From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Fri, 21 Sep 2012 17:41:50 +0000 (-0700)
Subject: rcu: Fix CONFIG_RCU_FAST_NO_HZ stall warning message
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~101^2~1^2~2^3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86f343b50bb9f56cce60fade22da9defff28934c;p=pandora-kernel.git

rcu: Fix CONFIG_RCU_FAST_NO_HZ stall warning message

The print_cpu_stall_fast_no_hz() function attempts to print -1 when
the ->idle_gp_timer is not pending, but unsigned arithmetic causes it
to instead print ULONG_MAX, which is 4294967295 on 32-bit systems and
18446744073709551615 on 64-bit systems.  Neither of these are the most
reader-friendly values, so this commit instead causes "timer not pending"
to be printed when ->idle_gp_timer is not pending.

Reported-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

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