linux-kernel - [PATCH 1/2] vfs: add d_real

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Message-Id: <1463777290-22881-2-git-send-email-mszeredi@redhat.com>
Date:	Fri, 20 May 2016 22:48:09 +0200
From:	Miklos Szeredi <mszeredi@...hat.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	David Howells <dhowells@...hat.com>
Subject: [PATCH 1/2] vfs: add d_real_inode() helper

Needed by the following fix.

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Cc: <stable@...r.kernel.org>
---
 include/linux/dcache.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 7e9422cb5989..ad5d582f9b14 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -576,5 +576,17 @@ static inline struct inode *vfs_select_inode(struct dentry *dentry,
 	return inode;
 }
 
+/**
+ * d_real_inode - Return the real inode
+ * @dentry: The dentry to query
+ *
+ * If dentry is on an union/overlay, then return the underlying, real inode.
+ * Otherwise return d_inode().
+ */
+static inline struct inode *d_real_inode(struct dentry *dentry)
+{
+	return d_backing_inode(d_real(dentry));
+}
+
 
 #endif	/* __LINUX_DCACHE_H */
-- 
2.5.5