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rcu: Remove rsp parameter from rcu_accelerate_cbs() 

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
rcu_accelerate_cbs().

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 532c00c97f
commit 02f501423d
2 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
kernel/rcu/tree.c
View File

@ -1663,11 +1663,11 @@ static void rcu_gp_kthread_wake(void)
*
* The caller must hold rnp->lock with interrupts disabled.
*/
static bool rcu_accelerate_cbs(struct rcu_state *rsp, struct rcu_node *rnp,
struct rcu_data *rdp)
static bool rcu_accelerate_cbs(struct rcu_node *rnp, struct rcu_data *rdp)
{
unsigned long gp_seq_req;
bool ret = false;
struct rcu_state *rsp = &rcu_state;
raw_lockdep_assert_held_rcu_node(rnp);
@ -1719,7 +1719,7 @@ static void rcu_accelerate_cbs_unlocked(struct rcu_state *rsp,
return;
}
raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */
needwake = rcu_accelerate_cbs(rsp, rnp, rdp);
needwake = rcu_accelerate_cbs(rnp, rdp);
raw_spin_unlock_rcu_node(rnp); /* irqs remain disabled. */
if (needwake)
rcu_gp_kthread_wake();
@ -1751,7 +1751,7 @@ static bool rcu_advance_cbs(struct rcu_state *rsp, struct rcu_node *rnp,
rcu_segcblist_advance(&rdp->cblist, rnp->gp_seq);
/* Classify any remaining callbacks. */
return rcu_accelerate_cbs(rsp, rnp, rdp);
return rcu_accelerate_cbs(rnp, rdp);
}
/*
@ -1777,7 +1777,7 @@ static bool __note_gp_changes(struct rcu_state *rsp, struct rcu_node *rnp,
ret = rcu_advance_cbs(rsp, rnp, rdp); /* Advance callbacks. */
trace_rcu_grace_period(rsp->name, rdp->gp_seq, TPS("cpuend"));
} else {
ret = rcu_accelerate_cbs(rsp, rnp, rdp); /* Recent callbacks. */
ret = rcu_accelerate_cbs(rnp, rdp); /* Recent callbacks. */
}
/* Now handle the beginnings of any new-to-this-CPU grace periods. */
@ -2078,7 +2078,7 @@ static void rcu_gp_cleanup(struct rcu_state *rsp)
needgp = true;
}
/* Advance CBs to reduce false positives below. */
if (!rcu_accelerate_cbs(rsp, rnp, rdp) && needgp) {
if (!rcu_accelerate_cbs(rnp, rdp) && needgp) {
WRITE_ONCE(rsp->gp_flags, RCU_GP_FLAG_INIT);
rsp->gp_req_activity = jiffies;
trace_rcu_grace_period(rsp->name, READ_ONCE(rsp->gp_seq),
@ -2331,7 +2331,6 @@ rcu_report_qs_rdp(int cpu, struct rcu_data *rdp)
unsigned long mask;
bool needwake;
struct rcu_node *rnp;
struct rcu_state *rsp = &rcu_state;
rnp = rdp->mynode;
raw_spin_lock_irqsave_rcu_node(rnp, flags);
@ -2359,7 +2358,7 @@ rcu_report_qs_rdp(int cpu, struct rcu_data *rdp)
* This GP can't end until cpu checks in, so all of our
* callbacks can be processed during the next GP.
*/
needwake = rcu_accelerate_cbs(rsp, rnp, rdp);
needwake = rcu_accelerate_cbs(rnp, rdp);
rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags);
/* ^^^ Released rnp->lock */

2
kernel/rcu/tree_plugin.h
View File

@ -1697,7 +1697,7 @@ static void rcu_prepare_for_idle(void)
continue;
rnp = rdp->mynode;
raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */
needwake = rcu_accelerate_cbs(rsp, rnp, rdp);
needwake = rcu_accelerate_cbs(rnp, rdp);
raw_spin_unlock_rcu_node(rnp); /* irqs remain disabled. */
if (needwake)
rcu_gp_kthread_wake();