linux-kernel - [PATCH] Documentation: Exporting: update description of d_splice

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Message-ID: <4e2e292d.simGZB2oLp++vx9O%phillip@lougher.demon.co.uk>
Date:	Tue, 26 Jul 2011 03:40:45 +0100
From:	Phillip Lougher <phillip@...gher.demon.co.uk>
To:	viro@...iv.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] 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@...ashfs.org.uk>
---
 Documentation/filesystems/nfs/Exporting |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

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);
 	}
-- 
1.7.1

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