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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-03-27 02:53:12 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-04-13 09:53:50 +0900
commitc2698e50e304cd29a7836f05452359a3306a405e (patch)
tree5d376538eb2937a7481c1303152e3b450049a7df
parentbcb48891b05b4179edc86298d3dccb2ce90d5413 (diff)
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nilfs2: fix lockdep recursive locking warning on meta data files
This fixes the following false detection of lockdep against nilfs meta data files: ============================================= [ INFO: possible recursive locking detected ] 2.6.29 #26 --------------------------------------------- mount.nilfs2/4185 is trying to acquire lock: (&mi->mi_sem){----}, at: [<d0c7925b>] nilfs_sufile_get_stat+0x1e/0x105 [nilfs2] but task is already holding lock: (&mi->mi_sem){----}, at: [<d0c72026>] nilfs_count_free_blocks+0x48/0x84 [nilfs2] Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
-rw-r--r--fs/nilfs2/the_nilfs.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 33400cf0bbe..7f65b3be4aa 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -115,6 +115,7 @@ void put_nilfs(struct the_nilfs *nilfs)
static int nilfs_load_super_root(struct the_nilfs *nilfs,
struct nilfs_sb_info *sbi, sector_t sr_block)
{
+ static struct lock_class_key dat_lock_key;
struct buffer_head *bh_sr;
struct nilfs_super_root *raw_sr;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
@@ -163,6 +164,9 @@ static int nilfs_load_super_root(struct the_nilfs *nilfs,
if (unlikely(err))
goto failed_sufile;
+ lockdep_set_class(&NILFS_MDT(nilfs->ns_dat)->mi_sem, &dat_lock_key);
+ lockdep_set_class(&NILFS_MDT(nilfs->ns_gc_dat)->mi_sem, &dat_lock_key);
+
nilfs_mdt_set_shadow(nilfs->ns_dat, nilfs->ns_gc_dat);
nilfs_mdt_set_entry_size(nilfs->ns_cpfile, checkpoint_size,
sizeof(struct nilfs_cpfile_header));