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btrfs: remove struct extent_io_ops

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It's no longer used just remove the function and any related code which
was initialising it for inodes. No functional changes.

Removing 8 bytes from extent_io_tree in turn reduces size of other
structures where it is embedded, notably btrfs_inode where it reduces
size by 24 bytes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-09-18 16:34:39 +03:00 committed by David Sterba
parent 1b36294a6c
commit 905eb88bce
7 changed files with 0 additions and 38 deletions
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2
fs/btrfs/ctree.h
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@ -3583,9 +3583,7 @@ static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);
void btrfs_test_destroy_inode(struct inode *inode);
static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
{
return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);

7
fs/btrfs/disk-io.c
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@ -50,7 +50,6 @@
BTRFS_SUPER_FLAG_METADUMP |\
BTRFS_SUPER_FLAG_METADUMP_V2)
static const struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
@ -2065,8 +2064,6 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
BTRFS_I(inode)->io_tree.track_uptodate = false;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops;
BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root);
memset(&BTRFS_I(inode)->location, 0, sizeof(struct btrfs_key));
set_bit(BTRFS_INODE_DUMMY, &BTRFS_I(inode)->runtime_flags);
@ -4633,7 +4630,3 @@ static int btrfs_cleanup_transaction(struct btrfs_fs_info *fs_info)
return 0;
}
static const struct extent_io_ops btree_extent_io_ops = {
.submit_bio_hook = NULL
};

1
fs/btrfs/extent-io-tree.h
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@ -63,7 +63,6 @@ struct extent_io_tree {
u8 owner;
spinlock_t lock;
const struct extent_io_ops *ops;
};
struct extent_state {

2
fs/btrfs/extent_io.c
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@ -281,7 +281,6 @@ void extent_io_tree_init(struct btrfs_fs_info *fs_info,
{
tree->fs_info = fs_info;
tree->state = RB_ROOT;
tree->ops = NULL;
tree->dirty_bytes = 0;
spin_lock_init(&tree->lock);
tree->private_data = private_data;
@ -3055,7 +3054,6 @@ static int submit_extent_page(unsigned int opf,
else
contig = bio_end_sector(bio) == sector;
ASSERT(tree->ops);
if (btrfs_bio_fits_in_stripe(page, page_size, bio, bio_flags))
can_merge = false;

9
fs/btrfs/extent_io.h
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@ -74,15 +74,6 @@ typedef blk_status_t (submit_bio_hook_t)(struct inode *inode, struct bio *bio,
typedef blk_status_t (extent_submit_bio_start_t)(void *private_data,
struct bio *bio, u64 bio_offset);
struct extent_io_ops {
/*
* The following callback must be always defined, the function
* pointer will be called unconditionally.
*/
submit_bio_hook_t *submit_bio_hook;
};
#define INLINE_EXTENT_BUFFER_PAGES 16
#define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE)
struct extent_buffer {

16
fs/btrfs/inode.c
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@ -71,7 +71,6 @@ static const struct inode_operations btrfs_special_inode_operations;
static const struct inode_operations btrfs_file_inode_operations;
static const struct address_space_operations btrfs_aops;
static const struct file_operations btrfs_dir_file_operations;
static const struct extent_io_ops btrfs_extent_io_ops;
static struct kmem_cache *btrfs_inode_cachep;
struct kmem_cache *btrfs_trans_handle_cachep;
@ -141,13 +140,6 @@ static inline void btrfs_cleanup_ordered_extents(struct btrfs_inode *inode,
static int btrfs_dirty_inode(struct inode *inode);
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode)
{
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
#endif
static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir,
const struct qstr *qstr)
@ -3391,7 +3383,6 @@ static int btrfs_read_locked_inode(struct inode *inode,
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
inode->i_mapping->a_ops = &btrfs_aops;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
inode->i_fop = &btrfs_file_operations;
inode->i_op = &btrfs_file_inode_operations;
break;
@ -6307,7 +6298,6 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
if (err)
goto out_unlock;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
d_instantiate_new(dentry, inode);
out_unlock:
@ -9518,7 +9508,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_fop = &btrfs_file_operations;
inode->i_op = &btrfs_file_inode_operations;
inode->i_mapping->a_ops = &btrfs_aops;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name);
if (err)
@ -9838,7 +9827,6 @@ static int btrfs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
inode->i_op = &btrfs_file_inode_operations;
inode->i_mapping->a_ops = &btrfs_aops;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
ret = btrfs_init_inode_security(trans, inode, dir, NULL);
if (ret)
@ -10256,10 +10244,6 @@ static const struct file_operations btrfs_dir_file_operations = {
.fsync = btrfs_sync_file,
};
static const struct extent_io_ops btrfs_extent_io_ops = {
.submit_bio_hook = NULL
};
/*
* btrfs doesn't support the bmap operation because swapfiles
* use bmap to make a mapping of extents in the file. They assume

1
fs/btrfs/tests/inode-tests.c
View File

@ -949,7 +949,6 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
}
BTRFS_I(inode)->root = root;
btrfs_test_inode_set_ops(inode);
/* [BTRFS_MAX_EXTENT_SIZE] */
ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0,