From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>

Don't modify the cpus_allowed of the task initiating the suspend. 
_cpu_down() already makes sure that the task doing the suspend doesn't run
on dying cpu.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Nigel Cunningham <nigel@suspend2.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/cpu.c |    6 +-----
 1 files changed, 1 insertion(+), 5 deletions(-)

diff -puN kernel/cpu.c~suspend-dont-change-cpus_allowed-for-task-initiating-the-suspend kernel/cpu.c
--- a/kernel/cpu.c~suspend-dont-change-cpus_allowed-for-task-initiating-the-suspend
+++ a/kernel/cpu.c
@@ -270,11 +270,7 @@ int disable_nonboot_cpus(void)
 			goto out;
 		}
 	}
-	error = set_cpus_allowed(current, cpumask_of_cpu(first_cpu));
-	if (error) {
-		printk(KERN_ERR "Could not run on CPU%d\n", first_cpu);
-		goto out;
-	}
+
 	/* We take down all of the non-boot CPUs in one shot to avoid races
 	 * with the userspace trying to use the CPU hotplug at the same time
 	 */
_