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linux-sg2042
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Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6 

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] css: fix rsid evaluation for 2nd crw
  [S390] nohz/s390: fix arch_needs_cpu() return value on offline cpus
This commit is contained in:
Linus Torvalds 2010-12-07 08:04:08 -08:00
parent de47de7404 8d7bfb4a89
commit c2048b0a0a
2 changed files with 20 additions and 1 deletions
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19
arch/s390/kernel/vtime.c
View File

@ -19,6 +19,7 @@
#include <linux/kernel_stat.h>
#include <linux/rcupdate.h>
#include <linux/posix-timers.h>
#include <linux/cpu.h>
#include <asm/s390_ext.h>
#include <asm/timer.h>
@ -566,6 +567,23 @@ void init_cpu_vtimer(void)
__ctl_set_bit(0,10);
}
static int __cpuinit s390_nohz_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
struct s390_idle_data *idle;
long cpu = (long) hcpu;
idle = &per_cpu(s390_idle, cpu);
switch (action) {
case CPU_DYING:
case CPU_DYING_FROZEN:
idle->nohz_delay = 0;
default:
break;
}
return NOTIFY_OK;
}
void __init vtime_init(void)
{
/* request the cpu timer external interrupt */
@ -574,5 +592,6 @@ void __init vtime_init(void)
/* Enable cpu timer interrupts on the boot cpu. */
init_cpu_vtimer();
cpu_notifier(s390_nohz_notify, 0);
}

2
drivers/s390/cio/css.c
View File

@ -635,7 +635,7 @@ static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
init_subchannel_id(&mchk_schid);
mchk_schid.sch_no = crw0->rsid;
if (crw1)
mchk_schid.ssid = (crw1->rsid >> 8) & 3;
mchk_schid.ssid = (crw1->rsid >> 4) & 3;
/*
* Since we are always presented with IPI in the CRW, we have to