[PATCH] [13/23] BTRFS: Clean up unused variables -- nonbugs

From: Andi Kleen
Date: Thu Jun 10 2010 - 07:13:35 EST


These are all the cases where a variable is set, but not
read which are not bugs as far as I can see, but simply
leftovers.

Still needs more review.

Found by gcc 4.6's new warnings

Cc: chris.mason@xxxxxxxxxx
Cc: linux-btrfs@xxxxxxxxxxxxxxx

fs/btrfs/compression.c | 2 --
fs/btrfs/ctree.c | 20 ++------------------
fs/btrfs/dir-item.c | 2 +-
fs/btrfs/disk-io.c | 10 ----------
fs/btrfs/extent-tree.c | 2 --
fs/btrfs/extent_io.c | 10 ++--------
fs/btrfs/inode.c | 19 +++----------------
fs/btrfs/ioctl.c | 2 --
fs/btrfs/ordered-data.c | 2 --
fs/btrfs/relocation.c | 2 ++
fs/btrfs/root-tree.c | 2 --
fs/btrfs/super.c | 1 +
fs/btrfs/tree-defrag.c | 2 --
fs/btrfs/tree-log.c | 15 +--------------
fs/btrfs/volumes.c | 4 ----
fs/btrfs/xattr.c | 2 --
fs/btrfs/zlib.c | 5 -----

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

---
fs/btrfs/compression.c | 2 --
fs/btrfs/ctree.c | 20 ++------------------
fs/btrfs/disk-io.c | 11 -----------
fs/btrfs/extent-tree.c | 2 --
fs/btrfs/extent_io.c | 9 ---------
fs/btrfs/inode.c | 14 --------------
fs/btrfs/ioctl.c | 2 --
fs/btrfs/ordered-data.c | 2 --
fs/btrfs/root-tree.c | 2 --
fs/btrfs/super.c | 6 ++----
fs/btrfs/tree-defrag.c | 2 --
fs/btrfs/tree-log.c | 15 ---------------
fs/btrfs/volumes.c | 4 ----
fs/btrfs/xattr.c | 2 --
fs/btrfs/zlib.c | 5 -----
15 files changed, 4 insertions(+), 94 deletions(-)

Index: linux-2.6.35-rc2-gcc/fs/btrfs/ctree.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/ctree.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/ctree.c
@@ -200,7 +200,6 @@ int btrfs_copy_root(struct btrfs_trans_h
struct extent_buffer **cow_ret, u64 new_root_objectid)
{
struct extent_buffer *cow;
- u32 nritems;
int ret = 0;
int level;
struct btrfs_disk_key disk_key;
@@ -210,7 +209,6 @@ int btrfs_copy_root(struct btrfs_trans_h
WARN_ON(root->ref_cows && trans->transid != root->last_trans);

level = btrfs_header_level(buf);
- nritems = btrfs_header_nritems(buf);
if (level == 0)
btrfs_item_key(buf, &disk_key, 0);
else
@@ -1008,7 +1006,6 @@ static noinline int balance_level(struct
int wret;
int pslot;
int orig_slot = path->slots[level];
- int err_on_enospc = 0;
u64 orig_ptr;

if (level == 0)
@@ -1071,8 +1068,7 @@ static noinline int balance_level(struct
BTRFS_NODEPTRS_PER_BLOCK(root) / 4)
return 0;

- if (btrfs_header_nritems(mid) < 2)
- err_on_enospc = 1;
+ btrfs_header_nritems(mid);

left = read_node_slot(root, parent, pslot - 1);
if (left) {
@@ -1103,8 +1099,7 @@ static noinline int balance_level(struct
wret = push_node_left(trans, root, left, mid, 1);
if (wret < 0)
ret = wret;
- if (btrfs_header_nritems(mid) < 2)
- err_on_enospc = 1;
+ btrfs_header_nritems(mid);
}

