Miao Xie
2010-Mar-25 12:30 UTC
[PATCH 06/18] Btrfs: Remove unnecessary variant in __tree_search
From: Zhao Lei <zhaolei@cn.fujitsu.com>
"prev_entry"''s value is same as "entry" in
reference.
We can use "entry" only in these function without readability impact.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
fs/btrfs/extent_map.c | 14 ++++++--------
fs/btrfs/ordered-data.c | 16 +++++++---------
2 files changed, 13 insertions(+), 17 deletions(-)
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 5a01f35..9f83eab 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -116,13 +116,11 @@ static struct rb_node *__tree_search(struct rb_root *root,
u64 offset,
struct rb_node *n = root->rb_node;
struct rb_node *prev = NULL;
struct rb_node *orig_prev = NULL;
- struct extent_map *entry;
- struct extent_map *prev_entry = NULL;
+ struct extent_map *entry = NULL;
while (n) {
entry = rb_entry(n, struct extent_map, rb_node);
prev = n;
- prev_entry = entry;
WARN_ON(!entry->in_tree);
@@ -136,19 +134,19 @@ static struct rb_node *__tree_search(struct rb_root *root,
u64 offset,
if (prev_ret) {
orig_prev = prev;
- while (prev && offset >= extent_map_end(prev_entry)) {
+ while (prev && offset >= extent_map_end(entry)) {
prev = rb_next(prev);
- prev_entry = rb_entry(prev, struct extent_map, rb_node);
+ entry = rb_entry(prev, struct extent_map, rb_node);
}
*prev_ret = prev;
prev = orig_prev;
}
if (next_ret) {
- prev_entry = rb_entry(prev, struct extent_map, rb_node);
- while (prev && offset < prev_entry->start) {
+ entry = rb_entry(prev, struct extent_map, rb_node);
+ while (prev && offset < entry->start) {
prev = rb_prev(prev);
- prev_entry = rb_entry(prev, struct extent_map, rb_node);
+ entry = rb_entry(prev, struct extent_map, rb_node);
}
*next_ret = prev;
}
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index a8ffecd..2d221a4 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -70,13 +70,11 @@ static struct rb_node *__tree_search(struct rb_root *root,
u64 file_offset,
struct rb_node *n = root->rb_node;
struct rb_node *prev = NULL;
struct rb_node *test;
- struct btrfs_ordered_extent *entry;
- struct btrfs_ordered_extent *prev_entry = NULL;
+ struct btrfs_ordered_extent *entry = NULL;
while (n) {
entry = rb_entry(n, struct btrfs_ordered_extent, rb_node);
prev = n;
- prev_entry = entry;
if (file_offset < entry->file_offset)
n = n->rb_left;
@@ -88,25 +86,25 @@ static struct rb_node *__tree_search(struct rb_root *root,
u64 file_offset,
if (!prev_ret)
return NULL;
- while (prev && file_offset >= entry_end(prev_entry)) {
+ while (prev && file_offset >= entry_end(entry)) {
test = rb_next(prev);
if (!test)
break;
- prev_entry = rb_entry(test, struct btrfs_ordered_extent,
+ entry = rb_entry(test, struct btrfs_ordered_extent,
rb_node);
- if (file_offset < entry_end(prev_entry))
+ if (file_offset < entry_end(entry))
break;
prev = test;
}
if (prev)
- prev_entry = rb_entry(prev, struct btrfs_ordered_extent,
+ entry = rb_entry(prev, struct btrfs_ordered_extent,
rb_node);
- while (prev && file_offset < entry_end(prev_entry)) {
+ while (prev && file_offset < entry_end(entry)) {
test = rb_prev(prev);
if (!test)
break;
- prev_entry = rb_entry(test, struct btrfs_ordered_extent,
+ entry = rb_entry(test, struct btrfs_ordered_extent,
rb_node);
prev = test;
}
--
1.6.5.2
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