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x86: remove additional_cpus configurability

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additional_cpus=<x> parameter is dangerous and broken: for example
if we boot additional_cpus=-2 on a stock dual-core system it will
crash the box on bootup.

So reduce the maze of code a bit by removingthe user-configurability
angle.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2008-10-05 17:12:36 +02:00
parent 649c6653fa
commit b807305059
2 changed files with 1 additions and 25 deletions
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8
arch/x86/kernel/smpboot.c
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@@ -1261,7 +1261,7 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
check_nmi_watchdog();
}
static int additional_cpus __initdata = CONFIG_HOTPLUG_ADDITIONAL_CPUS;
static int additional_cpus = -1;
/*
* cpu_possible_map should be static, it cannot change as cpu's
@@ -1334,12 +1334,6 @@ static void remove_siblinginfo(int cpu)
cpu_clear(cpu, cpu_sibling_setup_map);
}
static __init int setup_additional_cpus(char *s)
{
return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
}
early_param("additional_cpus", setup_additional_cpus);
static void __ref remove_cpu_from_maps(int cpu)
{
cpu_clear(cpu, cpu_online_map);