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f2fs: check nid == 0 in add_free_nid 

It is more obvious that add_free_nid checks whether the free nid is zero or not.

Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-04-25 13:21:12 +09:00
parent 8680441caa
commit 9198aceb53
1 changed files with 4 additions and 4 deletions
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8
fs/f2fs/node.c
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@ -1245,6 +1245,10 @@ static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
if (nm_i->fcnt > 2 * MAX_FREE_NIDS)
return 0;
/* 0 nid should not be used */
if (nid == 0)
return 0;
retry:
i = kmem_cache_alloc(free_nid_slab, GFP_NOFS);
if (!i) {
@ -1286,10 +1290,6 @@ static int scan_nat_page(struct f2fs_nm_info *nm_i,
int fcnt = 0;
int i;
/* 0 nid should not be used */
if (start_nid == 0)
++start_nid;
i = start_nid % NAT_ENTRY_PER_BLOCK;
for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {