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rcu: Eliminate in_irq() checks in rcu_enter_nohz()
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Sat, 6 Aug 2011 05:39:02 +0000 (22:39 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Thu, 29 Sep 2011 04:38:31 +0000 (21:38 -0700)
commit717f98f0f87c16c1e5768ac8f67c27f3d3535a25
tree4d2234eb29a350a3a5b1d7e4d29445c57b66f9f2tree | snapshot (tar.gz zip)
parentfc0763f53e3ff6a6bfa66934662a3446b9ca6f16commit | diff
rcu: Eliminate in_irq() checks in rcu_enter_nohz()

The in_irq() check in rcu_enter_nohz() is redundant because if we really
are in an interrupt, the attempt to re-enter dyntick-idle mode will invoke
rcu_needs_cpu() in any case, which will force the check for RCU callbacks.
So this commit removes the check along with the set_need_resched().

Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcutree.c diff | blob | blame | history