From ae6afc3f5cf53fb97bac2d0a209bb465952742e7 Mon Sep 17 00:00:00 2001
From: jan Blunck <jblunck@suse.de>
Date: Wed, 26 May 2010 14:44:48 -0700
Subject: [PATCH] vfs: introduce noop_llseek()

This is an implementation of ->llseek useable for the rare special case
when userspace expects the seek to succeed but the (device) file is
actually not able to perform the seek.  In this case you use noop_llseek()
instead of falling back to the default implementation of ->llseek.

Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
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