From: Knut Petersen <Knut_Petersen@t-online.de>
Date: Wed, 25 Sep 2013 12:29:37 +0000 (+0200)
Subject: perf: Enforce 1 as lower limit for perf_event_max_sample_rate
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~41^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=723478c8a471403c53cf144999701f6e0c4bbd11;p=pandora-kernel.git

perf: Enforce 1 as lower limit for perf_event_max_sample_rate

/proc/sys/kernel/perf_event_max_sample_rate will accept
negative values as well as 0.

Negative values are unreasonable, and 0 causes a
divide by zero exception in perf_proc_update_handler.

This patch enforces a lower limit of 1.

Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5242DB0C.4070005@t-online.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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