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[IA64] save and restore cpus_allowed in cpu_idle_wait 

Save and Restore the task's cpus_allowed mask, across the set_cpus_allowed()
in cpu_idle_wait(). Without this, we will endup corrupting task's cpu affinity.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Siddha, Suresh B 2007-05-08 09:22:47 -07:00 committed by Tony Luck
parent 9d1d4cc89f
commit bb8416bf8b
1 changed files with 2 additions and 0 deletions
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2
arch/ia64/kernel/process.c
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@ -237,6 +237,7 @@ void cpu_idle_wait(void)
{
unsigned int cpu, this_cpu = get_cpu();
cpumask_t map;
cpumask_t tmp = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
put_cpu();
@ -258,6 +259,7 @@ void cpu_idle_wait(void)
}
cpus_and(map, map, cpu_online_map);
} while (!cpus_empty(map));
set_cpus_allowed(current, tmp);
}
EXPORT_SYMBOL_GPL(cpu_idle_wait);