locks: export setlease to filesystems

Export setlease so it can used by filesystems to implement their lease
methods.
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>

fs/locks.c

@@ -1336,7 +1336,7 @@ int fcntl_getlease(struct file *filp)
  *
  *	Called with kernel lock held.
  */
-static int setlease(struct file *filp, long arg, struct file_lock **flp)
+int setlease(struct file *filp, long arg, struct file_lock **flp)
 {
 	struct file_lock *fl, **before, **my_before = NULL, *lease;
 	struct dentry *dentry = filp->f_path.dentry;
@@ -1421,6 +1421,7 @@ static int setlease(struct file *filp, long arg, struct file_lock **flp)
 out:
 	return error;
 }
+EXPORT_SYMBOL(setlease);
 
  /**
  *	vfs_setlease        -       sets a lease on an open file

include/linux/fs.h

@@ -872,6 +872,7 @@ extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
 extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl);
 extern int __break_lease(struct inode *inode, unsigned int flags);
 extern void lease_get_mtime(struct inode *, struct timespec *time);
+extern int setlease(struct file *, long, struct file_lock **);
 extern int vfs_setlease(struct file *, long, struct file_lock **);
 extern int lease_modify(struct file_lock **, int);
 extern int lock_may_read(struct inode *, loff_t start, unsigned long count);