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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-01-02 14:01:23 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-01-08 10:57:06 +0100 |
| commit | add9bde216fefe1b65b41f7c0948cef48aa98c14 (patch) | |
| tree | 6a7fc68aea8f39f9df1139262ce7b98e44c73daa /drivers/s390 | |
| parent | s390/syscalls: wire up finit_module syscall (diff) | |
| download | linux-add9bde216fefe1b65b41f7c0948cef48aa98c14.tar.xz linux-add9bde216fefe1b65b41f7c0948cef48aa98c14.zip | |
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>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/cio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 8e927b9f285f..ebf61d5346f7 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -611,7 +611,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs) tpi_info = (struct tpi_info *)&S390_lowcore.subchannel_id; irb = (struct irb *)&S390_lowcore.irb; do { - kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++; + kstat_incr_irqs_this_cpu(IO_INTERRUPT, NULL); if (tpi_info->adapter_IO) { do_adapter_IO(tpi_info->isc); continue; |