[tip:smp/hotplug] m68k: Use generic idle loop

tip-bot for Thomas Gleixner
2013-04-08T20:31:26Z

Commit-ID: dfa174dcf841d0665065dedec2bc133227da56ef
Gitweb: http://git.kernel.org/tip/dfa174dcf841d0665065dedec2bc133227da56ef
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:49 +0100
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:26 +0200

m68k: Use generic idle loop

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: http://lkml.kernel.org/r/20130321215234.535485189@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/m68k/Kconfig | 1 +
arch/m68k/kernel/process.c | 32 ++++----------------------------
2 files changed, 5 insertions(+), 28 deletions(-)

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 6de8133..41859405 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -6,6 +6,7 @@ config M68K
select HAVE_DEBUG_BUGVERBOSE
select HAVE_GENERIC_HARDIRQS
select GENERIC_IRQ_SHOW
+ select GENERIC_IDLE_LOOP
select GENERIC_ATOMIC64
select HAVE_UID16
select VIRT_TO_BUS
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index d538694..c55ff71 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -51,40 +51,16 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
return sw->retpc;
}

-/*
- * The idle loop on an m68k..
- */
-static void default_idle(void)
+void arch_cpu_idle(void)
{
- if (!need_resched())
#if defined(MACH_ATARI_ONLY)
- /* block out HSYNC on the atari (falcon) */
- __asm__("stop #0x2200" : : : "cc");
+ /* block out HSYNC on the atari (falcon) */
+ __asm__("stop #0x2200" : : : "cc");
#else
- __asm__("stop #0x2000" : : : "cc");
+ __asm__("stop #0x2000" : : : "cc");
#endif
}

-void (*idle)(void) = default_idle;
-
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle(void)
-{
- /* endless idle loop with no priority at all */
- while (1) {
- rcu_idle_enter();
- while (!need_resched())
- idle();
- rcu_idle_exit();
- schedule_preempt_disabled();
- }
-}
-
void machine_restart(char * __unused)
{
if (mach_reset)