tree 6a7fc68aea8f39f9df1139262ce7b98e44c73daa
parent 1427add02c90d60692e12ad88ade1e86c7444b38
author Heiko Carstens <heiko.carstens@de.ibm.com> 1357131683 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1357639026 +0100

s390/irq: enable irq sum accounting for /proc/stat again

For more than two years, since f2c66cd8eeddedb440f33bc0f5cec1ed7ae376cb
"/proc/stat: scalability of irq num per cpu" the output of /proc/stat is
broken.
The first field in the "intr" line should contain the sum of all interrupts,
however since the above mentioned change it is always zero.

The reason for that is that a per cpu irq sum variable had been introduced
which got incremented when calling kstat_incr_irqs_this_cpu(). However
on s390 we directly incremented only the per cpu per irq counter by accessing
the array element via kstat_cpu(smp_processor_id()).irqs[...].
So fix this and use the kstat_incr_irqs_this_cpu() wrapper which increments
both: the per cpu per irq counter and the per cpu irq sum counter.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>