From: Ryusuke Konishi Date: Thu, 26 Mar 2009 17:53:12 +0000 (+0900) Subject: nilfs2: fix lockdep recursive locking warning on meta data files X-Git-Tag: firefly_0821_release~14460^2~5 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c2698e50e304cd29a7836f05452359a3306a405e;p=firefly-linux-kernel-4.4.55.git 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: [] nilfs_sufile_get_stat+0x1e/0x105 [nilfs2] but task is already holding lock: (&mi->mi_sem){----}, at: [] nilfs_count_free_blocks+0x48/0x84 [nilfs2] Signed-off-by: Ryusuke Konishi --- diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index 33400cf0bbe2..7f65b3be4aa9 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));