new helper: ihold()
Clones an existing reference to inode; caller must already hold one.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/inode.c b/fs/inode.c
index 430d70f..05ea293 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -320,6 +320,15 @@
atomic_inc(&inode->i_count);
}
+/*
+ * get additional reference to inode; caller must already hold one.
+ */
+void ihold(struct inode *inode)
+{
+ WARN_ON(atomic_inc_return(&inode->i_count) < 2);
+}
+EXPORT_SYMBOL(ihold);
+
static void inode_lru_list_add(struct inode *inode)
{
if (list_empty(&inode->i_list)) {