From 8b0c250be489dcbf1a3a33bb4ec4c7f33735a365 Mon Sep 17 00:00:00 2001
From: "mochel@digitalimplant.org" <mochel@digitalimplant.org>
Date: Thu, 24 Mar 2005 12:58:57 -0800
Subject: [PATCH] [PATCH] add klist_node_attached() to determine if a node is
on a list or not.
Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff -Nru a/include/linux/klist.h b/include/linux/klist.h
---
include/linux/klist.h | 2 ++
lib/klist.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/include/linux/klist.h b/include/linux/klist.h
index fb52f9d9d61105..eebf5e5696ec3b 100644
--- a/include/linux/klist.h
+++ b/include/linux/klist.h
@@ -37,6 +37,8 @@ extern void klist_add_head(struct klist * k, struct klist_node * n);
extern void klist_del(struct klist_node * n);
extern void klist_remove(struct klist_node * n);
+extern int klist_node_attached(struct klist_node * n);
+
struct klist_iter {
struct klist * i_klist;
diff --git a/lib/klist.c b/lib/klist.c
index 6f760424648bf3..02177d72dc8923 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -112,6 +112,7 @@ static void klist_release(struct kref * kref)
struct klist_node * n = container_of(kref, struct klist_node, n_ref);
list_del(&n->n_node);
complete(&n->n_removed);
+ n->n_klist = NULL;
}
static int klist_dec_and_del(struct klist_node * n)
@@ -153,6 +154,19 @@ void klist_remove(struct klist_node * n)
EXPORT_SYMBOL_GPL(klist_remove);
+/**
+ * klist_node_attached - Say whether a node is bound to a list or not.
+ * @n: Node that we're testing.
+ */
+
+int klist_node_attached(struct klist_node * n)
+{
+ return (n->n_klist != NULL);
+}
+
+EXPORT_SYMBOL_GPL(klist_node_attached);
+
+
/**
* klist_iter_init_node - Initialize a klist_iter structure.
* @k: klist we're iterating.
@@ -246,3 +260,5 @@ struct klist_node * klist_next(struct klist_iter * i)
}
EXPORT_SYMBOL_GPL(klist_next);
+
+
--
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