From: Waiman Long <Waiman.Long@hp.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
Jeff Layton <jlayton@redhat.com>,
Miklos Szeredi <mszeredi@suse.cz>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <Waiman.Long@hp.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Andi Kleen <andi@firstfloor.org>,
"Chandramouleeswaran, Aswin" <aswin@hp.com>,
"Norton, Scott J" <scott.norton@hp.com>
Subject: [PATCH v6 03/14] dcache: Add a new helper function d_count() to return refcount
Date: Mon, 8 Jul 2013 21:09:53 -0400 [thread overview]
Message-ID: <1373332204-10379-4-git-send-email-Waiman.Long@hp.com> (raw)
In-Reply-To: <1373332204-10379-1-git-send-email-Waiman.Long@hp.com>
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@hp.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
next prev parent reply other threads:[~2013-07-09 1:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 1:09 [PATCH v6 00/14] Lockless update of reference count protected by spinlock Waiman Long
2013-07-09 1:09 ` [PATCH v6 01/14] spinlock: A new lockref structure for lockless update of refcount Waiman Long
2013-07-13 16:58 ` Masami Hiramatsu
2013-07-15 21:00 ` Waiman Long
2013-07-09 1:09 ` [PATCH v6 02/14] spinlock: Enable x86 architecture to do lockless refcount update Waiman Long
2013-07-09 1:09 ` Waiman Long [this message]
2013-07-11 13:48 ` [PATCH v6 03/14] dcache: Add a new helper function d_count() to return refcount Waiman Long
2013-07-09 1:09 ` [PATCH v6 04/14] auto-fs: replace direct access of d_count with the d_count() helper Waiman Long
2013-07-09 1:09 ` [PATCH v6 05/14] ceph-fs: " Waiman Long
2013-07-09 1:09 ` [PATCH v6 06/14] coda-fs: " Waiman Long
2013-07-09 1:09 ` Waiman Long
2013-07-09 1:09 ` [PATCH v6 07/14] config-fs: " Waiman Long
2013-07-09 1:09 ` [PATCH v6 08/14] ecrypt-fs: " Waiman Long
2013-07-09 1:09 ` [PATCH v6 09/14] file locking: " Waiman Long
2013-07-09 1:10 ` [PATCH v6 10/14] nfs: " Waiman Long
2013-07-09 1:10 ` [PATCH v6 11/14] nilfs2: " Waiman Long
2013-07-09 1:10 ` [PATCH v6 12/14] lustre-fs: Use the standard d_count() helper to access refcount Waiman Long
2013-07-10 9:47 ` Peng, Tao
2013-07-10 9:47 ` Peng, Tao
2013-07-09 1:10 ` [PATCH v6 13/14] dcache: rename d_count field of dentry to d_refcount Waiman Long
2013-07-09 1:10 ` [PATCH v6 14/14] dcache: Enable lockless update of refcount in dentry structure Waiman Long
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