diff options
| author | David Miller <davem@davemloft.net> | 2008-02-15 11:19:58 -0500 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2008-02-15 11:19:58 -0500 |
| commit | 8871a0eaa98d951727e97c615d831af9a60432ae (patch) | |
| tree | 7701fa42a830e2fba095199bfe25c62b42b9d36e /dir-item.c | |
| parent | 0c6513b1d120ba99a3d5f3641cb059723245ec00 (diff) | |
Unaligned access fixes
The first problem is that these SETGET macros lose typing information,
and therefore can't see the 'packed' attribute and therefore take
unaligned access SIGBUS signals on sparc64 when trying to derefernce
the member.
The next problem is a similar issue in btrfs_name_hash(). This gets
passed things like &key.offset which is a member of a packed
structure, losing this packed'ness information btrfs_name_hash()
performs a potentially unaligned memory access, again resulting in a
SIGBUS.
Diffstat (limited to 'dir-item.c')
| -rw-r--r-- | dir-item.c | 12 |
1 files changed, 4 insertions, 8 deletions
@@ -71,8 +71,7 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, key.objectid = dir; btrfs_set_key_type(&key, BTRFS_XATTR_ITEM_KEY); - ret = btrfs_name_hash(name, name_len, &key.offset); - BUG_ON(ret); + key.offset = btrfs_name_hash(name, name_len); path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -122,8 +121,7 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root key.objectid = dir; btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); - ret = btrfs_name_hash(name, name_len, &key.offset); - BUG_ON(ret); + key.offset = btrfs_name_hash(name, name_len); path = btrfs_alloc_path(); data_size = sizeof(*dir_item) + name_len; dir_item = insert_with_overflow(trans, root, path, &key, data_size, @@ -196,8 +194,7 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, key.objectid = dir; btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); - ret = btrfs_name_hash(name, name_len, &key.offset); - BUG_ON(ret); + key.offset = btrfs_name_hash(name, name_len); ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); if (ret < 0) @@ -258,8 +255,7 @@ struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, key.objectid = dir; btrfs_set_key_type(&key, BTRFS_XATTR_ITEM_KEY); - ret = btrfs_name_hash(name, name_len, &key.offset); - BUG_ON(ret); + key.offset = btrfs_name_hash(name, name_len); ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); if (ret < 0) return ERR_PTR(ret); |