/*
@@ -1224,14 +1219,12 @@ static noinline int push_nodes_for_inser
int wret;
int pslot;
int orig_slot = path->slots[level];
- u64 orig_ptr;

if (level == 0)
return 1;

mid = path->nodes[level];
WARN_ON(btrfs_header_generation(mid) != trans->transid);
- orig_ptr = btrfs_node_blockptr(mid, orig_slot);

if (level < BTRFS_MAX_LEVEL - 1)
parent = path->nodes[level + 1];
@@ -2534,7 +2527,6 @@ static noinline int __push_leaf_left(str
{
struct btrfs_disk_key disk_key;
struct extent_buffer *right = path->nodes[0];
- int slot;
int i;
int push_space = 0;
int push_items = 0;
@@ -2546,8 +2538,6 @@ static noinline int __push_leaf_left(str
u32 this_item_size;
u32 old_left_item_size;

- slot = path->slots[1];
-
if (empty)
nr = right_nritems;
else
@@ -3239,7 +3229,6 @@ int btrfs_truncate_item(struct btrfs_tra
{
int ret = 0;
int slot;
- int slot_orig;
struct extent_buffer *leaf;
struct btrfs_item *item;
u32 nritems;
@@ -3249,7 +3238,6 @@ int btrfs_truncate_item(struct btrfs_tra
unsigned int size_diff;
int i;

- slot_orig = path->slots[0];
leaf = path->nodes[0];
slot = path->slots[0];

@@ -3354,7 +3342,6 @@ int btrfs_extend_item(struct btrfs_trans
{
int ret = 0;
int slot;
- int slot_orig;
struct extent_buffer *leaf;
struct btrfs_item *item;
u32 nritems;
@@ -3363,7 +3350,6 @@ int btrfs_extend_item(struct btrfs_trans
unsigned int old_size;
int i;

- slot_orig = path->slots[0];
leaf = path->nodes[0];

nritems = btrfs_header_nritems(leaf);
@@ -3696,7 +3682,6 @@ int btrfs_insert_empty_items(struct btrf
struct btrfs_key *cpu_key, u32 *data_size,
int nr)
{
- struct extent_buffer *leaf;
int ret = 0;
int slot;
int i;
@@ -3713,7 +3698,6 @@ int btrfs_insert_empty_items(struct btrf
if (ret < 0)
goto out;

- leaf = path->nodes[0];
slot = path->slots[0];
BUG_ON(slot < 0);

Index: linux-2.6.35-rc2-gcc/fs/btrfs/super.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/super.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/super.c
@@ -61,6 +61,8 @@ static void btrfs_put_super(struct super

ret = close_ctree(root);
sb->s_fs_info = NULL;
+
+ (void)ret; /* FIXME: need to fix VFS to return error? */
}

enum {
@@ -434,7 +436,6 @@ static int btrfs_fill_super(struct super
{
struct inode *inode;
struct dentry *root_dentry;
- struct btrfs_super_block *disk_super;
struct btrfs_root *tree_root;
struct btrfs_key key;
int err;
@@ -456,7 +457,6 @@ static int btrfs_fill_super(struct super
return PTR_ERR(tree_root);
}
sb->s_fs_info = tree_root;
- disk_super = &tree_root->fs_info->super_copy;

key.objectid = BTRFS_FIRST_FREE_OBJECTID;
key.type = BTRFS_INODE_ITEM_KEY;
@@ -569,7 +569,6 @@ static int btrfs_get_sb(struct file_syst
char *subvol_name = NULL;
u64 subvol_objectid = 0;
int error = 0;
- int found = 0;

if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
@@ -605,7 +604,6 @@ static int btrfs_get_sb(struct file_syst
goto error_close_devices;
}

