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nilfs2: cleanup multi kmem_cache_{create,destroy} code

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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>
This commit is contained in:
Li Hong
2010-04-06 00:54:11 +08:00
committed by Ryusuke Konishi
parent aaed1d5bfa
commit 41c88bd74d
7 changed files with 98 additions and 165 deletions
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40
fs/nilfs2/btree.c
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@@ -31,46 +31,6 @@
#include "alloc.h"
#include "dat.h"
/**
* 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 *);
};
/*
* B-tree path operations
*/
static struct kmem_cache *nilfs_btree_path_cache;
int __init nilfs_btree_path_cache_init(void)
{
nilfs_btree_path_cache =
kmem_cache_create("nilfs2_btree_path_cache",
sizeof(struct nilfs_btree_path) *
NILFS_BTREE_LEVEL_MAX, 0, 0, NULL);
return (nilfs_btree_path_cache != NULL) ? 0 : -ENOMEM;
}
void nilfs_btree_path_cache_destroy(void)
{
kmem_cache_destroy(nilfs_btree_path_cache);
}
static struct nilfs_btree_path *nilfs_btree_alloc_path(void)
{
struct nilfs_btree_path *path;