When CONFIG_SUPERH and CONFIG_VSYSCALL are defined,
vdso_enabled belongs to arch/sh/kernel/vsyscall/vsyscall.c.
So, move it into its own file. After this patch is applied,
all sysctls of vm_table would be moved. So, delete vm_table.

Signed-off-by: Kaixiong Yu <redacted>
Reviewed-by: Kees Cook <kees@kernel.org>
---
v4:
 - const qualify struct ctl_table vdso_table
v3:
 - change the title
---
---
 arch/sh/kernel/vsyscall/vsyscall.c | 14 ++++++++++++++
 kernel/sysctl.c                    | 14 --------------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/sh/kernel/vsyscall/vsyscall.c b/arch/sh/kernel/vsyscall/vsyscall.c
index add35c51e017..898132f34e6a 100644
--- a/arch/sh/kernel/vsyscall/vsyscall.c
+++ b/arch/sh/kernel/vsyscall/vsyscall.c

@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/elf.h>
 #include <linux/sched.h>
+#include <linux/sysctl.h>
 #include <linux/err.h>
 
 /*

@@ -30,6 +31,17 @@ static int __init vdso_setup(char *s)
 }
 __setup("vdso=", vdso_setup);
 
+static const struct ctl_table vdso_table[] = {
+	{
+		.procname	= "vdso_enabled",
+		.data		= &vdso_enabled,
+		.maxlen		= sizeof(vdso_enabled),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+		.extra1		= SYSCTL_ZERO,
+	},
+};
+
 /*
  * These symbols are defined by vsyscall.o to mark the bounds
  * of the ELF DSO images included therein.

@@ -55,6 +67,8 @@ int __init vsyscall_init(void)
 	       &vsyscall_trapa_start,
 	       &vsyscall_trapa_end - &vsyscall_trapa_start);
 
+	register_sysctl_init("vm", vdso_table);
+
 	return 0;
 }
 

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 7ff07b7560b4..cebd0ef5d19d 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c

@@ -2012,23 +2012,9 @@ static struct ctl_table kern_table[] = {
 #endif
 };