- found = 1;
btrfs_close_devices(fs_devices);
} else {
char b[BDEVNAME_SIZE];
Index: linux-2.6.35-rc2-gcc/fs/btrfs/disk-io.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/disk-io.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/disk-io.c
@@ -338,7 +338,6 @@ static int csum_dirty_buffer(struct btrf
struct extent_io_tree *tree;
u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 found_start;
- int found_level;
unsigned long len;
struct extent_buffer *eb;
int ret;
@@ -369,8 +368,6 @@ static int csum_dirty_buffer(struct btrf
WARN_ON(1);
goto err;
}
- found_level = btrfs_header_level(eb);
-
csum_tree_block(root, eb, 0);
err:
free_extent_buffer(eb);
@@ -533,11 +530,9 @@ int btrfs_congested_async(struct btrfs_f

static void run_one_async_start(struct btrfs_work *work)
{
- struct btrfs_fs_info *fs_info;
struct async_submit_bio *async;

async = container_of(work, struct async_submit_bio, work);
- fs_info = BTRFS_I(async->inode)->root->fs_info;
async->submit_bio_start(async->inode, async->rw, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
@@ -850,12 +845,8 @@ struct extent_buffer *read_tree_block(st
u32 blocksize, u64 parent_transid)
{
struct extent_buffer *buf = NULL;
- struct inode *btree_inode = root->fs_info->btree_inode;
- struct extent_io_tree *io_tree;
int ret;

- io_tree = &BTRFS_I(btree_inode)->io_tree;
-
buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
if (!buf)
return NULL;
@@ -1377,7 +1368,6 @@ static int bio_ready_for_csum(struct bio
u64 start = 0;
struct page *page;
struct extent_io_tree *io_tree = NULL;
- struct btrfs_fs_info *info = NULL;
struct bio_vec *bvec;
int i;
int ret;
@@ -1396,7 +1386,6 @@ static int bio_ready_for_csum(struct bio
buf_len = page->private >> 2;
start = page_offset(page) + bvec->bv_offset;
io_tree = &BTRFS_I(page->mapping->host)->io_tree;
- info = BTRFS_I(page->mapping->host)->root->fs_info;
}
/* are we fully contained in this bio? */
if (buf_len <= length)
Index: linux-2.6.35-rc2-gcc/fs/btrfs/extent-tree.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/extent-tree.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/extent-tree.c
@@ -5420,7 +5420,6 @@ static noinline void reada_walk_down(str
u64 generation;
u64 refs;
u64 flags;
- u64 last = 0;
u32 nritems;
u32 blocksize;
struct btrfs_key key;
@@ -5488,7 +5487,6 @@ reada:
generation);
if (ret)
break;
- last = bytenr + blocksize;
nread++;
}
wc->reada_slot = slot;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/root-tree.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/root-tree.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/root-tree.c
@@ -181,7 +181,6 @@ int btrfs_insert_root(struct btrfs_trans
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid)
{
struct btrfs_root *dead_root;
- struct btrfs_item *item;
struct btrfs_root_item *ri;
struct btrfs_key key;
struct btrfs_key found_key;
@@ -214,7 +213,6 @@ again:
nritems = btrfs_header_nritems(leaf);
slot = path->slots[0];
}
- item = btrfs_item_nr(leaf, slot);
btrfs_item_key_to_cpu(leaf, &key, slot);
if (btrfs_key_type(&key) != BTRFS_ROOT_ITEM_KEY)
goto next;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/compression.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/compression.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/compression.c
@@ -163,7 +163,6 @@ fail:
*/
static void end_compressed_bio_read(struct bio *bio, int err)
{
- struct extent_io_tree *tree;
struct compressed_bio *cb = bio->bi_private;
struct inode *inode;
struct page *page;
@@ -187,7 +186,6 @@ static void end_compressed_bio_read(stru
/* ok, we're the last bio for this extent, lets start
* the decompression.
*/
- tree = &BTRFS_I(inode)->io_tree;
ret = btrfs_zlib_decompress_biovec(cb->compressed_pages,
cb->start,
cb->orig_bio->bi_io_vec,
Index: linux-2.6.35-rc2-gcc/fs/btrfs/extent_io.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/extent_io.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/extent_io.c
@@ -1901,10 +1901,8 @@ static int submit_one_bio(int rw, struct
struct page *page = bvec->bv_page;
struct extent_io_tree *tree = bio->bi_private;
u64 start;
- u64 end;

start = ((u64)page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset;
- end = start + bvec->bv_len - 1;

bio->bi_private = NULL;

