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m68k: Use generic idle loop

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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>
This commit is contained in:
Thomas Gleixner 2013-03-21 22:49:49 +01:00
parent 01436228bf
commit dfa174dcf8
2 changed files with 5 additions and 28 deletions
arch/m68k
Kconfig
kernel
process.c

1
arch/m68k/Kconfig
View file

@ -6,6 +6,7 @@ config M68K
select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_BUGVERBOSE
select HAVE_GENERIC_HARDIRQS select HAVE_GENERIC_HARDIRQS
select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW
select GENERIC_IDLE_LOOP
select GENERIC_ATOMIC64 select GENERIC_ATOMIC64
select HAVE_UID16 select HAVE_UID16
select VIRT_TO_BUS select VIRT_TO_BUS

32
arch/m68k/kernel/process.c
View file

@ -51,40 +51,16 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
return sw->retpc; return sw->retpc;
} }
/* void arch_cpu_idle(void)
* The idle loop on an m68k..
*/
static void default_idle(void)
{ {
if (!need_resched())
#if defined(MACH_ATARI_ONLY) #if defined(MACH_ATARI_ONLY)
/* block out HSYNC on the atari (falcon) */ /* block out HSYNC on the atari (falcon) */
__asm__("stop #0x2200" : : : "cc"); __asm__("stop #0x2200" : : : "cc");
#else #else
__asm__("stop #0x2000" : : : "cc"); __asm__("stop #0x2000" : : : "cc");
#endif #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) void machine_restart(char * __unused)
{ {
if (mach_reset) if (mach_reset)