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authorOleg Nesterov <oleg@redhat.com>2009-05-03 23:11:18 +0200
committerIngo Molnar <mingo@elte.hu>2009-05-05 20:28:05 +0200
commit41c51c98f588edcdf6141cff1895df738e03ddd4 (patch)
treeb33243575558927974e0f90735fac5224dd135cf
parent05725f7eb4b8acb147c5fc7b91397b1f6bcab00d (diff)
downloadlinux-41c51c98f588edcdf6141cff1895df738e03ddd4.tar.gz
rcu: rcu_sched_grace_period(): kill the bogus flush_signals()
As a kernel thread, rcu_sched_grace_period() runs with all signals ignored. It can never receive a signal even if it sleeps in TASK_INTERRUPTIBLE, it needs the explicit allow_signal() to be visible for signals. [ Impact: reduce kernel size, remove dead code ] Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20090503211118.GA22973@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/rcupreempt.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index ce97a4df64d3..beb0e659adcc 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -1356,17 +1356,11 @@ static int rcu_sched_grace_period(void *arg)
rcu_ctrlblk.sched_sleep = rcu_sched_sleeping;
spin_unlock_irqrestore(&rcu_ctrlblk.schedlock, flags);
- ret = 0;
+ ret = 0; /* unused */
__wait_event_interruptible(rcu_ctrlblk.sched_wq,
rcu_ctrlblk.sched_sleep != rcu_sched_sleeping,
ret);
- /*
- * Signals would prevent us from sleeping, and we cannot
- * do much with them in any case. So flush them.
- */
- if (ret)
- flush_signals(current);
couldsleepnext = 0;
} while (!kthread_should_stop());