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authorDeepthi Dharwar <deepthi@linux.vnet.ibm.com>2014-01-14 14:56:38 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-01-29 10:02:24 +0400
commit3fa8cad82b94d0bed002571bd246f2299ffc876b (patch)
tree3c85c1da6f6d78a8f96348df0e4d23a38256ebe9 /drivers/cpuidle/Makefile
parentbf7f61f2dfc5c5764e862bee317a5a227091d0d2 (diff)
downloadlinux-3fa8cad82b94d0bed002571bd246f2299ffc876b.tar.xz
powerpc/pseries/cpuidle: smt-snooze-delay cleanup.
smt-snooze-delay was designed to disable NAP state or delay the entry to the NAP state prior to adoption of cpuidle framework. This is per-cpu variable. With the coming of CPUIDLE framework, states can be disabled on per-cpu basis using the cpuidle/enable sysfs entry. Also, with the coming of cpuidle driver each state's target residency is per-driver unlike earlier which was per-device. Therefore, the per-cpu sysfs smt-snooze-delay which decides the target residency of the idle state on a particular cpu causes more confusion to the user as we cannot have different smt-snooze-delay (target residency) values for each cpu. In the current code, smt-snooze-delay functionality is completely broken. It makes sense to remove smt-snooze-delay from idle driver with the coming of cpuidle framework. However, sysfs files are retained as ppc64_util currently utilises it. Once we fix ppc64_util, propose to clean up the kernel code. Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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