From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 27 Jun 2014 17:01:40 +0000 (+0200)
Subject: uprobes: Change unregister/apply to WARN() if uprobe/consumer is gone
X-Git-Tag: omap-for-v3.16/fixes-rc4~23^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06d0713904e508f765e0d7146c14b67bbd248fe7;p=pandora-kernel.git

uprobes: Change unregister/apply to WARN() if uprobe/consumer is gone

Add WARN_ON's into uprobe_unregister() and uprobe_apply() to ensure
that nobody tries to play with the dead uprobe/consumer. This helps
to catch the bugs like the one fixed by the previous patch.

In the longer term we should fix this poorly designed interface.
uprobe_register() should return "struct uprobe *" which should be
passed to apply/unregister. Plus other semantic changes, see the
changelog in commit 41ccba029e94.

Link: http://lkml.kernel.org/p/20140627170140.GA18322@redhat.com

Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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