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rcu: Remove fastpath from __rcu_process_callbacks()

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The standard code path accommodates a condition when no
RCU callbacks are ready to invoke. Since size of the code
is a priority for tiny RCU, remove the fast path.

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 15:42:38 +01:00 committed by Paul E. McKenney
parent 27153acbe1
commit 915e8a4fe4
1 changed files with 0 additions and 11 deletions
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11
kernel/rcu/tiny.c
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@ -168,17 +168,6 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
unsigned long flags; unsigned long flags;
RCU_TRACE(int cb_count = 0); RCU_TRACE(int cb_count = 0);
/* If no RCU callbacks ready to invoke, just return. */
if (&rcp->rcucblist == rcp->donetail) {
RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, 0, -1));
RCU_TRACE(trace_rcu_batch_end(rcp->name, 0,
!!ACCESS_ONCE(rcp->rcucblist),
need_resched(),
is_idle_task(current),
false));
return;
}
/* Move the ready-to-invoke callbacks to a local list. */ /* Move the ready-to-invoke callbacks to a local list. */
local_irq_save(flags); local_irq_save(flags);
RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, rcp->qlen, -1)); RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, rcp->qlen, -1));