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    Subject[patch 3/8] inode-diet: Move i_bdev into a union
    Move the i_bdev pointer in struct inode into a union.

    Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>


    Index: linux-2.6.17-mm5/include/linux/fs.h
    ===================================================================
    --- linux-2.6.17-mm5.orig/include/linux/fs.h 2006-07-02 20:28:45.000000000 -0400
    +++ linux-2.6.17-mm5/include/linux/fs.h 2006-07-02 20:28:55.000000000 -0400
    @@ -526,8 +526,8 @@
    struct list_head i_devices;
    union {
    struct pipe_inode_info *i_pipe;
    + struct block_device *i_bdev;
    };
    - struct block_device *i_bdev;
    struct cdev *i_cdev;
    int i_cindex;

    Index: linux-2.6.17-mm5/fs/inode.c
    ===================================================================
    --- linux-2.6.17-mm5.orig/fs/inode.c 2006-07-02 20:27:00.000000000 -0400
    +++ linux-2.6.17-mm5/fs/inode.c 2006-07-02 20:28:55.000000000 -0400
    @@ -254,7 +254,7 @@
    DQUOT_DROP(inode);
    if (inode->i_sb && inode->i_sb->s_op->clear_inode)
    inode->i_sb->s_op->clear_inode(inode);
    - if (inode->i_bdev)
    + if (S_ISBLK(inode->i_mode) && inode->i_bdev)
    bd_forget(inode);
    if (inode->i_cdev)
    cd_forget(inode);
    --
    -
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