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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/md/bcache/closure.c
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@@ -45,7 +45,6 @@
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 {
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 	closure_put_after_sub(cl, atomic_sub_return(v, &cl->remaining));
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 }
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-EXPORT_SYMBOL(closure_sub);
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 /*
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  * closure_put - decrement a closure's refcount
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@@ -54,7 +53,6 @@
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 {
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 	closure_put_after_sub(cl, atomic_dec_return(&cl->remaining));
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 }
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-EXPORT_SYMBOL(closure_put);
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 /*
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  * closure_wake_up - wake up all closures on a wait list, without memory barrier
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@@ -76,7 +74,6 @@
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 		closure_sub(cl, CLOSURE_WAITING + 1);
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 	}
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 }
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-EXPORT_SYMBOL(__closure_wake_up);
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 /**
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  * closure_wait - add a closure to a waitlist
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@@ -96,7 +93,6 @@
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 	return true;
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 }
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-EXPORT_SYMBOL(closure_wait);
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 struct closure_syncer {
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 	struct task_struct	*task;
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@@ -131,7 +127,6 @@
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 	__set_current_state(TASK_RUNNING);
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 }
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-EXPORT_SYMBOL(__closure_sync);
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 #ifdef CONFIG_BCACHE_CLOSURES_DEBUG
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@@ -149,7 +144,6 @@
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 	list_add(&cl->all, &closure_list);
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 	spin_unlock_irqrestore(&closure_list_lock, flags);
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 }
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-EXPORT_SYMBOL(closure_debug_create);
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 void closure_debug_destroy(struct closure *cl)
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 {
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@@ -162,11 +156,10 @@
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 	list_del(&cl->all);
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 	spin_unlock_irqrestore(&closure_list_lock, flags);
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 }
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-EXPORT_SYMBOL(closure_debug_destroy);
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 static struct dentry *closure_debug;
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-static int debug_seq_show(struct seq_file *f, void *data)
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+static int debug_show(struct seq_file *f, void *data)
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 {
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 	struct closure *cl;
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@@ -195,17 +188,7 @@
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 	return 0;
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 }
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-static int debug_seq_open(struct inode *inode, struct file *file)
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-{
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-	return single_open(file, debug_seq_show, NULL);
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-}
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-
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-static const struct file_operations debug_ops = {
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-	.owner		= THIS_MODULE,
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-	.open		= debug_seq_open,
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-	.read		= seq_read,
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-	.release	= single_release
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-};
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+DEFINE_SHOW_ATTRIBUTE(debug);
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 void  __init closure_debug_init(void)
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 {
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@@ -216,7 +199,7 @@
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 		 * about this.
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 		 */
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 		closure_debug = debugfs_create_file(
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-			"closures", 0400, bcache_debug, NULL, &debug_ops);
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+			"closures", 0400, bcache_debug, NULL, &debug_fops);
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 }
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 #endif
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