From 786545ff97f6349eb27e83a6ecfcf1646cd11b6f Mon Sep 17 00:00:00 2001
From: John Galt <johngaltfirstrun@gmail.com>
Date: Wed, 15 Feb 2023 10:44:37 -0500
Subject: [PATCH] erofs/zdata: modify set sched to use FIFO at high prio for
 lower latency

Fixes: bdd668d3b54202
Signed-off-by: Ruchit <ruchitmarathe@gmail.com>
---
 fs/erofs/zdata.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 4414a6572d8e..47c8c3a8f5f5 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -10,6 +10,7 @@
 #include <linux/slab.h>
 #include <linux/cpuhotplug.h>
 
+#include <uapi/linux/sched/types.h>
 #include <trace/events/erofs.h>
 
 /*
@@ -147,15 +148,15 @@ static void erofs_destroy_percpu_workers(void)
 
 static struct kthread_worker *erofs_init_percpu_worker(int cpu)
 {
+	static const struct sched_param sched_zero_prio;
 	struct kthread_worker *worker =
 		kthread_create_worker_on_cpu(cpu, 0, "erofs_worker/%u", cpu);
 
 	if (IS_ERR(worker))
 		return worker;
 	if (IS_ENABLED(CONFIG_EROFS_FS_PCPU_KTHREAD_HIPRI))
-		sched_set_fifo_low(worker->task);
-	else
-		sched_set_normal(worker->task, 0);
+		sched_setscheduler_nocheck(worker->task, SCHED_FIFO, &sched_zero_prio);
+		//sched_set_fifo_low(worker->task);
 	return worker;
 }