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authorClark Williams <williams@redhat.com>2012-01-12 22:11:05 -0600
committerClark Williams <williams@redhat.com>2012-01-12 22:11:05 -0600
commit937f5e333d0b05638126f651135d3b8fd6b43665 (patch)
tree8c85f620680aca1496b8914288bb38ce11c320fc /arch
parentd76fe430665fac3f44ee88958713ecc524fd778d (diff)
parentb8ed9e5b8c34dc9fb1882669e45b21e3d0194881 (diff)
Merge commit 'v3.2.1' into rt-3.2.1-rt9v3.2.1-rt9
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/time.h2
-rw-r--r--arch/powerpc/kernel/irq.c15
-rw-r--r--arch/powerpc/kernel/time.c9
-rw-r--r--arch/powerpc/platforms/pseries/hvCall_inst.c4
-rw-r--r--arch/powerpc/platforms/pseries/lpar.c2
5 files changed, 20 insertions, 12 deletions
diff --git a/arch/powerpc/include/asm/time.h b/arch/powerpc/include/asm/time.h
index fe6f7c2c9c68..bc3c745cb906 100644
--- a/arch/powerpc/include/asm/time.h
+++ b/arch/powerpc/include/asm/time.h
@@ -219,5 +219,7 @@ DECLARE_PER_CPU(struct cpu_usage, cpu_usage_array);
extern void secondary_cpu_time_init(void);
extern void iSeries_time_init_early(void);
+extern void decrementer_check_overflow(void);
+
#endif /* __KERNEL__ */
#endif /* __POWERPC_TIME_H */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 680ee60985c5..e0ee53177ea5 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -164,16 +164,13 @@ notrace void arch_local_irq_restore(unsigned long en)
*/
local_paca->hard_enabled = en;
-#ifndef CONFIG_BOOKE
- /* On server, re-trigger the decrementer if it went negative since
- * some processors only trigger on edge transitions of the sign bit.
- *
- * BookE has a level sensitive decrementer (latches in TSR) so we
- * don't need that
+ /*
+ * Trigger the decrementer if we have a pending event. Some processors
+ * only trigger on edge transitions of the sign bit. We might also
+ * have disabled interrupts long enough that the decrementer wrapped
+ * to positive.
*/
- if ((int)mfspr(SPRN_DEC) < 0)
- mtspr(SPRN_DEC, 1);
-#endif /* CONFIG_BOOKE */
+ decrementer_check_overflow();
/*
* Force the delivery of pending soft-disabled interrupts on PS3.
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 522bb1dfc353..5db163c96751 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -889,6 +889,15 @@ static void __init clocksource_init(void)
clock->name, clock->mult, clock->shift);
}
+void decrementer_check_overflow(void)
+{
+ u64 now = get_tb_or_rtc();
+ struct decrementer_clock *decrementer = &__get_cpu_var(decrementers);
+
+ if (now >= decrementer->next_tb)
+ set_dec(1);
+}
+
static int decrementer_set_next_event(unsigned long evt,
struct clock_event_device *dev)
{
diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c
index f106662f4381..c9311cfdfcac 100644
--- a/arch/powerpc/platforms/pseries/hvCall_inst.c
+++ b/arch/powerpc/platforms/pseries/hvCall_inst.c
@@ -109,7 +109,7 @@ static void probe_hcall_entry(void *ignored, unsigned long opcode, unsigned long
if (opcode > MAX_HCALL_OPCODE)
return;
- h = &get_cpu_var(hcall_stats)[opcode / 4];
+ h = &__get_cpu_var(hcall_stats)[opcode / 4];
h->tb_start = mftb();
h->purr_start = mfspr(SPRN_PURR);
}
@@ -126,8 +126,6 @@ static void probe_hcall_exit(void *ignored, unsigned long opcode, unsigned long
h->num_calls++;
h->tb_total += mftb() - h->tb_start;
h->purr_total += mfspr(SPRN_PURR) - h->purr_start;
-
- put_cpu_var(hcall_stats);
}
static int __init hcall_inst_init(void)
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 27a49508b410..dc36ea6c7727 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -554,6 +554,7 @@ void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
goto out;
(*depth)++;
+ preempt_disable();
trace_hcall_entry(opcode, args);
(*depth)--;
@@ -576,6 +577,7 @@ void __trace_hcall_exit(long opcode, unsigned long retval,
(*depth)++;
trace_hcall_exit(opcode, retval, retbuf);
+ preempt_enable();
(*depth)--;
out: