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rcu: Drop early GP request check from rcu_gp_kthread()

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Now that grace-period requests use funnel locking and now that they
set ->gp_flags to RCU_GP_FLAG_INIT even when the RCU grace-period
kthread has not yet started, rcu_gp_kthread() no longer needs to check
need_any_future_gp() at startup time.  This commit therefore removes
this check.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Paul E. McKenney 2018-04-19 15:59:55 -07:00
parent c1935209df
commit a458360af6
1 changed files with 0 additions and 6 deletions
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6
kernel/rcu/tree.c
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@ -2135,12 +2135,6 @@ static int __noreturn rcu_gp_kthread(void *arg)
struct rcu_state *rsp = arg;
struct rcu_node *rnp = rcu_get_root(rsp);
/* Check for early-boot work. */
raw_spin_lock_irq_rcu_node(rnp);
if (need_any_future_gp(rnp))
WRITE_ONCE(rsp->gp_flags, RCU_GP_FLAG_INIT);
raw_spin_unlock_irq_rcu_node(rnp);
rcu_bind_gp_kthread();
for (;;) {