X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=linux%2Fclosure.c;fp=linux%2Fclosure.c;h=0000000000000000000000000000000000000000;hb=f5baaf48e3e82b1caf9f5cd1207d4d6feba3a2e5;hp=c16540552d61bc14121b034a9d6e302045ff0dc5;hpb=fb35dbfdc5a9446fbb856dae5542b23963e28b89;p=bcachefs-tools-debian

diff --git a/linux/closure.c b/linux/closure.c
deleted file mode 100644
index c165405..0000000
--- a/linux/closure.c
+++ /dev/null
@@ -1,211 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Asynchronous refcounty things
- *
- * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
- * Copyright 2012 Google, Inc.
- */
-
-#include <linux/closure.h>
-#include <linux/debugfs.h>
-#include <linux/export.h>
-#include <linux/rcupdate.h>
-#include <linux/seq_file.h>
-#include <linux/sched/debug.h>
-
-static inline void closure_put_after_sub(struct closure *cl, int flags)
-{
-	int r = flags & CLOSURE_REMAINING_MASK;
-
-	BUG_ON(flags & CLOSURE_GUARD_MASK);
-	BUG_ON(!r && (flags & ~CLOSURE_DESTRUCTOR));
-
-	if (!r) {
-		smp_acquire__after_ctrl_dep();
-
-		cl->closure_get_happened = false;
-
-		if (cl->fn && !(flags & CLOSURE_DESTRUCTOR)) {
-			atomic_set(&cl->remaining,
-				   CLOSURE_REMAINING_INITIALIZER);
-			closure_queue(cl);
-		} else {
-			struct closure *parent = cl->parent;
-			closure_fn *destructor = cl->fn;
-
-			closure_debug_destroy(cl);
-
-			if (destructor)
-				destructor(&cl->work);
-
-			if (parent)
-				closure_put(parent);
-		}
-	}
-}
-
-/* For clearing flags with the same atomic op as a put */
-void closure_sub(struct closure *cl, int v)
-{
-	closure_put_after_sub(cl, atomic_sub_return_release(v, &cl->remaining));
-}
-EXPORT_SYMBOL(closure_sub);
-
-/*
- * closure_put - decrement a closure's refcount
- */
-void closure_put(struct closure *cl)
-{
-	closure_put_after_sub(cl, atomic_dec_return_release(&cl->remaining));
-}
-EXPORT_SYMBOL(closure_put);
-
-/*
- * closure_wake_up - wake up all closures on a wait list, without memory barrier
- */
-void __closure_wake_up(struct closure_waitlist *wait_list)
-{
-	struct llist_node *list;
-	struct closure *cl, *t;
-	struct llist_node *reverse = NULL;
-
-	list = llist_del_all(&wait_list->list);
-
-	/* We first reverse the list to preserve FIFO ordering and fairness */
-	reverse = llist_reverse_order(list);
-
-	/* Then do the wakeups */
-	llist_for_each_entry_safe(cl, t, reverse, list) {
-		closure_set_waiting(cl, 0);
-		closure_sub(cl, CLOSURE_WAITING + 1);
-	}
-}
-EXPORT_SYMBOL(__closure_wake_up);
-
-/**
- * closure_wait - add a closure to a waitlist
- * @waitlist: will own a ref on @cl, which will be released when
- * closure_wake_up() is called on @waitlist.
- * @cl: closure pointer.
- *
- */
-bool closure_wait(struct closure_waitlist *waitlist, struct closure *cl)
-{
-	if (atomic_read(&cl->remaining) & CLOSURE_WAITING)
-		return false;
-
-	cl->closure_get_happened = true;
-	closure_set_waiting(cl, _RET_IP_);
-	atomic_add(CLOSURE_WAITING + 1, &cl->remaining);
-	llist_add(&cl->list, &waitlist->list);
-
-	return true;
-}
-EXPORT_SYMBOL(closure_wait);
-
-struct closure_syncer {
-	struct task_struct	*task;
-	int			done;
-};
-
-static CLOSURE_CALLBACK(closure_sync_fn)
-{
-	struct closure *cl = container_of(ws, struct closure, work);
-	struct closure_syncer *s = cl->s;
-	struct task_struct *p;
-
-	rcu_read_lock();
-	p = READ_ONCE(s->task);
-	s->done = 1;
-	wake_up_process(p);
-	rcu_read_unlock();
-}
-
-void __sched __closure_sync(struct closure *cl)
-{
-	struct closure_syncer s = { .task = current };
-
-	cl->s = &s;
-	continue_at(cl, closure_sync_fn, NULL);
-
-	while (1) {
-		set_current_state(TASK_UNINTERRUPTIBLE);
-		if (s.done)
-			break;
-		schedule();
-	}
-
-	__set_current_state(TASK_RUNNING);
-}
-EXPORT_SYMBOL(__closure_sync);
-
-#ifdef CONFIG_DEBUG_CLOSURES
-
-static LIST_HEAD(closure_list);
-static DEFINE_SPINLOCK(closure_list_lock);
-
-void closure_debug_create(struct closure *cl)
-{
-	unsigned long flags;
-
-	BUG_ON(cl->magic == CLOSURE_MAGIC_ALIVE);
-	cl->magic = CLOSURE_MAGIC_ALIVE;
-
-	spin_lock_irqsave(&closure_list_lock, flags);
-	list_add(&cl->all, &closure_list);
-	spin_unlock_irqrestore(&closure_list_lock, flags);
-}
-EXPORT_SYMBOL(closure_debug_create);
-
-void closure_debug_destroy(struct closure *cl)
-{
-	unsigned long flags;
-
-	BUG_ON(cl->magic != CLOSURE_MAGIC_ALIVE);
-	cl->magic = CLOSURE_MAGIC_DEAD;
-
-	spin_lock_irqsave(&closure_list_lock, flags);
-	list_del(&cl->all);
-	spin_unlock_irqrestore(&closure_list_lock, flags);
-}
-EXPORT_SYMBOL(closure_debug_destroy);
-
-static int debug_show(struct seq_file *f, void *data)
-{
-	struct closure *cl;
-
-	spin_lock_irq(&closure_list_lock);
-
-	list_for_each_entry(cl, &closure_list, all) {
-		int r = atomic_read(&cl->remaining);
-
-		seq_printf(f, "%p: %pS -> %pS p %p r %i ",
-			   cl, (void *) cl->ip, cl->fn, cl->parent,
-			   r & CLOSURE_REMAINING_MASK);
-
-		seq_printf(f, "%s%s\n",
-			   test_bit(WORK_STRUCT_PENDING_BIT,
-				    work_data_bits(&cl->work)) ? "Q" : "",
-			   r & CLOSURE_RUNNING	? "R" : "");
-
-		if (r & CLOSURE_WAITING)
-			seq_printf(f, " W %pS\n",
-				   (void *) cl->waiting_on);
-
-		seq_puts(f, "\n");
-	}
-
-	spin_unlock_irq(&closure_list_lock);
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(debug);
-
-static int __init closure_debug_init(void)
-{
-	debugfs_create_file("closures", 0400, NULL, NULL, &debug_fops);
-	return 0;
-}
-late_initcall(closure_debug_init)
-
-#endif