@@ -2204,7 +2202,6 @@ static int __extent_writepage(struct pag
u64 last_byte = i_size_read(inode);
u64 block_start;
u64 iosize;
- u64 unlock_start;
sector_t sector;
struct extent_state *cached_state = NULL;
struct extent_map *em;
@@ -2329,7 +2326,6 @@ static int __extent_writepage(struct pag
if (tree->ops && tree->ops->writepage_end_io_hook)
tree->ops->writepage_end_io_hook(page, start,
page_end, NULL, 1);
- unlock_start = page_end + 1;
goto done;
}

@@ -2340,7 +2336,6 @@ static int __extent_writepage(struct pag
if (tree->ops && tree->ops->writepage_end_io_hook)
tree->ops->writepage_end_io_hook(page, cur,
page_end, NULL, 1);
- unlock_start = page_end + 1;
break;
}
em = epd->get_extent(inode, page, pg_offset, cur,
@@ -2387,7 +2382,6 @@ static int __extent_writepage(struct pag

cur += iosize;
pg_offset += iosize;
- unlock_start = cur;
continue;
}
/* leave this out until we have a page_mkwrite call */
@@ -2473,7 +2467,6 @@ static int extent_write_cache_pages(stru
pgoff_t index;
pgoff_t end; /* Inclusive */
int scanned = 0;
- int range_whole = 0;

pagevec_init(&pvec, 0);
if (wbc->range_cyclic) {
@@ -2482,8 +2475,6 @@ static int extent_write_cache_pages(stru
} else {
index = wbc->range_start >> PAGE_CACHE_SHIFT;
end = wbc->range_end >> PAGE_CACHE_SHIFT;
- if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
- range_whole = 1;
scanned = 1;
}
retry:
Index: linux-2.6.35-rc2-gcc/fs/btrfs/inode.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/inode.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/inode.c
@@ -319,8 +319,6 @@ static noinline int compress_file_range(
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
u64 num_bytes;
- u64 orig_start;
- u64 disk_num_bytes;
u64 blocksize = root->sectorsize;
u64 actual_end;
u64 isize = i_size_read(inode);
@@ -335,8 +333,6 @@ static noinline int compress_file_range(
int i;
int will_compress;

- orig_start = start;
-
actual_end = min_t(u64, isize, end + 1);
again:
will_compress = 0;
@@ -371,7 +367,6 @@ again:
total_compressed = min(total_compressed, max_uncompressed);
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
num_bytes = max(blocksize, num_bytes);
- disk_num_bytes = num_bytes;
total_in = 0;
ret = 0;

@@ -467,7 +462,6 @@ again:
if (total_compressed >= total_in) {
will_compress = 0;
} else {
- disk_num_bytes = total_compressed;
num_bytes = total_in;
}
}
@@ -757,8 +751,6 @@ static noinline int cow_file_range(struc
u64 disk_num_bytes;
u64 cur_alloc_size;
u64 blocksize = root->sectorsize;
- u64 actual_end;
- u64 isize = i_size_read(inode);
struct btrfs_key ins;
struct extent_map *em;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
@@ -769,8 +761,6 @@ static noinline int cow_file_range(struc
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;

- actual_end = min_t(u64, isize, end + 1);
-
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
num_bytes = max(blocksize, num_bytes);
disk_num_bytes = num_bytes;
@@ -2237,7 +2227,6 @@ void btrfs_orphan_cleanup(struct btrfs_r
{
struct btrfs_path *path;
struct extent_buffer *leaf;
- struct btrfs_item *item;
struct btrfs_key key, found_key;
struct btrfs_trans_handle *trans;
struct inode *inode;
@@ -2275,7 +2264,6 @@ void btrfs_orphan_cleanup(struct btrfs_r

/* pull out the item */
leaf = path->nodes[0];
- item = btrfs_item_nr(leaf, path->slots[0]);
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);

