[PATCH V3 1/2] mm: compaction: move compact_memory sysctl to its own file

[<ye.xingchen@zte.com.cn>]

From: Minghao Chi <chi.minghao@zte.com.cn>

The compact_memory is part of compaction, move it to its own file.

Link: https://lore.kernel.org/all/ZAJwoXJCzfk1WIBx@bombadil.infradead.org/
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
---
 kernel/sysctl.c |  7 -------
 mm/compaction.c | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index c14552a662ae..f574f9985df4 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2190,13 +2190,6 @@ static struct ctl_table vm_table[] = {
 		.extra2		= SYSCTL_FOUR,
 	},
 #ifdef CONFIG_COMPACTION
-	{
-		.procname	= "compact_memory",
-		.data		= NULL,
-		.maxlen		= sizeof(int),
-		.mode		= 0200,
-		.proc_handler	= sysctl_compaction_handler,
-	},
 	{
 		.procname	= "compaction_proactiveness",
 		.data		= &sysctl_compaction_proactiveness,
diff --git a/mm/compaction.c b/mm/compaction.c
index 5a9501e0ae01..acbda28c11f4 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -2763,6 +2763,18 @@ int compaction_proactiveness_sysctl_handler(struct ctl_table *table, int write,
 	return 0;
 }

+#ifdef CONFIG_SYSCTL
+static struct ctl_table vm_compact_memory[] = {
+	{
+		.procname	= "compact_memory",
+		.data		= NULL,
+		.maxlen		= sizeof(int),
+		.mode		= 0200,
+		.proc_handler	= sysctl_compaction_handler,
+	},
+	{ }
+};
+#endif
 /*
  * This is the entry point for compacting all nodes via
  * /proc/sys/vm/compact_memory
@@ -3078,6 +3090,9 @@ static int __init kcompactd_init(void)

 	for_each_node_state(nid, N_MEMORY)
 		kcompactd_run(nid);
+#ifdef CONFIG_SYSCTL
+	register_sysctl_init("vm", vm_compact_memory);
+#endif
 	return 0;
 }
 subsys_initcall(kcompactd_init)
-- 
2.25.1