Commit 45e75dfb authored by Anton Blanchard's avatar Anton Blanchard Committed by Linus Torvalds
Browse files

[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: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 050a0938

arch/ppc64/kernel/idle.c

+12 −11
Original line number Diff line number Diff line
@@ -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();
@@ -75,16 +71,21 @@ int default_idle(void) 
int native_idle(void)

{

	while (1) {

		/* check CPU type here */

		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;

}

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