kernel/sys.c: Move overflow{uid,gid} sysctl into kernel/sys.c

Moved ctl_tables elements for overflowuid and overflowgid into in
kernel/sys.c. Create a register function that keeps them under "kernel"
and run it after core with postcore_initcall.

This is part of a greater effort to move ctl tables into their
respective subsystems which will reduce the merge conflicts in
kernel/sysctl.c.

Signed-off-by: Joel Granados <[email protected]>

Author: Joelgranados

kernel/sys.c

@@ -181,6 +181,36 @@ int fs_overflowgid = DEFAULT_FS_OVERFLOWGID;
 EXPORT_SYMBOL(fs_overflowuid);
 EXPORT_SYMBOL(fs_overflowgid);
 
+static const struct ctl_table overflow_sysctl_table[] = {
+	{
+		.procname	= "overflowuid",
+		.data		= &overflowuid,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_MAXOLDUID,
+	},
+	{
+		.procname	= "overflowgid",
+		.data		= &overflowgid,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_MAXOLDUID,
+	},
+};
+
+static int __init init_overflow_sysctl(void)
+{
+	register_sysctl_init("kernel", overflow_sysctl_table);
+	return 0;
+}
+
+postcore_initcall(init_overflow_sysctl);
+
+
 /*
  * Returns true if current's euid is same as p's uid or euid,
  * or has CAP_SYS_NICE to p's user_ns.

kernel/sysctl.c

@@ -1475,24 +1475,6 @@ static const struct ctl_table kern_table[] = {
 		.proc_handler	= proc_dointvec,
 	},
 #endif
-	{
-		.procname	= "overflowuid",
-		.data		= &overflowuid,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_MAXOLDUID,
-	},
-	{
-		.procname	= "overflowgid",
-		.data		= &overflowgid,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_MAXOLDUID,
-	},
 	{
 		.procname	= "ngroups_max",
 		.data		= (void *)&ngroups_max,