From: Oleg Nesterov <oleg@redhat.com>
Date: Thu, 31 Jan 2013 18:15:30 +0000 (+0100)
Subject: uprobes/tracing: Introduce is_trace_uprobe_enabled()
X-Git-Tag: v3.9-rc1~173^2~2^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b64b007797c1e6d6b745c93c296ba1d5f4d72d86;p=pandora-kernel.git

uprobes/tracing: Introduce is_trace_uprobe_enabled()

probe_event_enable/disable() check tu->consumer != NULL to avoid the
wrong uprobe_register/unregister().

We are going to kill this pointer and "struct uprobe_trace_consumer",
so we add the new helper, is_trace_uprobe_enabled(), which can rely
on TP_FLAG_TRACE/TP_FLAG_PROFILE instead.

Note: the current logic doesn't look optimal, it is not clear why
TP_FLAG_TRACE/TP_FLAG_PROFILE are mutually exclusive, we will probably
change this later.

Also kill the unused TP_FLAG_UPROBE.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
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