From: Phillip Lougher <phillip@lougher.demon.co.uk>
Date: Tue, 26 Jul 2011 02:40:45 +0000 (+0100)
Subject: Documentation: Exporting: update description of d_splice_alias
X-Git-Tag: v3.1-rc1~147^2~12
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5b9f4567726513a359e70f85029482c7c3714dbd;p=profile%2Fivi%2Fkernel-x86-ivi.git

Documentation: Exporting: update description of d_splice_alias

Following commits a904937 and 0c1aa9a update the d_splice_alias
desciption.

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/Documentation/filesystems/nfs/Exporting b/Documentation/filesystems/nfs/Exporting
index 87019d2..09994c2 100644
--- a/Documentation/filesystems/nfs/Exporting
+++ b/Documentation/filesystems/nfs/Exporting
@@ -92,7 +92,14 @@ For a filesystem to be exportable it must:
    1/ provide the filehandle fragment routines described below.
    2/ make sure that d_splice_alias is used rather than d_add
       when ->lookup finds an inode for a given parent and name.
-      Typically the ->lookup routine will end with a:
+
+      If inode is NULL, d_splice_alias(inode, dentry) is eqivalent to
+
+		d_add(dentry, inode), NULL
+
+      Similarly, d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)
+
+      Typically the ->lookup routine will simply end with a:
 
 		return d_splice_alias(inode, dentry);
 	}