[patch 19/34] m68k: Use generic idle loop

Thomas Gleixner
2013-03-21T21:58:10Z

[-- Attachment #1: m68k-use-generic-idle-loop.patch --]
[-- Type: text/plain, Size: 1870 bytes --]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/m68k/Kconfig | 1 +
arch/m68k/kernel/process.c | 32 ++++----------------------------
2 files changed, 5 insertions(+), 28 deletions(-)

Index: linux-2.6/arch/m68k/Kconfig
===================================================================
--- linux-2.6.orig/arch/m68k/Kconfig
+++ linux-2.6/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
Index: linux-2.6/arch/m68k/kernel/process.c
===================================================================
--- linux-2.6.orig/arch/m68k/kernel/process.c
+++ linux-2.6/arch/m68k/kernel/process.c
@@ -51,40 +51,16 @@ unsigned long thread_saved_pc(struct tas
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)