From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 23 Apr 2009 11:58:08 +0000 (+0200)
Subject: [S390] /proc/stat idle field for idle cpus
X-Git-Tag: v2.6.30-rc4~57^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1c805309d19c69d4ebeac38724076fa86feacdf;p=pandora-kernel.git

[S390] /proc/stat idle field for idle cpus

The cpu idle field in the output of /proc/stat is too small for cpus
that have been idle for more than a tick. Add the architecture hook
arch_idle_time that allows to add the not accounted idle time of a
sleeping cpu without waking the cpu.

The s390 implementation of arch_idle_time uses the already existing
s390_idle_data per_cpu variable to find the sleep time of a neighboring
idle cpu.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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