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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-01-04 15:09:04 -0800
committerIngo Molnar <mingo@elte.hu>2010-01-13 09:06:03 +0100
commit39c0bbfc07c6e28db7346d0e11106f2d045d3035 (patch)
tree82f0fdacb1eea0334e76e0adb8b9d5beec66f2a7 /kernel/rcutree.h
parentf3a8b5c6aa543bd87764418d63632eb65b80e2f6 (diff)
rcu: Eliminate local variable lastcomp from force_quiescent_state()
Because rsp->fqs_active is set to 1 across force_quiescent_state()'s switch statement, rcu_start_gp() will refrain from starting a new grace period during this time. Therefore, rsp->gpnum is constant, and can be propagated to all uses of lastcomp, eliminating this local variable. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <12626465502985-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index dc386a7c634f..534856121b06 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -296,8 +296,6 @@ struct rcu_state {
long orphan_qlen; /* Number of orphaned cbs. */
spinlock_t fqslock; /* Only one task forcing */
/* quiescent states. */
- long completed_fqs; /* Value of completed @ snap. */
- /* Protected by fqslock. */
unsigned long jiffies_force_qs; /* Time at which to invoke */
/* force_quiescent_state(). */
unsigned long n_force_qs; /* Number of calls to */

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