linux-kernel - [PATCH v2 8/9] sched: Move /proc/sched

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Date:   Mon, 12 Apr 2021 12:14:29 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     mingo@...nel.org, mgorman@...e.de, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        joshdon@...gle.com, valentin.schneider@....com
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org, greg@...ah.com,
        linux@...musvillemoes.dk,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v2 8/9] sched: Move /proc/sched_debug to debugfs


Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 kernel/sched/debug.c |   25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -279,6 +279,20 @@ static const struct file_operations sche
 
 __read_mostly bool sched_debug_enabled;
 
+static const struct seq_operations sched_debug_sops;
+
+static int sched_debug_open(struct inode *inode, struct file *filp)
+{
+	return seq_open(filp, &sched_debug_sops);
+}
+
+static const struct file_operations sched_debug_fops = {
+	.open		= sched_debug_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
 static struct dentry *debugfs_sched;
 
 static __init int sched_init_debug(void)
@@ -316,6 +330,8 @@ static __init int sched_init_debug(void)
 	debugfs_create_u32("scan_size_mb", 0644, numa, &sysctl_numa_balancing_scan_size);
 #endif
 
+	debugfs_create_file("debug", 0444, debugfs_sched, NULL, &sched_debug_fops);
+
 	return 0;
 }
 late_initcall(sched_init_debug);
@@ -854,15 +870,6 @@ static const struct seq_operations sched
 	.show		= sched_debug_show,
 };
 
-static int __init init_sched_debug_procfs(void)
-{
-	if (!proc_create_seq("sched_debug", 0444, NULL, &sched_debug_sops))
-		return -ENOMEM;
-	return 0;
-}
-
-__initcall(init_sched_debug_procfs);
-
 #define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F))
 #define __P(F) __PS(#F, F)
 #define   P(F) __PS(#F, p->F)