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x86: Use kick_all_cpus_sync()

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Use kick_all_cpus_sync() and remove cpu_idle_wait().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120507175652.190382227@linutronix.de
Cc: x86@kernel.org
This commit is contained in:
Thomas Gleixner 2012-05-07 17:59:49 +00:00
parent 4a1625133d
commit 85f7f65627
4 changed files with 1 additions and 26 deletions
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3
arch/x86/Kconfig
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@ -161,9 +161,6 @@ config RWSEM_GENERIC_SPINLOCK
config RWSEM_XCHGADD_ALGORITHM
def_bool X86_XADD
config ARCH_HAS_CPU_IDLE_WAIT
def_bool y
config GENERIC_CALIBRATE_DELAY
def_bool y

2
arch/x86/include/asm/processor.h
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@ -974,8 +974,6 @@ extern bool cpu_has_amd_erratum(const int *);
#define cpu_has_amd_erratum(x) (false)
#endif /* CONFIG_CPU_SUP_AMD */
void cpu_idle_wait(void);
extern unsigned long arch_align_stack(unsigned long sp);
extern void free_init_pages(char *what, unsigned long begin, unsigned long end);

2
arch/x86/kernel/apm_32.c
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@ -2401,7 +2401,7 @@ static void __exit apm_exit(void)
* (pm_idle), Wait for all processors to update cached/local
* copies of pm_idle before proceeding.
*/
cpu_idle_wait();
kick_all_cpus_sync();
}
if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
&& (apm_info.connection_version > 0x0100)) {

20
arch/x86/kernel/process.c
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@ -525,26 +525,6 @@ void stop_this_cpu(void *dummy)
}
}
static void do_nothing(void *unused)
{
}
/*
* cpu_idle_wait - Used to ensure that all the CPUs discard old value of
* pm_idle and update to new pm_idle value. Required while changing pm_idle
* handler on SMP systems.
*
* Caller must have changed pm_idle to the new value before the call. Old
* pm_idle value will not be used by any CPU after the return of this function.
*/
void cpu_idle_wait(void)
{
smp_mb();
/* kick all the CPUs so that they exit out of pm_idle */
smp_call_function(do_nothing, NULL, 1);
}
EXPORT_SYMBOL_GPL(cpu_idle_wait);
/* Default MONITOR/MWAIT with no hints, used for default C1 state */
static void mwait_idle(void)
{