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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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