From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/kernel/sched/swait.c | 27 ++++++++++-----------------
1 files changed, 10 insertions(+), 17 deletions(-)
diff --git a/kernel/kernel/sched/swait.c b/kernel/kernel/sched/swait.c
index 119a56d..e1c655f 100644
--- a/kernel/kernel/sched/swait.c
+++ b/kernel/kernel/sched/swait.c
@@ -32,24 +32,18 @@
}
EXPORT_SYMBOL(swake_up_locked);
+/*
+ * Wake up all waiters. This is an interface which is solely exposed for
+ * completions and not for general usage.
+ *
+ * It is intentionally different from swake_up_all() to allow usage from
+ * hard interrupt context and interrupt disabled regions.
+ */
void swake_up_all_locked(struct swait_queue_head *q)
{
- struct swait_queue *curr;
- int wakes = 0;
-
- while (!list_empty(&q->task_list)) {
-
- curr = list_first_entry(&q->task_list, typeof(*curr),
- task_list);
- wake_up_process(curr->task);
- list_del_init(&curr->task_list);
- wakes++;
- }
- if (pm_in_action)
- return;
- WARN(wakes > 2, "complete_all() with %d waiters\n", wakes);
+ while (!list_empty(&q->task_list))
+ swake_up_locked(q);
}
-EXPORT_SYMBOL(swake_up_all_locked);
void swake_up_one(struct swait_queue_head *q)
{
@@ -70,7 +64,6 @@
struct swait_queue *curr;
LIST_HEAD(tmp);
- WARN_ON(irqs_disabled());
raw_spin_lock_irq(&q->lock);
list_splice_init(&q->task_list, &tmp);
while (!list_empty(&tmp)) {
@@ -113,7 +106,7 @@
long ret = 0;
raw_spin_lock_irqsave(&q->lock, flags);
- if (unlikely(signal_pending_state(state, current))) {
+ if (signal_pending_state(state, current)) {
/*
* See prepare_to_wait_event(). TL;DR, subsequent swake_up_one()
* must not see us.
--
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