| Submitter | Srivatsa S. Bhat |
|---|---|
| Date | Jan. 22, 2013, 7:36 a.m. |
| Message ID | <20130122073653.13822.14127.stgit@srivatsabhat.in.ibm.com> |
| Download | mbox | patch |
| Permalink | /patch/214406/ |
| State | Not Applicable |
| Headers | show |
Comments
Patch
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index f113755..d123a2c 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -160,6 +160,7 @@ static void tick_do_broadcast(struct cpumask *mask) */ static void tick_do_periodic_broadcast(void) { + get_online_cpus_atomic(); raw_spin_lock(&tick_broadcast_lock); cpumask_and(to_cpumask(tmpmask), @@ -167,6 +168,7 @@ static void tick_do_periodic_broadcast(void) tick_do_broadcast(to_cpumask(tmpmask)); raw_spin_unlock(&tick_broadcast_lock); + put_online_cpus_atomic(); } /*
Once stop_machine() is gone from the CPU offline path, we won't be able to depend on preempt_disable() or local_irq_disable() to prevent CPUs from going offline from under us. Use the get/put_online_cpus_atomic() APIs to prevent CPUs from going offline, while invoking from atomic context. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> --- kernel/time/tick-broadcast.c | 2 ++ 1 file changed, 2 insertions(+)