONCE(misc_res_capacity[i]); in misc_cg_capacity_show()
343 if (READ_ONCE(misc_res_capacity[i]) || events) in misc_events_show()
/linux-5.19.10/tools/memory-model/litmus-tests/
DSB+rfionceonce-poonceonces.litmus17 r1 = READ_ONCE(*x);
18 r2 = READ_ONCE(*y);
27 r3 = READ_ONCE(*y);
28 r4 = READ_ONCE(*x);
DISA2+poonceonces.litmus9 * of the smp_load_acquire() invocations are replaced by READ_ONCE()?
24 r0 = READ_ONCE(*y);
33 r0 = READ_ONCE(*z);
34 r1 = READ_ONCE(*x);
DIRIW+poonceonces+OnceOnce.litmus25 r0 = READ_ONCE(*x);
26 r1 = READ_ONCE(*y);
39 r0 = READ_ONCE(*y);
40 r1 = READ_ONCE(*x);
/linux-5.19.10/tools/memory-model/Documentation/
Dcontrol-dependencies.txt15 q = READ_ONCE(a);
17 p = READ_ONCE(b);
25 q = READ_ONCE(a);
28 p = READ_ONCE(b);
35 q = READ_ONCE(a);
40 of ordering. But please note that neither the READ_ONCE() nor the
41 WRITE_ONCE() are optional. Without the READ_ONCE(), the compiler might
55 So don't leave out either the READ_ONCE() or the WRITE_ONCE().
56 In particular, although READ_ONCE() does force the compiler to emit a
62 q = READ_ONCE(a);
[all …]
/linux-5.19.10/net/mptcp/
Dpm.c21 u8 add_addr = READ_ONCE(msk->pm.addr_signal); in mptcp_pm_announce_addr()
46 u8 rm_addr = READ_ONCE(msk->pm.addr_signal); in mptcp_pm_remove_addr()
96 subflows_max, READ_ONCE(pm->accept_subflow)); in mptcp_pm_allow_new_subflow()
99 if (!READ_ONCE(pm->accept_subflow)) in mptcp_pm_allow_new_subflow()
103 if (READ_ONCE(pm->accept_subflow)) { in mptcp_pm_allow_new_subflow()
142 if (READ_ONCE(pm->work_pending) && in mptcp_pm_fully_established()
167 if (!READ_ONCE(pm->work_pending)) in mptcp_pm_subflow_established()
172 if (READ_ONCE(pm->work_pending)) in mptcp_pm_subflow_established()
186 if (!READ_ONCE(pm->work_pending) && !update_subflows) in mptcp_pm_subflow_check_next()
210 READ_ONCE(pm->accept_addr)); in mptcp_pm_add_addr_received()
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/linux-5.19.10/tools/lib/perf/
Dmmap.c410 seq = READ_ONCE(pc->lock); in perf_mmap__read_self()
413 count->ena = READ_ONCE(pc->time_enabled); in perf_mmap__read_self()
414 count->run = READ_ONCE(pc->time_running); in perf_mmap__read_self()
418 time_mult = READ_ONCE(pc->time_mult); in perf_mmap__read_self()
419 time_shift = READ_ONCE(pc->time_shift); in perf_mmap__read_self()
420 time_offset = READ_ONCE(pc->time_offset); in perf_mmap__read_self()
423 time_cycles = READ_ONCE(pc->time_cycles); in perf_mmap__read_self()
424 time_mask = READ_ONCE(pc->time_mask); in perf_mmap__read_self()
428 idx = READ_ONCE(pc->index); in perf_mmap__read_self()
429 cnt = READ_ONCE(pc->offset); in perf_mmap__read_self()
[all …]
/linux-5.19.10/include/clocksource/
Dhyperv_timer.h60 sequence = READ_ONCE(tsc_pg->tsc_sequence); in hv_read_tsc_page_tsc()
69 scale = READ_ONCE(tsc_pg->tsc_scale); in hv_read_tsc_page_tsc()
70 offset = READ_ONCE(tsc_pg->tsc_offset); in hv_read_tsc_page_tsc()
79 } while (READ_ONCE(tsc_pg->tsc_sequence) != sequence); in hv_read_tsc_page_tsc()
/linux-5.19.10/kernel/locking/
Dqspinlock_paravirt.h121 return !READ_ONCE(lock->locked) && in trylock_clear_pending()
246 if (READ_ONCE(he->lock) == lock) { in pv_unhash()
247 node = READ_ONCE(he->node); in pv_unhash()
272 return READ_ONCE(prev->state) != vcpu_running; in pv_wait_early()
302 if (READ_ONCE(node->locked)) in pv_wait_node()
322 if (!READ_ONCE(node->locked)) { in pv_wait_node()
343 !READ_ONCE(node->locked)); in pv_wait_node()
414 if (READ_ONCE(pn->state) == vcpu_hashed) in pv_wait_head_or_lock()

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