[PATCH] ppc64: idle fixups
- remove some unnecessary includes
- add runlatch support
- no need to use raw_smp_processor_id any more, current preempt debug
logic checks for processes that are bound to one cpu.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c
index b8cfb37..954395d 100644
--- a/arch/ppc64/kernel/idle.c
+++ b/arch/ppc64/kernel/idle.c
@@ -20,18 +20,12 @@
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/cpu.h>
-#include <linux/module.h>
#include <linux/sysctl.h>
-#include <linux/smp.h>
#include <asm/system.h>
#include <asm/processor.h>
-#include <asm/mmu.h>
#include <asm/cputable.h>
#include <asm/time.h>
-#include <asm/iSeries/HvCall.h>
-#include <asm/iSeries/ItLpQueue.h>
-#include <asm/plpar_wrappers.h>
#include <asm/systemcfg.h>
#include <asm/machdep.h>
@@ -49,7 +43,8 @@
set_thread_flag(TIF_POLLING_NRFLAG);
while (!need_resched() && !cpu_is_offline(cpu)) {
- barrier();
+ ppc64_runlatch_off();
+
/*
* Go into low thread priority and possibly
* low power mode.
@@ -64,6 +59,7 @@
set_need_resched();
}
+ ppc64_runlatch_on();
schedule();
if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
cpu_die();
@@ -74,17 +70,22 @@
int native_idle(void)
{
- while(1) {
- /* check CPU type here */
+ while (1) {
+ ppc64_runlatch_off();
+
if (!need_resched())
power4_idle();
- if (need_resched())
- schedule();
- if (cpu_is_offline(raw_smp_processor_id()) &&
+ if (need_resched()) {
+ ppc64_runlatch_on();
+ schedule();
+ }
+
+ if (cpu_is_offline(smp_processor_id()) &&
system_state == SYSTEM_RUNNING)
cpu_die();
}
+
return 0;
}