From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Tue, 20 Nov 2012 12:16:47 +0000 (+0000)
Subject: drm: Add a hash-tab rcu-safe API
X-Git-Tag: v3.8-rc1~82^2~137
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=384cc2f9688994dfd505011ba3b08e0a702030b0;p=pandora-kernel.git

drm: Add a hash-tab rcu-safe API

While hashtab should now be RCU-safe, Add a drm_ht_xxx_api for consumers
to use to make it obvious what locking mechanism is used.

Document the way the rcu-safe interface should be used.

Don't use rcu-safe list traversal in modify operations where we should use
a spinlock / mutex anyway.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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