[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 b8cfb37e5f149f54fdf999fa40d80948004aa12e..954395d426363ab54c21d4f484b25a91e805abf0 100644 (file)
--- 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;
 }