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x86: move more common idle functions/variables to process.c

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more unification. Should cause no change in functionality.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2008-06-09 18:35:28 +02:00
committed by Ingo Molnar
parent 09fd4b4ef5
commit 00dba56465
3 changed files with 70 additions and 82 deletions
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70
arch/x86/kernel/process.c
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@@ -45,6 +45,76 @@ void arch_task_cache_init(void)
SLAB_PANIC, NULL);
}
/*
* Idle related variables and functions
*/
unsigned long boot_option_idle_override = 0;
EXPORT_SYMBOL(boot_option_idle_override);
/*
* Powermanagement idle function, if any..
*/
void (*pm_idle)(void);
EXPORT_SYMBOL(pm_idle);
#ifdef CONFIG_X86_32
/*
* This halt magic was a workaround for ancient floppy DMA
* wreckage. It should be safe to remove.
*/
static int hlt_counter;
void disable_hlt(void)
{
hlt_counter++;
}
EXPORT_SYMBOL(disable_hlt);
void enable_hlt(void)
{
hlt_counter--;
}
EXPORT_SYMBOL(enable_hlt);
static inline int hlt_use_halt(void)
{
return (!hlt_counter && boot_cpu_data.hlt_works_ok);
}
#else
static inline int hlt_use_halt(void)
{
return 1;
}
#endif
/*
* We use this if we don't have any better
* idle routine..
*/
void default_idle(void)
{
if (hlt_use_halt()) {
current_thread_info()->status &= ~TS_POLLING;
/*
* TS_POLLING-cleared state must be visible before we
* test NEED_RESCHED:
*/
smp_mb();
if (!need_resched())
safe_halt(); /* enables interrupts racelessly */
else
local_irq_enable();
current_thread_info()->status |= TS_POLLING;
} else {
local_irq_enable();
/* loop is done by the caller */
cpu_relax();
}
}
#ifdef CONFIG_APM_MODULE
EXPORT_SYMBOL(default_idle);
#endif
static void do_nothing(void *unused)
{
}