ext4: Convert bg_block_bitmap to bg_block_bitmap_lo

Convert bg_block_bitmap to bg_block_bitmap_lo
This helps in catching some BUGS due to direct
partial access of these split fields.

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

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 54450fa..1e8eaaf 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -70,9 +70,9 @@ static void ext4_write_super_lockfs(struct super_block *sb);
 ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
                               struct ext4_group_desc *bg)
 {
-       return le32_to_cpu(bg->bg_block_bitmap) |
+       return le32_to_cpu(bg->bg_block_bitmap_lo) |
                (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
-                (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
+               (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
 }
 
 ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -94,7 +94,7 @@ ext4_fsblk_t ext4_inode_table(struct super_block *sb,
 void ext4_block_bitmap_set(struct super_block *sb,
                           struct ext4_group_desc *bg, ext4_fsblk_t blk)
 {
-       bg->bg_block_bitmap = cpu_to_le32((u32)blk);
+       bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);
        if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
                bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);
 }

diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 46b304d..1dab984 100644 (file)
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -105,7 +105,7 @@
  */
 struct ext4_group_desc
 {
-       __le32  bg_block_bitmap;        /* Blocks bitmap block */
+       __le32  bg_block_bitmap_lo;     /* Blocks bitmap block */
        __le32  bg_inode_bitmap;        /* Inodes bitmap block */
        __le32  bg_inode_table;         /* Inodes table block */
        __le16  bg_free_blocks_count;   /* Free blocks count */