From: Deepthi Dharwar Date: Wed, 3 Oct 2012 18:42:18 +0000 (+0000) Subject: cpuidle/powerpc: Fix smt_snooze_delay functionality. X-Git-Tag: v3.7-rc2~28^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ea959a17fe6e27f7954dddad5b17b0e33f0d7ee;p=pandora-kernel.git cpuidle/powerpc: Fix smt_snooze_delay functionality. smt_snooze_delay was designed to delay idle loop's nap entry in the native idle code before it got ported over to use as part of the cpuidle framework. A -ve value assigned to smt_snooze_delay should result in busy looping, in other words disabling the entry to nap state. - https://lists.ozlabs.org/pipermail/linuxppc-dev/2010-May/082450.html This particular functionality can be achieved currently by echo 1 > /sys/devices/system/cpu/cpu*/state1/disable but it is broken when one assigns -ve value to the smt_snooze_delay variable either via sysfs entry or ppc64_cpu util. This patch aims to fix this, by disabling nap state when smt_snooze_delay variable is set to -ve value. Signed-off-by: Deepthi Dharwar Signed-off-by: Benjamin Herrenschmidt --- Reading git-diff-tree failed