tree 541e3f4ed4f2600ffe239e2f23341055199329b1
parent 09eeb1f5f4d9b52ab57820160dea6027bbea82a3
author jan Blunck <jblunck@suse.de> 1274910288 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1274976776 -0700

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>