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srcu: Allow a second bit in rcu_seq for SRCU state
author
Paul E. McKenney
<paulmck@linux.vnet.ibm.com>
Tue, 21 Mar 2017 17:35:57 +0000
(10:35 -0700)
committer
Paul E. McKenney
<paulmck@linux.vnet.ibm.com>
Tue, 18 Apr 2017 18:38:21 +0000
(11:38 -0700)
This commit increases the number of reserved bits at the bottom of an
rcu_seq grace-period counter from one to two, as will be needed to
accommodate SRCU's three-state grace periods.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcu/rcu.h
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diff --git
a/kernel/rcu/rcu.h
b/kernel/rcu/rcu.h
index c62df93bfc1b316a03fe9c6772e83c1c8a9f6550..87a0ac95b55148a95c0ef4f9f4569cec258741a2 100644
(file)
--- a/
kernel/rcu/rcu.h
+++ b/
kernel/rcu/rcu.h
@@
-61,7
+61,7
@@
* Grace-period counter management.
*/
-#define RCU_SEQ_CTR_SHIFT
1
+#define RCU_SEQ_CTR_SHIFT
2
#define RCU_SEQ_STATE_MASK ((1 << RCU_SEQ_CTR_SHIFT) - 1)
/*