/* make sure the item matches what we want */
@@ -5640,7 +5628,6 @@ static void btrfs_submit_direct(int rw,
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_dio_private *dip;
struct bio_vec *bvec = bio->bi_io_vec;
- u64 start;
int skip_sum;
int write = rw & (1 << BIO_RW);
int ret = 0;
@@ -5666,7 +5653,6 @@ static void btrfs_submit_direct(int rw,
dip->inode = inode;
dip->logical_offset = file_offset;

- start = dip->logical_offset;
dip->bytes = 0;
do {
dip->bytes += bvec->bv_len;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/ioctl.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/ioctl.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/ioctl.c
@@ -708,7 +708,6 @@ static noinline int btrfs_ioctl_resize(s
char *sizestr;
char *devstr = NULL;
int ret = 0;
- int namelen;
int mod = 0;

if (root->fs_info->sb->s_flags & MS_RDONLY)
@@ -722,7 +721,6 @@ static noinline int btrfs_ioctl_resize(s
return PTR_ERR(vol_args);

vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
- namelen = strlen(vol_args->name);

mutex_lock(&root->fs_info->volume_mutex);
sizestr = vol_args->name;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/ordered-data.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/ordered-data.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/ordered-data.c
@@ -526,7 +526,6 @@ int btrfs_wait_ordered_range(struct inod
{
u64 end;
u64 orig_end;
- u64 wait_end;
struct btrfs_ordered_extent *ordered;
int found;

@@ -537,7 +536,6 @@ int btrfs_wait_ordered_range(struct inod
if (orig_end > INT_LIMIT(loff_t))
orig_end = INT_LIMIT(loff_t);
}
- wait_end = orig_end;
again:
/* start IO across the range first to instantiate any delalloc
* extents
Index: linux-2.6.35-rc2-gcc/fs/btrfs/tree-defrag.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/tree-defrag.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/tree-defrag.c
@@ -36,7 +36,6 @@ int btrfs_defrag_leaves(struct btrfs_tra
int ret = 0;
int wret;
int level;
- int orig_level;
int is_extent = 0;
int next_key_ret = 0;
u64 last_ret = 0;
@@ -64,7 +63,6 @@ int btrfs_defrag_leaves(struct btrfs_tra
return -ENOMEM;

level = btrfs_header_level(root->node);
- orig_level = level;

if (level == 0)
goto out;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/tree-log.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/tree-log.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/tree-log.c
@@ -786,7 +786,6 @@ static noinline int add_inode_ref(struct
{
struct inode *dir;
int ret;
- struct btrfs_key location;
struct btrfs_inode_ref *ref;
struct btrfs_dir_item *di;
struct inode *inode;
@@ -795,10 +794,6 @@ static noinline int add_inode_ref(struct
unsigned long ref_ptr;
unsigned long ref_end;

- location.objectid = key->objectid;
- location.type = BTRFS_INODE_ITEM_KEY;
- location.offset = 0;
-
/*
* it is possible that we didn't log all the parent directories
* for a given inode. If we don't find the dir, just don't
@@ -1583,7 +1578,6 @@ static int replay_one_buffer(struct btrf
struct btrfs_path *path;
struct btrfs_root *root = wc->replay_dest;
struct btrfs_key key;
- u32 item_size;
int level;
int i;
int ret;
@@ -1601,7 +1595,6 @@ static int replay_one_buffer(struct btrf
nritems = btrfs_header_nritems(eb);
for (i = 0; i < nritems; i++) {
btrfs_item_key_to_cpu(eb, &key, i);
- item_size = btrfs_item_size_nr(eb, i);

/* inode keys are done during the first stage */
if (key.type == BTRFS_INODE_ITEM_KEY &&
@@ -1668,7 +1661,6 @@ static noinline int walk_down_log_tree(s
struct walk_control *wc)
{
u64 root_owner;
- u64 root_gen;
u64 bytenr;
u64 ptr_gen;
struct extent_buffer *next;
@@ -1698,7 +1690,6 @@ static noinline int walk_down_log_tree(s

parent = path->nodes[*level];
root_owner = btrfs_header_owner(parent);
- root_gen = btrfs_header_generation(parent);

next = btrfs_find_create_tree_block(root, bytenr, blocksize);

