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fs: remove mapping->backing_dev_info

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Now that we never use the backing_dev_info pointer in struct address_space
we can simply remove it and save 4 to 8 bytes in every inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Reviewed-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-01-14 10:42:37 +01:00 • committed by Jens Axboe
parent de1414a654
commit b83ae6d421
32 changed files with 8 additions and 91 deletions
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1
fs/kernfs/inode.c
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@ -286,7 +286,6 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode)
kernfs_get(kn);
inode->i_private = kn;
inode->i_mapping->a_ops = &kernfs_aops;
inode->i_mapping->backing_dev_info = &noop_backing_dev_info;
inode->i_op = &kernfs_iops;
set_default_inode_attr(inode, kn->mode);