Rafael J. Wysocki 6dbf5cea05 cpuidle: menu: Avoid taking spinlock for accessing QoS values ... After commit 9908859aca (cpuidle/menu: add per CPU PM QoS resume latency consideration) the cpuidle menu governor calls dev_pm_qos_read_value() on CPU devices to read the current resume latency QoS constraint values for them. That function takes a spinlock to prevent the device's power.qos pointer from becoming NULL during the access which is a problem for the RT patchset where spinlocks are converted into mutexes and the idle loop stops working. However, it is not even necessary for the menu governor to take that spinlock, because the power.qos pointer accessed under it cannot be modified during the access anyway. For this reason, introduce a "raw" routine for accessing device QoS resume latency constraints without locking and use it in the menu governor. Fixes: 9908859aca (cpuidle/menu: add per CPU PM QoS resume latency consideration) Acked-by: Alex Shi <alex.shi@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2017-02-27 15:07:38 +01:00
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ladder.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
Makefile	cpuidle: consolidate 2.6.22 cpuidle branch into one patch	2007-10-10 00:12:41 -04:00
menu.c	cpuidle: menu: Avoid taking spinlock for accessing QoS values	2017-02-27 15:07:38 +01:00