@@ -1749,7 +1740,6 @@ static noinline int walk_up_log_tree(str
struct walk_control *wc)
{
u64 root_owner;
- u64 root_gen;
int i;
int slot;
int ret;
@@ -1757,8 +1747,6 @@ static noinline int walk_up_log_tree(str
for (i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) {
slot = path->slots[i];
if (slot + 1 < btrfs_header_nritems(path->nodes[i])) {
- struct extent_buffer *node;
- node = path->nodes[i];
path->slots[i]++;
*level = i;
WARN_ON(*level == 0);
@@ -1771,7 +1759,6 @@ static noinline int walk_up_log_tree(str
parent = path->nodes[*level + 1];

root_owner = btrfs_header_owner(parent);
- root_gen = btrfs_header_generation(parent);
wc->process_func(root, path->nodes[*level], wc,
btrfs_header_generation(path->nodes[*level]));
if (wc->free) {
@@ -2729,7 +2716,6 @@ static int btrfs_log_inode(struct btrfs_
struct btrfs_key max_key;
struct btrfs_root *log = root->log_root;
struct extent_buffer *src = NULL;
- u32 size;
int err = 0;
int ret;
int nritems;
@@ -2793,7 +2779,6 @@ again:
break;

src = path->nodes[0];
- size = btrfs_item_size_nr(src, path->slots[0]);
if (ins_nr && ins_start_slot + ins_nr == path->slots[0]) {
ins_nr++;
goto next_slot;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/volumes.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/volumes.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/volumes.c
@@ -1901,7 +1901,6 @@ int btrfs_balance(struct btrfs_root *dev
u64 size_to_free;
struct btrfs_path *path;
struct btrfs_key key;
- struct btrfs_chunk *chunk;
struct btrfs_root *chunk_root = dev_root->fs_info->chunk_root;
struct btrfs_trans_handle *trans;
struct btrfs_key found_key;
@@ -1965,9 +1964,6 @@ int btrfs_balance(struct btrfs_root *dev
if (found_key.objectid != key.objectid)
break;

- chunk = btrfs_item_ptr(path->nodes[0],
- path->slots[0],
- struct btrfs_chunk);
/* chunk zero is special */
if (found_key.offset == 0)
break;
Index: linux-2.6.35-rc2-gcc/fs/btrfs/xattr.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/xattr.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/xattr.c
@@ -178,7 +178,6 @@ ssize_t btrfs_listxattr(struct dentry *d
struct inode *inode = dentry->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_path *path;
- struct btrfs_item *item;
struct extent_buffer *leaf;
struct btrfs_dir_item *di;
int ret = 0, slot, advance;
@@ -234,7 +233,6 @@ ssize_t btrfs_listxattr(struct dentry *d
}
advance = 1;

- item = btrfs_item_nr(leaf, slot);
btrfs_item_key_to_cpu(leaf, &found_key, slot);

/* check to make sure this item is what we want */
Index: linux-2.6.35-rc2-gcc/fs/btrfs/zlib.c
===================================================================
--- linux-2.6.35-rc2-gcc.orig/fs/btrfs/zlib.c
+++ linux-2.6.35-rc2-gcc/fs/btrfs/zlib.c
@@ -199,8 +199,6 @@ int btrfs_zlib_compress_pages(struct add
int nr_pages = 0;
struct page *in_page = NULL;
struct page *out_page = NULL;
- int out_written = 0;
- int in_read = 0;
unsigned long bytes_left;

*out_pages = 0;
@@ -233,9 +231,6 @@ int btrfs_zlib_compress_pages(struct add
workspace->def_strm.avail_out = PAGE_CACHE_SIZE;
workspace->def_strm.avail_in = min(len, PAGE_CACHE_SIZE);

- out_written = 0;
- in_read = 0;
-
while (workspace->def_strm.total_in < len) {
ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH);
if (ret != Z_OK) {
--
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