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x86: use wait_for_init_deassert in x86_64

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wraps the busy loop for wait_for_init_deasserted() in a function,
so smp_callin in x86_64 looks like more i386

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa 2008-03-03 14:13:13 -03:00 committed by Ingo Molnar
parent 91718e8d13
commit e90009bcc1
1 changed files with 8 additions and 2 deletions
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10
arch/x86/kernel/smpboot_64.c
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@ -100,6 +100,13 @@ static void __cpuinit smp_store_cpu_info(int id)
print_cpu_info(c);
}
static inline void wait_for_init_deassert(atomic_t *deassert)
{
while (!atomic_read(deassert))
cpu_relax();
return;
}
static atomic_t init_deasserted __cpuinitdata;
/*
@ -117,8 +124,7 @@ void __cpuinit smp_callin(void)
* our local APIC. We have to wait for the IPI or we'll
* lock up on an APIC access.
*/
while (!atomic_read(&init_deasserted))
cpu_relax();
wait_for_init_deassert(&init_deasserted);
/*
* (This works even if the APIC is not enabled.)