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authorLinus Torvalds <torvalds@linux-foundation.org>2010-12-07 08:04:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-12-07 08:04:08 -0800
commitc2048b0a0a6e589d9813766489f78185cbabcdc6 (patch)
treee3245fb17e97329925d0aa0a350f604d6d3f1f71
parentde47de7404e29df8de82f5822b4fde1a6ed97b54 (diff)
parent8d7bfb4a891d606d52e1a99cf7231b4417b935dc (diff)
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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
-rw-r--r--arch/s390/kernel/vtime.c19
-rw-r--r--drivers/s390/cio/css.c2
2 files changed, 20 insertions, 1 deletions
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 56c8687b29b..7eff9b7347c 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -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);
}
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index a5050e21715..825951b6b83 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -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