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authorNikolay Borisov <nborisov@suse.com>2020-09-14 12:37:05 +0300
committerDavid Sterba <dsterba@suse.com>2020-10-07 12:13:19 +0200
commit208d6341e85b4f2628a90438fce5d8a2dd97d6ba (patch)
tree250c300b031e227df903de702d0391f69de0fd6d /fs
parent0420177c08b2d86034a98d45b7d3609bdc986fd2 (diff)
btrfs: remove btree_get_extent
The sole purpose of this function was to satisfy the requirements of __do_readpage. Since that function is no longer used to read metadata pages the need to keep btree_get_extent around has also disappeared. Simply remove it. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/disk-io.c47
-rw-r--r--fs/btrfs/disk-io.h3
2 files changed, 0 insertions, 50 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0fae2caf31ef..53b588a7e150 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -205,53 +205,6 @@ void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb,
#endif
/*
- * extents on the btree inode are pretty simple, there's one extent
- * that covers the entire device
- */
-struct extent_map *btree_get_extent(struct btrfs_inode *inode,
- struct page *page, size_t pg_offset,
- u64 start, u64 len)
-{
- struct extent_map_tree *em_tree = &inode->extent_tree;
- struct extent_map *em;
- int ret;
-
- read_lock(&em_tree->lock);
- em = lookup_extent_mapping(em_tree, start, len);
- if (em) {
- read_unlock(&em_tree->lock);
- goto out;
- }
- read_unlock(&em_tree->lock);
-
- em = alloc_extent_map();
- if (!em) {
- em = ERR_PTR(-ENOMEM);
- goto out;
- }
- em->start = 0;
- em->len = (u64)-1;
- em->block_len = (u64)-1;
- em->block_start = 0;
-
- write_lock(&em_tree->lock);
- ret = add_extent_mapping(em_tree, em, 0);
- if (ret == -EEXIST) {
- free_extent_map(em);
- em = lookup_extent_mapping(em_tree, start, len);
- if (!em)
- em = ERR_PTR(-EIO);
- } else if (ret) {
- free_extent_map(em);
- em = ERR_PTR(ret);
- }
- write_unlock(&em_tree->lock);
-
-out:
- return em;
-}
-
-/*
* Compute the csum of a btree block and store the result to provided buffer.
*/
static void csum_tree_block(struct extent_buffer *buf, u8 *result)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 00dc39d47ed3..89b6a709a184 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -123,9 +123,6 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
u64 objectid);
int btree_lock_page_hook(struct page *page, void *data,
void (*flush_fn)(void *));
-struct extent_map *btree_get_extent(struct btrfs_inode *inode,
- struct page *page, size_t pg_offset,
- u64 start, u64 len);
int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags);
int __init btrfs_end_io_wq_init(void);
void __cold btrfs_end_io_wq_exit(void);