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

Commit-ID:     e05777c44e53df8ab41d930510a384d65a34aafa
Gitweb:        https://git.kernel.org/tip/e05777c44e53df8ab41d930510a384d65a34aafa
Author:        Peter Zijlstra <peterz@infradead.org>
AuthorDate:    Mon, 11 May 2026 13:31:07 +02:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Tue, 26 May 2026 13:53:13 +02:00

sched/debug: Collapse subsequent CONFIG_SCHED_CLASS_EXT sections

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260511120627.281160085@infradead.org
---
 kernel/sched/debug.c | 92 ++++++++++++++++++++-----------------------
 1 file changed, 44 insertions(+), 48 deletions(-)

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4cdf2f9..4809e1d 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -488,6 +488,8 @@ static const struct file_operations fair_server_runtime_fops = {
 	.release	= single_release,
 };
 
+static struct dentry *debugfs_sched;
+
 #ifdef CONFIG_SCHED_CLASS_EXT
 static ssize_t
 sched_ext_server_runtime_write(struct file *filp, const char __user *ubuf,
@@ -520,75 +522,92 @@ static const struct file_operations ext_server_runtime_fops = {
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };
-#endif /* CONFIG_SCHED_CLASS_EXT */
 
 static ssize_t
-sched_fair_server_period_write(struct file *filp, const char __user *ubuf,
-			       size_t cnt, loff_t *ppos)
+sched_ext_server_period_write(struct file *filp, const char __user *ubuf,
+			      size_t cnt, loff_t *ppos)
 {
 	long cpu = (long) ((struct seq_file *) filp->private_data)->private;
 	struct rq *rq = cpu_rq(cpu);
 
 	return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD,
-					&rq->fair_server);
+					&rq->ext_server);
 }
 
-static int sched_fair_server_period_show(struct seq_file *m, void *v)
+static int sched_ext_server_period_show(struct seq_file *m, void *v)
 {
 	unsigned long cpu = (unsigned long) m->private;
 	struct rq *rq = cpu_rq(cpu);
 
-	return sched_server_show_common(m, v, DL_PERIOD, &rq->fair_server);
+	return sched_server_show_common(m, v, DL_PERIOD, &rq->ext_server);
 }
 
-static int sched_fair_server_period_open(struct inode *inode, struct file *filp)
+static int sched_ext_server_period_open(struct inode *inode, struct file *filp)
 {
-	return single_open(filp, sched_fair_server_period_show, inode->i_private);
+	return single_open(filp, sched_ext_server_period_show, inode->i_private);
 }
 
-static const struct file_operations fair_server_period_fops = {
-	.open		= sched_fair_server_period_open,
-	.write		= sched_fair_server_period_write,
+static const struct file_operations ext_server_period_fops = {
+	.open		= sched_ext_server_period_open,
+	.write		= sched_ext_server_period_write,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };
 
-#ifdef CONFIG_SCHED_CLASS_EXT
+static void debugfs_ext_server_init(void)
+{
+	struct dentry *d_ext;
+	unsigned long cpu;
+
+	d_ext = debugfs_create_dir("ext_server", debugfs_sched);
+	if (!d_ext)
+		return;
+
+	for_each_possible_cpu(cpu) {
+		struct dentry *d_cpu;
+		char buf[32];
+
+		snprintf(buf, sizeof(buf), "cpu%lu", cpu);
+		d_cpu = debugfs_create_dir(buf, d_ext);
+
+		debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &ext_server_runtime_fops);
+		debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &ext_server_period_fops);
+	}
+}
+#endif /* CONFIG_SCHED_CLASS_EXT */
+
 static ssize_t
-sched_ext_server_period_write(struct file *filp, const char __user *ubuf,
-			      size_t cnt, loff_t *ppos)
+sched_fair_server_period_write(struct file *filp, const char __user *ubuf,
+			       size_t cnt, loff_t *ppos)
 {
 	long cpu = (long) ((struct seq_file *) filp->private_data)->private;
 	struct rq *rq = cpu_rq(cpu);
 
 	return sched_server_write_common(filp, ubuf, cnt, ppos, DL_PERIOD,
-					&rq->ext_server);
+					&rq->fair_server);
 }
 
-static int sched_ext_server_period_show(struct seq_file *m, void *v)
+static int sched_fair_server_period_show(struct seq_file *m, void *v)
 {
 	unsigned long cpu = (unsigned long) m->private;
 	struct rq *rq = cpu_rq(cpu);
 
-	return sched_server_show_common(m, v, DL_PERIOD, &rq->ext_server);
+	return sched_server_show_common(m, v, DL_PERIOD, &rq->fair_server);
 }
 
-static int sched_ext_server_period_open(struct inode *inode, struct file *filp)
+static int sched_fair_server_period_open(struct inode *inode, struct file *filp)
 {
-	return single_open(filp, sched_ext_server_period_show, inode->i_private);
+	return single_open(filp, sched_fair_server_period_show, inode->i_private);
 }
 
-static const struct file_operations ext_server_period_fops = {
-	.open		= sched_ext_server_period_open,
-	.write		= sched_ext_server_period_write,
+static const struct file_operations fair_server_period_fops = {
+	.open		= sched_fair_server_period_open,
+	.write		= sched_fair_server_period_write,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };
-#endif /* CONFIG_SCHED_CLASS_EXT */
-
-static struct dentry *debugfs_sched;
 
 static void debugfs_fair_server_init(void)
 {
@@ -611,29 +630,6 @@ static void debugfs_fair_server_init(void)
 	}
 }
 
-#ifdef CONFIG_SCHED_CLASS_EXT
-static void debugfs_ext_server_init(void)
-{
-	struct dentry *d_ext;
-	unsigned long cpu;
-
-	d_ext = debugfs_create_dir("ext_server", debugfs_sched);
-	if (!d_ext)
-		return;
-
-	for_each_possible_cpu(cpu) {
-		struct dentry *d_cpu;
-		char buf[32];
-
-		snprintf(buf, sizeof(buf), "cpu%lu", cpu);
-		d_cpu = debugfs_create_dir(buf, d_ext);
-
-		debugfs_create_file("runtime", 0644, d_cpu, (void *) cpu, &ext_server_runtime_fops);
-		debugfs_create_file("period", 0644, d_cpu, (void *) cpu, &ext_server_period_fops);
-	}
-}
-#endif /* CONFIG_SCHED_CLASS_EXT */
-
 static __init int sched_init_debug(void)
 {
 	struct dentry __maybe_unused *numa, *llc;