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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
	akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
	josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
	rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
	fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 17/52] rcu: Remove rsp parameter from rcu_accelerate_cbs_unlocked()
Date: Wed, 29 Aug 2018 15:38:19 -0700	[thread overview]
Message-ID: <20180829223854.4055-17-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180829223830.GA1800@linux.vnet.ibm.com>

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_unlocked().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 kernel/rcu/tree.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 2c1d457e8cc2..442adb8eedc1 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1703,15 +1703,14 @@ static bool rcu_accelerate_cbs(struct rcu_node *rnp, struct rcu_data *rdp)
  * that a new grace-period request be made, invokes rcu_accelerate_cbs()
  * while holding the leaf rcu_node structure's ->lock.
  */
-static void rcu_accelerate_cbs_unlocked(struct rcu_state *rsp,
-					struct rcu_node *rnp,
+static void rcu_accelerate_cbs_unlocked(struct rcu_node *rnp,
 					struct rcu_data *rdp)
 {
 	unsigned long c;
 	bool needwake;
 
 	lockdep_assert_irqs_disabled();
-	c = rcu_seq_snap(&rsp->gp_seq);
+	c = rcu_seq_snap(&rcu_state.gp_seq);
 	if (!rdp->gpwrap && ULONG_CMP_GE(rdp->gp_seq_needed, c)) {
 		/* Old request still live, so mark recent callbacks. */
 		(void)rcu_segcblist_accelerate(&rdp->cblist, c);
@@ -2758,7 +2757,7 @@ __rcu_process_callbacks(struct rcu_state *rsp)
 	    rcu_segcblist_is_enabled(&rdp->cblist)) {
 		local_irq_save(flags);
 		if (!rcu_segcblist_restempty(&rdp->cblist, RCU_NEXT_READY_TAIL))
-			rcu_accelerate_cbs_unlocked(rsp, rnp, rdp);
+			rcu_accelerate_cbs_unlocked(rnp, rdp);
 		local_irq_restore(flags);
 	}
 
@@ -2845,7 +2844,7 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp,
 
 		/* Start a new grace period if one not already started. */
 		if (!rcu_gp_in_progress()) {
-			rcu_accelerate_cbs_unlocked(rsp, rdp->mynode, rdp);
+			rcu_accelerate_cbs_unlocked(rdp->mynode, rdp);
 		} else {
 			/* Give the grace period a kick. */
 			rdp->blimit = LONG_MAX;
-- 
2.17.1


  parent reply	other threads:[~2018-08-29 22:40 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-29 22:38 [PATCH tip/core/rcu 0/52] Remove rcu_state pointers for v4.20/v5.0 Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 01/52] rcu: Remove rsp parameter from rcu_report_qs_rnp() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 02/52] rcu: Remove rsp parameter from rcu_report_qs_rsp() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 03/52] rcu: Remove rsp parameter from rcu_report_unblock_qs_rnp() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 04/52] rcu: Remove rsp parameter from rcu_report_qs_rdp() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 05/52] rcu: Remove rsp parameter from rcu_gp_in_progress() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 06/52] rcu: Remove rsp parameter from rcu_get_root() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 07/52] rcu: Remove rsp parameter from record_gp_stall_check_time() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 08/52] rcu: Remove rsp parameter from rcu_check_gp_kthread_starvation() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 09/52] rcu: Remove rsp parameter from rcu_dump_cpu_stacks() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 10/52] rcu: Remove rsp parameter from rcu_stall_kick_kthreads() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 11/52] rcu: Remove rsp parameter from print_other_cpu_stall() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 12/52] rcu: Remove rsp parameter from print_cpu_stall() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 13/52] rcu: Remove rsp parameter from check_cpu_stall() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 14/52] rcu: Remove rsp parameter from rcu_future_gp_cleanup() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 15/52] rcu: Remove rsp parameter from rcu_gp_kthread_wake() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 16/52] rcu: Remove rsp parameter from rcu_accelerate_cbs() Paul E. McKenney
2018-08-29 22:38 ` Paul E. McKenney [this message]
2018-08-29 22:38 ` [PATCH tip/core/rcu 18/52] rcu: Remove rsp parameter from rcu_advance_cbs() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 19/52] rcu: Remove rsp parameter from __note_gp_changes() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 20/52] rcu: Remove rsp parameter from note_gp_changes() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 21/52] rcu: Remove rsp parameter from rcu_gp_slow() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 22/52] rcu: Remove rsp parameter from rcu_gp_kthread() and friends Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 23/52] rcu: Remove rsp parameter from rcu_check_quiescent_state() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 24/52] rcu: Remove rsp parameter from CPU hotplug functions Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 25/52] rcu: Remove rsp parameter from rcu_do_batch() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 26/52] rcu: Remove rsp parameter from force-quiescent-state functions Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 27/52] rcu: Remove rsp parameter from rcu_check_gp_start_stall() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 28/52] rcu: Remove rsp parameter from __rcu_process_callbacks() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 29/52] rcu: Remove rsp parameter from __call_rcu() and friend Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 30/52] rcu: Remove rsp parameter from __rcu_pending() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 31/52] rcu: Remove rsp parameter from _rcu_barrier() and friends Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 32/52] rcu: Remove rsp parameter from rcu_boot_init_percpu_data() " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 33/52] rcu: Remove rsp parameter from rcu_init_one() " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 34/52] rcu: Remove rsp parameter from rcu_print_detail_task_stall() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 35/52] rcu: Remove rsp parameter from dump_blkd_tasks() and friend Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 36/52] rcu: Remove rsp parameter from rcu_spawn_one_boost_kthread() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 37/52] rcu: Remove rsp parameter from print_cpu_stall_info() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 38/52] rcu: Remove rsp parameter from no-CBs CPU functions Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 39/52] rcu: Remove rsp parameter from expedited grace-period functions Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 40/52] rcu: Remove rsp parameter from rcu_node tree accessor macros Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 41/52] rcu: Remove rcu_data structure's ->rsp field Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 42/52] rcu: Remove last non-flavor-traversal rsp local variable from tree_plugin.h Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 43/52] rcu: Remove for_each_rcu_flavor() flavor-traversal macro Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 44/52] rcu: Simplify rcutorture_get_gp_data() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 45/52] rcu: Restructure rcu_check_gp_kthread_starvation() Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 46/52] rcu: Eliminate stall-warning use of rsp Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 47/52] rcu: Eliminate grace-period management code " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 48/52] rcu: Eliminate callback-invocation/invocation " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 49/52] rcu: Eliminate quiescent-state and grace-period-nonstart " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 50/52] rcu: Eliminate RCU-barrier " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 51/52] rcu: Eliminate initialization-time " Paul E. McKenney
2018-08-29 22:38 ` [PATCH tip/core/rcu 52/52] rcu: Fix typo in force_qs_rnp()'s parameter's parameter Paul E. McKenney
2018-08-30  2:00 ` [PATCH tip/core/rcu 0/52] Remove rcu_state pointers for v4.20/v5.0 Steven Rostedt
2018-08-30  3:22   ` Paul E. McKenney
2018-08-30  4:10     ` Paul E. McKenney
2018-08-30  4:20       ` Josh Triplett
2018-08-30 15:42         ` Steven Rostedt
2018-08-30 15:44       ` Steven Rostedt
2018-08-30 17:10         ` Paul E. McKenney
2018-08-30 17:40           ` Steven Rostedt
2018-08-30 18:26             ` Paul E. McKenney

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