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fs: deduplicate noop_backing_dev_info

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hugetlbfs, kernfs and dlmfs can simply use noop_backing_dev_info instead
of creating a local duplicate.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-01-14 10:42:30 +01:00 • committed by Jens Axboe
parent ec6f34e5b5
commit a7a2c680a2
5 changed files with 4 additions and 42 deletions
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14
fs/kernfs/inode.c
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@ -24,12 +24,6 @@ static const struct address_space_operations kernfs_aops = {
.write_end = simple_write_end,
};
static struct backing_dev_info kernfs_bdi = {
.name = "kernfs",
.ra_pages = 0, /* No readahead */
.capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
};
static const struct inode_operations kernfs_iops = {
.permission = kernfs_iop_permission,
.setattr = kernfs_iop_setattr,
@ -40,12 +34,6 @@ static const struct inode_operations kernfs_iops = {
.listxattr = kernfs_iop_listxattr,
};
void __init kernfs_inode_init(void)
{
if (bdi_init(&kernfs_bdi))
panic("failed to init kernfs_bdi");
}
static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)
{
static DEFINE_MUTEX(iattr_mutex);
@ -298,7 +286,7 @@ 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 = &kernfs_bdi;
inode->i_mapping->backing_dev_info = &noop_backing_dev_info;
inode->i_op = &kernfs_iops;
set_default_inode_attr(inode, kn->mode);