btrfs: Fix warning "variable ‘gen’ set but not used"

Variable 'gen' in reada_for_search() is not used since commit 58dc4ce43251
("btrfs: remove unused parameter from readahead_tree_block").  This patch
simply removes this variable.

Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index d1c56c94dd5abe2c4d007d55936699629009b604..dcd39cca7e43dbfa9e1d964b8aaedc0002e57c32 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2268,7 +2268,6 @@ static void reada_for_search(struct btrfs_root *root,
        u64 search;
        u64 target;
        u64 nread = 0;
-       u64 gen;
        struct extent_buffer *eb;
        u32 nr;
        u32 blocksize;
@@ -2313,7 +2312,6 @@ static void reada_for_search(struct btrfs_root *root,
                search = btrfs_node_blockptr(node, nr);
                if ((search <= target && target - search <= 65536) ||
                    (search > target && search - target <= 65536)) {
-                       gen = btrfs_node_ptr_generation(node, nr);
                        readahead_tree_block(root, search);
                        nread += blocksize;
                }