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[PATCH] x86_64: Don't call enforce_max_cpus when hotplug is enabled 

enforce_max_cpus nukes out cpu_present_map and cpu_possible_map making it
impossible to add new cpus in the system.  Since it doesnt provide any
additional value apart this call and reference is removed.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ashok Raj 2005-09-09 13:01:53 -07:00 committed by Linus Torvalds
parent fdf26d933a
commit 092c948811
1 changed files with 0 additions and 19 deletions
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19
arch/x86_64/kernel/smpboot.c
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@ -894,23 +894,6 @@ static __init void disable_smp(void)
cpu_set(0, cpu_core_map[0]);
}
/*
* Handle user cpus=... parameter.
*/
static __init void enforce_max_cpus(unsigned max_cpus)
{
int i, k;
k = 0;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_possible(i))
continue;
if (++k > max_cpus) {
cpu_clear(i, cpu_possible_map);
cpu_clear(i, cpu_present_map);
}
}
}
#ifdef CONFIG_HOTPLUG_CPU
/*
* cpu_possible_map should be static, it cannot change as cpu's
@ -999,8 +982,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
current_cpu_data = boot_cpu_data;
current_thread_info()->cpu = 0; /* needed? */
enforce_max_cpus(max_cpus);
#ifdef CONFIG_HOTPLUG_CPU
prefill_possible_map();
#endif