[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>

1 files changed, 12 insertions, 11 deletions

diff --git a/arch/ppc64/kernel/idle.c b/arch/ppc64/kernel/idle.c
index b8cfb37e5f14..954395d42636 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 @@ int default_idle(void)
                         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 @@ int default_idle(void)
                         set_need_resched();
                 }
 
+                ppc64_runlatch_on();
                 schedule();
                 if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
                         cpu_die();
@@ -74,17 +70,22 @@ int default_idle(void)
 
 int native_idle(void)
 {
-        while(1) {
-                /* check CPU type here */
+        while (1) {
+                ppc64_runlatch_off();
+
                 if (!need_resched())
                         power4_idle();
-                if (need_resched())
+
+                if (need_resched()) {
+                        ppc64_runlatch_on();
                         schedule();
+                }
 
-                if (cpu_is_offline(raw_smp_processor_id()) &&
+                if (cpu_is_offline(smp_processor_id()) &&
                     system_state == SYSTEM_RUNNING)
                         cpu_die();
         }
+
         return 0;
 }