f2fs: obsolete ALLOC_NID_LIST list

As Fan Li reported, there is no user traversing nid_list[ALLOC_NID_LIST]
which is used for tracking preallocated nids. Let's drop it, and only
track preallocated nids in free_nid_root radix-tree.

Reported-by: Fan Li <fanofcode.li@samsung.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 3 insertions, 12 deletions

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index bb53e9955ff2..e91b08b4a51a 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -150,18 +150,10 @@ struct nat_entry_set {
 	unsigned int entry_cnt;		/* the # of nat entries in set */
 };
 
-/*
- * For free nid mangement
- */
-enum nid_state {
-	NID_NEW,	/* newly added to free nid list */
-	NID_ALLOC	/* it is allocated */
-};
-
 struct free_nid {
 	struct list_head list;	/* for free node id list */
 	nid_t nid;		/* node id */
-	int state;		/* in use or not: NID_NEW or NID_ALLOC */
+	int state;		/* in use or not: FREE_NID or PREALLOC_NID */
 };
 
 static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
@@ -170,12 +162,11 @@ static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
 	struct free_nid *fnid;
 
 	spin_lock(&nm_i->nid_list_lock);
-	if (nm_i->nid_cnt[FREE_NID_LIST] <= 0) {
+	if (nm_i->nid_cnt[FREE_NID] <= 0) {
 		spin_unlock(&nm_i->nid_list_lock);
 		return;
 	}
-	fnid = list_first_entry(&nm_i->nid_list[FREE_NID_LIST],
-						struct free_nid, list);
+	fnid = list_first_entry(&nm_i->free_nid_list, struct free_nid, list);
 	*nid = fnid->nid;
 	spin_unlock(&nm_i->nid_list_lock);
 }