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rcu: Remove rsp parameter from expedited grace-period functions

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There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to
RCU's functions.  This commit therefore removes the rsp parameter
from the code in kernel/rcu/tree_exp.h, and removes all of the
rsp local variables while in the area.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2018-07-03 17:22:34 -07:00
parent 4580b0541b
commit 63d4c8c979
4 changed files with 94 additions and 109 deletions
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13
kernel/rcu/tree_plugin.h
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@@ -123,8 +123,7 @@ static void __init rcu_bootup_announce_oddness(void)
#ifdef CONFIG_PREEMPT_RCU
static void rcu_report_exp_rnp(struct rcu_state *rsp, struct rcu_node *rnp,
bool wake);
static void rcu_report_exp_rnp(struct rcu_node *rnp, bool wake);
static void rcu_read_unlock_special(struct task_struct *t);
/*
@@ -281,7 +280,7 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp)
* still in a quiescent state in any case.)
*/
if (blkd_state & RCU_EXP_BLKD && rdp->deferred_qs)
rcu_report_exp_rdp(rdp->rsp, rdp);
rcu_report_exp_rdp(rdp);
else
WARN_ON_ONCE(rdp->deferred_qs);
}
@@ -381,7 +380,7 @@ void rcu_note_context_switch(bool preempt)
*/
rcu_qs();
if (rdp->deferred_qs)
rcu_report_exp_rdp(&rcu_state, rdp);
rcu_report_exp_rdp(rdp);
trace_rcu_utilization(TPS("End context switch"));
barrier(); /* Avoid RCU read-side critical sections leaking up. */
}
@@ -509,7 +508,7 @@ rcu_preempt_deferred_qs_irqrestore(struct task_struct *t, unsigned long flags)
* blocked-tasks list below.
*/
if (rdp->deferred_qs) {
rcu_report_exp_rdp(&rcu_state, rdp);
rcu_report_exp_rdp(rdp);
if (!t->rcu_read_unlock_special.s) {
local_irq_restore(flags);
return;
@@ -580,7 +579,7 @@ rcu_preempt_deferred_qs_irqrestore(struct task_struct *t, unsigned long flags)
* then we need to report up the rcu_node hierarchy.
*/
if (!empty_exp && empty_exp_now)
rcu_report_exp_rnp(&rcu_state, rnp, true);
rcu_report_exp_rnp(rnp, true);
} else {
local_irq_restore(flags);
}
@@ -947,7 +946,7 @@ static void rcu_qs(void)
if (!__this_cpu_read(rcu_data.cpu_no_qs.b.exp))
return;
__this_cpu_write(rcu_data.cpu_no_qs.b.exp, false);
rcu_report_exp_rdp(&rcu_state, this_cpu_ptr(&rcu_data));
rcu_report_exp_rdp(this_cpu_ptr(&rcu_data));
}
/*