diff options
| -rw-r--r-- | fs/proc/inode.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 74ce4a8d05eb..fa2dc732cd77 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -108,10 +108,11 @@ void proc_prune_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock) struct inode *inode; struct proc_inode *ei; struct hlist_node *node; - struct super_block *sb; + struct super_block *old_sb = NULL; rcu_read_lock(); for (;;) { + struct super_block *sb; node = hlist_first_rcu(inodes); if (!node) break; @@ -122,23 +123,28 @@ void proc_prune_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock) inode = &ei->vfs_inode; sb = inode->i_sb; - if (!atomic_inc_not_zero(&sb->s_active)) + if ((sb != old_sb) && !atomic_inc_not_zero(&sb->s_active)) continue; inode = igrab(inode); rcu_read_unlock(); + if (sb != old_sb) { + if (old_sb) + deactivate_super(old_sb); + old_sb = sb; + } if (unlikely(!inode)) { - deactivate_super(sb); rcu_read_lock(); continue; } d_prune_aliases(inode); iput(inode); - deactivate_super(sb); rcu_read_lock(); } rcu_read_unlock(); + if (old_sb) + deactivate_super(old_sb); } static int proc_show_options(struct seq_file *seq, struct dentry *root) |