btrfs: Remove unused variables

clear_super - usage was removed in commit cea67ab92d3d ("btrfs: clean
the old superblocks before freeing the device") but that change forgot
to remove the actual variable.

max_key - commit 6174d3cb43aa ("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 e06cd3dd7cea ("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>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index be3c34733d82ecf6013189cc48f12a8ca0dca24a..325ea062dc6b31e368199722161068f87a08a2ed 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -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);