cregit-Linux how code gets into the kernel

Release 4.15 kernel/sched/swait.c

Directory: kernel/sched
// SPDX-License-Identifier: GPL-2.0
#include <linux/sched/signal.h>
#include <linux/swait.h>


void __init_swait_queue_head(struct swait_queue_head *q, const char *name, struct lock_class_key *key) { raw_spin_lock_init(&q->lock); lockdep_set_class_and_name(&q->lock, key, name); INIT_LIST_HEAD(&q->task_list); }

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Peter Zijlstra48100.00%1100.00%
Total48100.00%1100.00%

EXPORT_SYMBOL(__init_swait_queue_head); /* * The thing about the wake_up_state() return value; I think we can ignore it. * * If for some reason it would return 0, that means the previously waiting * task is already running, so it will observe condition true (or has already). */
void swake_up_locked(struct swait_queue_head *q) { struct swait_queue *curr; if (list_empty(&q->task_list)) return; curr = list_first_entry(&q->task_list, typeof(*curr), task_list); wake_up_process(curr->task); list_del_init(&curr->task_list); }

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Peter Zijlstra59100.00%1100.00%
Total59100.00%1100.00%

EXPORT_SYMBOL(swake_up_locked);
void swake_up(struct swait_queue_head *q) { unsigned long flags; raw_spin_lock_irqsave(&q->lock, flags); swake_up_locked(q); raw_spin_unlock_irqrestore(&q->lock, flags); }

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Peter Zijlstra39100.00%1100.00%
Total39100.00%1100.00%

EXPORT_SYMBOL(swake_up); /* * Does not allow usage from IRQ disabled, since we must be able to * release IRQs to guarantee bounded hold time. */
void swake_up_all(struct swait_queue_head *q) { struct swait_queue *curr; LIST_HEAD(tmp); raw_spin_lock_irq(&q->lock); list_splice_init(&q->task_list, &tmp); while (!list_empty(&tmp)) { curr = list_first_entry(&tmp, typeof(*curr), task_list); wake_up_state(curr->task, TASK_NORMAL); list_del_init(&curr->task_list); if (list_empty(&tmp)) break; raw_spin_unlock_irq(&q->lock); raw_spin_lock_irq(&q->lock); } raw_spin_unlock_irq(&q->lock); }

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Peter Zijlstra116100.00%1100.00%
Total116100.00%1100.00%

EXPORT_SYMBOL(swake_up_all);
void __prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait) { wait->task = current; if (list_empty(&wait->task_list)) list_add(&wait->task_list, &q->task_list); }

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Peter Zijlstra44100.00%1100.00%
Total44100.00%1100.00%


void prepare_to_swait(struct swait_queue_head *q, struct swait_queue *wait, int state) { unsigned long flags; raw_spin_lock_irqsave(&q->lock, flags); __prepare_to_swait(q, wait); set_current_state(state); raw_spin_unlock_irqrestore(&q->lock, flags); }

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Peter Zijlstra54100.00%1100.00%
Total54100.00%1100.00%

EXPORT_SYMBOL(prepare_to_swait);
long prepare_to_swait_event(struct swait_queue_head *q, struct swait_queue *wait, int state) { if (signal_pending_state(state, current)) return -ERESTARTSYS; prepare_to_swait(q, wait, state); return 0; }

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Peter Zijlstra43100.00%1100.00%
Total43100.00%1100.00%

EXPORT_SYMBOL(prepare_to_swait_event);
void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait) { __set_current_state(TASK_RUNNING); if (!list_empty(&wait->task_list)) list_del_init(&wait->task_list); }

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Peter Zijlstra39100.00%1100.00%
Total39100.00%1100.00%


void finish_swait(struct swait_queue_head *q, struct swait_queue *wait) { unsigned long flags; __set_current_state(TASK_RUNNING); if (!list_empty_careful(&wait->task_list)) { raw_spin_lock_irqsave(&q->lock, flags); list_del_init(&wait->task_list); raw_spin_unlock_irqrestore(&q->lock, flags); } }

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Peter Zijlstra65100.00%1100.00%
Total65100.00%1100.00%

EXPORT_SYMBOL(finish_swait);

Overall Contributors

PersonTokensPropCommitsCommitProp
Peter Zijlstra54999.64%133.33%
Ingo Molnar10.18%133.33%
Greg Kroah-Hartman10.18%133.33%
Total551100.00%3100.00%
Directory: kernel/sched
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