From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Date: Fri, 30 Oct 2009 13:53:10 +0000 (+0530)
Subject: kprobes: Sanitize struct kretprobe_instance allocations
X-Git-Tag: v2.6.33-rc1~400^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dae560f97fa438f373b53e14b30149c9e44a600;p=pandora-kernel.git

kprobes: Sanitize struct kretprobe_instance allocations

For as long as kretprobes have existed, we've allocated NR_CPUS
instances of kretprobe_instance structures. With the default
value of CONFIG_NR_CPUS increasing on certain architectures, we
are potentially wasting kernel memory.

See http://sourceware.org/bugzilla/show_bug.cgi?id=10839#c3 for
more details.

Use a saner num_possible_cpus() instead of NR_CPUS for
allocation.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: fweisbec@gmail.com
LKML-Reference: <20091030135310.GA22230@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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