ext4: Rename i_file_acl to i_file_acl_lo

Rename i_file_acl to i_file_acl_lo. This helps
in finding bugs where we use i_file_acl instead
of the combined i_file_acl_lo and i_file_acl_high

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

fs/ext4/inode.c

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 76ceba2..7bcec18 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2718,7 +2718,7 @@
 	}
 	inode->i_blocks = le32_to_cpu(raw_inode->i_blocks);
 	ei->i_flags = le32_to_cpu(raw_inode->i_flags);
-	ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
+	ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
 	if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
 	    cpu_to_le32(EXT4_OS_HURD))
 		ei->i_file_acl |=
@@ -2866,7 +2866,7 @@
 	    cpu_to_le32(EXT4_OS_HURD))
 		raw_inode->i_file_acl_high =
 			cpu_to_le16(ei->i_file_acl >> 32);
-	raw_inode->i_file_acl = cpu_to_le32(ei->i_file_acl);
+	raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
 	if (!S_ISREG(inode->i_mode)) {
 		raw_inode->i_dir_acl = cpu_to_le32(ei->i_dir_acl);
 	} else {

include/linux/ext4_fs.h

diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 1a27433..6894f36 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -297,7 +297,7 @@
 	} osd1;				/* OS dependent 1 */
 	__le32	i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
 	__le32	i_generation;	/* File version (for NFS) */
-	__le32	i_file_acl;	/* File ACL */
+	__le32	i_file_acl_lo;	/* File ACL */
 	__le32	i_dir_acl;	/* Directory ACL */
 	__le32	i_obso_faddr;	/* Obsoleted fragment address */
 	union {