linux-kernel - [PATCH v6 03/14] dcache: Add a new helper function d

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Date:	Mon,  8 Jul 2013 21:09:53 -0400
From:	Waiman Long <Waiman.Long@...com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	Jeff Layton <jlayton@...hat.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	Waiman Long <Waiman.Long@...com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Andi Kleen <andi@...stfloor.org>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>
Subject: [PATCH v6 03/14] dcache: Add a new helper function d_count() to return refcount

This patch adds a new helper function d_count() in dcache.h for
returning the current reference count of the dentry object. It
should be used by all the files outside of the core dcache.c and
namei.c files.

Signed-off-by: Waiman Long <Waiman.Long@...com>
---
 include/linux/dcache.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index f42dbe1..7c6bbf0 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -258,6 +258,16 @@ extern int have_submounts(struct dentry *);
 extern void d_rehash(struct dentry *);
 
 /**
+ * d_count - return the reference count in dentry
+ * @entry: dentry pointer
+ * Returns: current value of reference count
+ */
+static inline unsigned int d_count(struct dentry *entry)
+{
+	return entry->d_count;
+}
+
+/**
  * d_add - add dentry to hash queues
  * @entry: dentry to add
  * @inode: The inode to attach to this dentry
-- 
1.7.1

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