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rcu: Remove unnecessary condition check in rcu_qsctr_help() 

When the ->curtail and ->donetail pointers differ, ->rcucblist
always points to the beginning of the current list and thus
cannot be NULL. Therefore, the check ->rcucblist != NULL is
redundant and this commit removes it.

Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Alexander Gordeev 2015-02-11 15:42:37 +01:00 committed by Paul E. McKenney
parent c517d838eb
commit 27153acbe1
1 changed files with 1 additions and 2 deletions
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3
kernel/rcu/tiny.c
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@ -103,8 +103,7 @@ EXPORT_SYMBOL(__rcu_is_watching);
static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
{
RCU_TRACE(reset_cpu_stall_ticks(rcp));
if (rcp->rcucblist != NULL &&
rcp->donetail != rcp->curtail) {
if (rcp->donetail != rcp->curtail) {
rcp->donetail = rcp->curtail;
return 1;
}