autofs4: Pushdown the bkl from ioctl

#include <linux/slab.h>

#include <linux/param.h>

#include <linux/time.h>

#include <linux/smp_lock.h>

#include "autofs_i.h"

static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *);

static int autofs4_dir_unlink(struct inode *,struct dentry *);

static int autofs4_dir_rmdir(struct inode *,struct dentry *);

static int autofs4_dir_mkdir(struct inode *,struct dentry *,int);

static int autofs4_root_ioctl(struct inode *, struct file *,unsigned int,unsigned long);

static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long);

static int autofs4_dir_open(struct inode *inode, struct file *file);

static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);

static void *autofs4_follow_link(struct dentry *, struct nameidata *);

	.read		= generic_read_dir,

	.readdir	= dcache_readdir,

	.llseek		= dcache_dir_lseek,

	.ioctl		= autofs4_root_ioctl,

	.unlocked_ioctl	= autofs4_root_ioctl,

};

const struct file_operations autofs4_dir_operations = {

 * ioctl()'s on the root directory is the chief method for the daemon to

 * generate kernel reactions

 */

static int autofs4_root_ioctl(struct inode *inode, struct file *filp,

static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp,

				       unsigned int cmd, unsigned long arg)

{

	struct autofs_sb_info *sbi = autofs4_sbi(inode->i_sb);

		return -ENOSYS;

	}

}

static long autofs4_root_ioctl(struct file *filp,

			       unsigned int cmd, unsigned long arg)

{

	long ret;

	struct inode *inode = filp->f_dentry->d_inode;

	lock_kernel();

	ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg);

	unlock_kernel();

	return ret;

}