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btrfs: Remove unused variables 

clear_super - usage was removed in commit cea67ab92d ("btrfs: clean
the old superblocks before freeing the device") but that change forgot
to remove the actual variable.

max_key - commit 6174d3cb43 ("Btrfs: remove unused max_key arg from
btrfs_search_forward") removed the max_key parameter but it forgot to
remove references from callers.

stripe_len - this one was added by e06cd3dd7c ("Btrfs: add validadtion
checks for chunk loading") but even then it wasn't used.

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 2017-07-19 10:47:57 +03:00 committed by David Sterba
parent 500ceed807
commit 110840bb62
1 changed files with 0 additions and 9 deletions
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9
fs/btrfs/volumes.c
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@ -1872,7 +1872,6 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
struct btrfs_fs_devices *cur_devices;
u64 num_devices;
int ret = 0;
bool clear_super = false;
mutex_lock(&uuid_mutex);
@ -1908,7 +1907,6 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
list_del_init(&device->dev_alloc_list);
device->fs_devices->rw_devices--;
mutex_unlock(&fs_info->chunk_mutex);
clear_super = true;
}
mutex_unlock(&uuid_mutex);
@ -4110,7 +4108,6 @@ static int btrfs_uuid_scan_kthread(void *data)
struct btrfs_fs_info *fs_info = data;
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_key key;
struct btrfs_key max_key;
struct btrfs_path *path = NULL;
int ret = 0;
struct extent_buffer *eb;
@ -4129,10 +4126,6 @@ static int btrfs_uuid_scan_kthread(void *data)
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = 0;
max_key.objectid = (u64)-1;
max_key.type = BTRFS_ROOT_ITEM_KEY;
max_key.offset = (u64)-1;
while (1) {
ret = btrfs_search_forward(root, &key, path, 0);
if (ret) {
@ -6415,7 +6408,6 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct extent_map *em;
u64 logical;
u64 length;
u64 stripe_len;
u64 devid;
u8 uuid[BTRFS_UUID_SIZE];
int num_stripes;
@ -6424,7 +6416,6 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
logical = key->offset;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);