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rcu: Per-CPU operation cleanups to rcu_*_qs() functions

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The rcu_bh_qs(), rcu_preempt_qs(), and rcu_sched_qs() functions use
old-style per-CPU variable access and write to ->passed_quiesce even
if it is already set.  This commit therefore updates to use the new-style
per-CPU variable access functions and avoids the spurious writes.
This commit also eliminates the "cpu" argument to these functions because
they are always invoked on the indicated CPU.

Reported-by: Peter Zijlstra <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
This commit is contained in:
Paul E. McKenney 2014-08-14 16:38:46 -07:00
commit 284a8c93af
6 changed files with 42 additions and 37 deletions
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2
kernel/softirq.c
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@ -278,7 +278,7 @@ restart:
pending >>= softirq_bit;
}
rcu_bh_qs(smp_processor_id());
rcu_bh_qs();
local_irq_disable();
pending = local_softirq_pending();