[PATCH 4.6 100/203] vfs: add d_real_inode() helper

Greg Kroah-Hartman
2016-07-25T21:33:52Z

From: Miklos Szeredi <mszeredi@redhat.com>

commit a118084432d642eeccb961c7c8cc61525a941fcb upstream.

Needed by the following fix.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
include/linux/dcache.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -576,5 +576,17 @@ static inline struct inode *vfs_select_i
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 */