From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 28 Oct 2008 02:51:53 +0000 (+0800)
Subject: tracepoint: introduce *_noupdate APIs.
X-Git-Tag: v2.6.29-rc1~586^2~102^5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=127cafbb276266b1b8da967bfe25a062ab1d42ab;p=pandora-kernel.git

tracepoint: introduce *_noupdate APIs.

Impact: add new tracepoint APIs to allow the batched registration of probes

new APIs separate tracepoint_probe_register(),
tracepoint_probe_unregister() into 2 steps. The first step of them
is just update tracepoint_entry, not connect or disconnect.

this patch introduces tracepoint_probe_update_all() for update all.

these APIs are very useful for registering lots of probes
but just updating once. Another very important thing is that
*_noupdate APIs do not require module_mutex.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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