btrfs: reada: Remove level argument in severial functions

level is not used in severial functions, remove them from arguments,
and remove relative code for get its value.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 1d00de7369a8cd0d137db0396a52bd8281c87c30..b40dbf717737689248b8cdaa40264547a817e03b 100644 (file)
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -101,7 +101,7 @@ static void reada_start_machine(struct btrfs_fs_info *fs_info);
 static void __reada_start_machine(struct btrfs_fs_info *fs_info);
 
 static int reada_add_block(struct reada_control *rc, u64 logical,
-                          struct btrfs_key *top, int level, u64 generation);
+                          struct btrfs_key *top, u64 generation);
 
 /* recurses */
 /* in case of err, eb might be NULL */
@@ -197,8 +197,7 @@ static int __readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
                        if (rec->generation == generation &&
                            btrfs_comp_cpu_keys(&key, &rc->key_end) < 0 &&
                            btrfs_comp_cpu_keys(&next_key, &rc->key_start) > 0)
-                               reada_add_block(rc, bytenr, &next_key,
-                                               level - 1, n_gen);
+                               reada_add_block(rc, bytenr, &next_key, n_gen);
                }
        }
        /*
@@ -315,7 +314,7 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
 
 static struct reada_extent *reada_find_extent(struct btrfs_root *root,
                                              u64 logical,
-                                             struct btrfs_key *top, int level)
+                                             struct btrfs_key *top)
 {
        int ret;
        struct reada_extent *re = NULL;
@@ -557,13 +556,13 @@ static void reada_control_release(struct kref *kref)
 }
 
 static int reada_add_block(struct reada_control *rc, u64 logical,
-                          struct btrfs_key *top, int level, u64 generation)
+                          struct btrfs_key *top, u64 generation)
 {
        struct btrfs_root *root = rc->root;
        struct reada_extent *re;
        struct reada_extctl *rec;
 
-       re = reada_find_extent(root, logical, top, level); /* takes one ref */
+       re = reada_find_extent(root, logical, top); /* takes one ref */
        if (!re)
                return -1;
 
@@ -916,7 +915,6 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
        struct reada_control *rc;
        u64 start;
        u64 generation;
-       int level;
        int ret;
        struct extent_buffer *node;
        static struct btrfs_key max_key = {
@@ -939,11 +937,10 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
 
        node = btrfs_root_node(root);
        start = node->start;
-       level = btrfs_header_level(node);
        generation = btrfs_header_generation(node);
        free_extent_buffer(node);
 
-       ret = reada_add_block(rc, start, &max_key, level, generation);
+       ret = reada_add_block(rc, start, &max_key, generation);
        if (ret) {
                kfree(rc);
                return ERR_PTR(ret);