linux-kernel - [tip: sched/core] sched: Use task_current() instead of 'rq->curr == p'

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Date:   Thu, 14 Jan 2021 11:29:05 -0000
From:   "tip-bot2 for Hui Su" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Hui Su <sh_def@....com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched: Use task_current() instead of 'rq->curr == p'

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     65bcf072e20ed7597caa902f170f293662b0af3c
Gitweb:        https://git.kernel.org/tip/65bcf072e20ed7597caa902f170f293662b0af3c
Author:        Hui Su <sh_def@....com>
AuthorDate:    Sat, 31 Oct 2020 01:32:23 +08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 14 Jan 2021 11:20:11 +01:00

sched: Use task_current() instead of 'rq->curr == p'

Use the task_current() function where appropriate.

No functional change.

Signed-off-by: Hui Su <sh_def@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Link: https://lkml.kernel.org/r/20201030173223.GA52339@rlk
---
 kernel/sched/deadline.c | 2 +-
 kernel/sched/debug.c    | 2 +-
 kernel/sched/fair.c     | 6 +++---
 kernel/sched/rt.c       | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 75686c6..5421782 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -2514,7 +2514,7 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p)
 static void prio_changed_dl(struct rq *rq, struct task_struct *p,
 			    int oldprio)
 {
-	if (task_on_rq_queued(p) || rq->curr == p) {
+	if (task_on_rq_queued(p) || task_current(rq, p)) {
 #ifdef CONFIG_SMP
 		/*
 		 * This might be too much, but unfortunately
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 2357921..486f403 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -486,7 +486,7 @@ static char *task_group_path(struct task_group *tg)
 static void
 print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
 {
-	if (rq->curr == p)
+	if (task_current(rq, p))
 		SEQ_printf(m, ">R");
 	else
 		SEQ_printf(m, " %c", task_state_to_char(p));
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 53802b7..197a514 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5430,7 +5430,7 @@ static void hrtick_start_fair(struct rq *rq, struct task_struct *p)
 		s64 delta = slice - ran;
 
 		if (delta < 0) {
-			if (rq->curr == p)
+			if (task_current(rq, p))
 				resched_curr(rq);
 			return;
 		}
@@ -10829,7 +10829,7 @@ prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio)
 	 * our priority decreased, or if we are not currently running on
 	 * this runqueue and our priority is higher than the current's
 	 */
-	if (rq->curr == p) {
+	if (task_current(rq, p)) {
 		if (p->prio > oldprio)
 			resched_curr(rq);
 	} else
@@ -10962,7 +10962,7 @@ static void switched_to_fair(struct rq *rq, struct task_struct *p)
 		 * kick off the schedule if running, otherwise just see
 		 * if we can still preempt the current task.
 		 */
-		if (rq->curr == p)
+		if (task_current(rq, p))
 			resched_curr(rq);
 		else
 			check_preempt_curr(rq, p, 0);
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index dbe4629..8f720b7 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -2357,7 +2357,7 @@ prio_changed_rt(struct rq *rq, struct task_struct *p, int oldprio)
 	if (!task_on_rq_queued(p))
 		return;
 
-	if (rq->curr == p) {
+	if (task_current(rq, p)) {
 #ifdef CONFIG_SMP
 		/*
 		 * If our priority decreases while running, we