nilfs2: Combine nilfs_btree_alloc_path() and nilfs_btree_init_path()
nilfs_btree_alloc_path() and nilfs_btree_init_path() are bound into each other
tightly. Make them into one procedure to clearify the logic and avoid some
misusages.
Signed-off-by: Li Hong <lihong.hi@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index 76c38e3..f479849 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -71,23 +71,16 @@
kmem_cache_destroy(nilfs_btree_path_cache);
}
-static inline struct nilfs_btree_path *nilfs_btree_alloc_path(void)
+static struct nilfs_btree_path *nilfs_btree_alloc_path(void)
{
- return kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS);
-}
+ struct nilfs_btree_path *path;
+ int level = NILFS_BTREE_LEVEL_DATA;
-static inline void nilfs_btree_free_path(struct nilfs_btree_path *path)
-{
- kmem_cache_free(nilfs_btree_path_cache, path);
-}
+ path = kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS);
+ if (path == NULL)
+ goto out;
-static void nilfs_btree_init_path(struct nilfs_btree_path *path)
-{
- int level;
-
- for (level = NILFS_BTREE_LEVEL_DATA;
- level < NILFS_BTREE_LEVEL_MAX;
- level++) {
+ for (; level < NILFS_BTREE_LEVEL_MAX; level++) {
path[level].bp_bh = NULL;
path[level].bp_sib_bh = NULL;
path[level].bp_index = 0;
@@ -95,6 +88,14 @@
path[level].bp_newreq.bpr_ptr = NILFS_BMAP_INVALID_PTR;
path[level].bp_op = NULL;
}
+
+out:
+ return path;
+}
+
+static inline void nilfs_btree_free_path(struct nilfs_btree_path *path)
+{
+ kmem_cache_free(nilfs_btree_path_cache, path);
}
static void nilfs_btree_release_path(struct nilfs_btree_path *path)
@@ -566,7 +567,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level);
@@ -594,7 +594,7 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
+
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level);
if (ret < 0)
goto out;
@@ -1123,7 +1123,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, NULL,
NILFS_BTREE_LEVEL_NODE_MIN);
@@ -1456,7 +1455,7 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
+
ret = nilfs_btree_do_lookup(btree, path, key, NULL,
NILFS_BTREE_LEVEL_NODE_MIN);
if (ret < 0)
@@ -1488,7 +1487,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup_last(btree, path, keyp, NULL);
@@ -1923,7 +1921,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
if (buffer_nilfs_node(bh)) {
node = (struct nilfs_btree_node *)bh->b_data;
@@ -2108,7 +2105,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
if (buffer_nilfs_node(*bh)) {
node = (struct nilfs_btree_node *)(*bh)->b_data;
@@ -2175,7 +2171,6 @@
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level + 1);
if (ret < 0) {