tree 73886783aac7c489a29f3e5eec56cbc2371a12dd
parent b1ad171efa089ae26aba750d747d8149a4f860d5
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1240487888 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1240487897 +0200

[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>