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path: root/fs/btrfs/extent_io.c
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Diffstat (limited to 'fs/btrfs/extent_io.c')
-rw-r--r--fs/btrfs/extent_io.c20
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 7380449cb5b3..9965993748d0 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -97,7 +97,6 @@ void extent_io_tree_init(struct extent_io_tree *tree,
spin_lock_init(&tree->lock);
spin_lock_init(&tree->buffer_lock);
tree->mapping = mapping;
- tree->last = NULL;
}
EXPORT_SYMBOL(extent_io_tree_init);
@@ -173,12 +172,6 @@ static struct rb_node *__etree_search(struct extent_io_tree *tree, u64 offset,
struct tree_entry *entry;
struct tree_entry *prev_entry = NULL;
- if (tree->last) {
- struct extent_state *state;
- state = tree->last;
- if (state->start <= offset && offset <= state->end)
- return &tree->last->rb_node;
- }
while(n) {
entry = rb_entry(n, struct tree_entry, rb_node);
prev = n;
@@ -189,7 +182,6 @@ static struct rb_node *__etree_search(struct extent_io_tree *tree, u64 offset,
else if (offset > entry->end)
n = n->rb_right;
else {
- tree->last = rb_entry(n, struct extent_state, rb_node);
return n;
}
}
@@ -223,10 +215,6 @@ static inline struct rb_node *tree_search(struct extent_io_tree *tree,
ret = __etree_search(tree, offset, &prev, NULL);
if (!ret) {
- if (prev) {
- tree->last = rb_entry(prev, struct extent_state,
- rb_node);
- }
return prev;
}
return ret;
@@ -301,8 +289,6 @@ static int merge_state(struct extent_io_tree *tree,
other->state == state->state) {
state->start = other->start;
other->tree = NULL;
- if (tree->last == other)
- tree->last = state;
rb_erase(&other->rb_node, &tree->state);
free_extent_state(other);
}
@@ -314,8 +300,6 @@ static int merge_state(struct extent_io_tree *tree,
other->state == state->state) {
other->start = state->start;
state->tree = NULL;
- if (tree->last == state)
- tree->last = other;
rb_erase(&state->rb_node, &tree->state);
free_extent_state(state);
}
@@ -378,7 +362,6 @@ static int insert_state(struct extent_io_tree *tree,
return -EEXIST;
}
state->tree = tree;
- tree->last = state;
merge_state(tree, state);
return 0;
}
@@ -444,9 +427,6 @@ static int clear_state_bit(struct extent_io_tree *tree,
if (delete || state->state == 0) {
if (state->tree) {
clear_state_cb(tree, state, state->state);
- if (tree->last == state) {
- tree->last = extent_state_next(state);
- }
rb_erase(&state->rb_node, &tree->state);
state->tree = NULL;
free_extent_state(state);