NFS: Use SEEK_END instead of hardcoded value

Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/file.c

@@ -157,7 +157,7 @@ force_reval:
 static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
 {
 	/* origin == SEEK_END => we must revalidate the cached file length */
-	if (origin == 2) {
+	if (origin == SEEK_END) {
 		struct inode *inode = filp->f_mapping->host;
 		int retval = nfs_revalidate_file_size(inode, filp);
 		if (retval < 0)