From: David Howells <dhowells@redhat.com>
Date: Fri, 3 Apr 2009 15:42:39 +0000 (+0100)
Subject: CacheFiles: Permit the page lock state to be monitored
X-Git-Tag: v2.6.30-rc1~229^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=385e1ca5f21c4680ad6a46a3aa2ea8af99e99c92;p=pandora-kernel.git

CacheFiles: Permit the page lock state to be monitored

Add a function to install a monitor on the page lock waitqueue for a particular
page, thus allowing the page being unlocked to be detected.

This is used by CacheFiles to detect read completion on a page in the backing
filesystem so that it can then copy the data to the waiting netfs page.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
---

Reading git-diff-tree failed