eCryptfs: replace encrypt, decrypt, and inode size write

Replace page encryption and decryption routines and inode size write routine
with versions that utilize the read_write.c functions.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index d70f599..7192a81 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -168,9 +168,7 @@
 		goto out;
 	}
 	i_size_write(inode, 0);
-	rc = ecryptfs_write_inode_size_to_metadata(lower_file, lower_inode,
-			inode, ecryptfs_dentry,
-			ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
+	rc = ecryptfs_write_inode_size_to_metadata(inode);
 	ecryptfs_inode_to_private(inode)->crypt_stat.flags |= ECRYPTFS_NEW_FILE;
 out:
 	return rc;
@@ -798,9 +796,7 @@
 			goto out_fput;
 		}
 		i_size_write(inode, new_length);
-		rc = ecryptfs_write_inode_size_to_metadata(
-			lower_file, lower_dentry->d_inode, inode, dentry,
-			ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
+		rc = ecryptfs_write_inode_size_to_metadata(inode);
 		if (rc) {
 			printk(KERN_ERR	"Problem with "
 			       "ecryptfs_write_inode_size_to_metadata; "
@@ -829,9 +825,7 @@
 			}
 		}
 		vmtruncate(inode, new_length);
-		rc = ecryptfs_write_inode_size_to_metadata(
-			lower_file, lower_dentry->d_inode, inode, dentry,
-			ECRYPTFS_LOWER_I_MUTEX_NOT_HELD);
+		rc = ecryptfs_write_inode_size_to_metadata(inode);
 		if (rc) {
 			printk(KERN_ERR	"Problem with "
 			       "ecryptfs_write_inode_size_to_metadata; "