linux-kernel - [tip: sched/fifo] sched,spi: Convert to sched_set

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Date:   Fri, 24 Jul 2020 08:33:45 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     broonie@...nel.org,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Guenter Roeck <groeck@...omium.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: sched/fifo] sched,spi: Convert to sched_set_fifo*()

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

Commit-ID:     3070da33400c18e0454832425a530d2d0e6a6fcf
Gitweb:        https://git.kernel.org/tip/3070da33400c18e0454832425a530d2d0e6a6fcf
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Tue, 21 Apr 2020 12:09:13 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 15 Jun 2020 14:10:22 +02:00

sched,spi: Convert to sched_set_fifo*()

Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

No effective change.

Cc: broonie@...nel.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Reviewed-by: Guenter Roeck <groeck@...omium.org>
---
 drivers/platform/chrome/cros_ec_spi.c | 6 +-----
 drivers/spi/spi.c                     | 4 +---
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c
index debea5c..c20a43a 100644
--- a/drivers/platform/chrome/cros_ec_spi.c
+++ b/drivers/platform/chrome/cros_ec_spi.c
@@ -709,9 +709,6 @@ static void cros_ec_spi_high_pri_release(void *worker)
 static int cros_ec_spi_devm_high_pri_alloc(struct device *dev,
 					   struct cros_ec_spi *ec_spi)
 {
-	struct sched_param sched_priority = {
-		.sched_priority = MAX_RT_PRIO / 2,
-	};
 	int err;
 
 	ec_spi->high_pri_worker =
@@ -728,8 +725,7 @@ static int cros_ec_spi_devm_high_pri_alloc(struct device *dev,
 	if (err)
 		return err;
 
-	err = sched_setscheduler_nocheck(ec_spi->high_pri_worker->task,
-					 SCHED_FIFO, &sched_priority);
+	err = sched_set_fifo(ec_spi->high_pri_worker->task);
 	if (err)
 		dev_err(dev, "Can't set cros_ec high pri priority: %d\n", err);
 	return err;
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 8158e28..5a4f0bf 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1592,11 +1592,9 @@ EXPORT_SYMBOL_GPL(spi_take_timestamp_post);
  */
 static void spi_set_thread_rt(struct spi_controller *ctlr)
 {
-	struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
-
 	dev_info(&ctlr->dev,
 		"will run message pump with realtime priority\n");
-	sched_setscheduler(ctlr->kworker_task, SCHED_FIFO, &param);
+	sched_set_fifo(ctlr->kworker_task);
 }
 
 static int spi_init_queue(struct spi_controller *ctlr)