nilfs2: cleanup multi kmem_cache_{create,destroy} code
This cleanup patch gives several improvements:
- Moving all kmem_cache_{create_destroy} calls into one place, which removes
some small function calls, cleans up error check code and clarify the logic.
- Mark all initial code in __init section.
- Remove some very obvious comments.
- Adjust some declarations.
- Fix some space-tab issues.
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.h b/fs/nilfs2/btree.h
index 4b82d84..af638d5 100644
--- a/fs/nilfs2/btree.h
+++ b/fs/nilfs2/btree.h
@@ -30,9 +30,6 @@
#include "btnode.h"
#include "bmap.h"
-struct nilfs_btree;
-struct nilfs_btree_path;
-
/**
* struct nilfs_btree - B-tree structure
* @bt_bmap: bmap base structure
@@ -41,6 +38,25 @@
struct nilfs_bmap bt_bmap;
};
+/**
+ * struct nilfs_btree_path - A path on which B-tree operations are executed
+ * @bp_bh: buffer head of node block
+ * @bp_sib_bh: buffer head of sibling node block
+ * @bp_index: index of child node
+ * @bp_oldreq: ptr end request for old ptr
+ * @bp_newreq: ptr alloc request for new ptr
+ * @bp_op: rebalance operation
+ */
+struct nilfs_btree_path {
+ struct buffer_head *bp_bh;
+ struct buffer_head *bp_sib_bh;
+ int bp_index;
+ union nilfs_bmap_ptr_req bp_oldreq;
+ union nilfs_bmap_ptr_req bp_newreq;
+ struct nilfs_btnode_chkey_ctxt bp_ctxt;
+ void (*bp_op)(struct nilfs_btree *, struct nilfs_btree_path *,
+ int, __u64 *, __u64 *);
+};
#define NILFS_BTREE_ROOT_SIZE NILFS_BMAP_SIZE
#define NILFS_BTREE_ROOT_NCHILDREN_MAX \
@@ -57,6 +73,7 @@
#define NILFS_BTREE_KEY_MIN ((__u64)0)
#define NILFS_BTREE_KEY_MAX (~(__u64)0)
+extern struct kmem_cache *nilfs_btree_path_cache;
int nilfs_btree_path_cache_init(void);
void nilfs_btree_path_cache_destroy(void);
