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Commit bb8416bf authored by Siddha, Suresh B's avatar Siddha, Suresh B Committed by Tony Luck
Browse files

[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: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 9d1d4cc8

arch/ia64/kernel/process.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -237,6 +237,7 @@ void cpu_idle_wait(void) 
{

{

	unsigned int cpu, this_cpu = get_cpu();

	unsigned int cpu, this_cpu = get_cpu();

	cpumask_t map;

	cpumask_t map;

	cpumask_t tmp = current->cpus_allowed;





	set_cpus_allowed(current, cpumask_of_cpu(this_cpu));

	set_cpus_allowed(current, cpumask_of_cpu(this_cpu));

	put_cpu();

	put_cpu();
@@ -258,6 +259,7 @@ void cpu_idle_wait(void) 
		}

		}

		cpus_and(map, map, cpu_online_map);

		cpus_and(map, map, cpu_online_map);

	} while (!cpus_empty(map));

	} while (!cpus_empty(map));

	set_cpus_allowed(current, tmp);

}

}

EXPORT_SYMBOL_GPL(cpu_idle_wait);

EXPORT_SYMBOL_GPL(cpu_idle_wait);