From 5b45d96bf963afeb931a75faf02fb424e446e5a9 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 29 Dec 2008 07:40:31 -0500 Subject: [PATCH] fix the treatment of jfs special inodes We used to put them on a single list, without any locking. Racy. Signed-off-by: Al Viro --- fs/jfs/jfs_imap.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index d6363d8309d0..0f94381ca6d0 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -58,9 +58,9 @@ /* * __mark_inode_dirty expects inodes to be hashed. Since we don't want - * special inodes in the fileset inode space, we hash them to a dummy head + * special inodes in the fileset inode space, we make them appear hashed, + * but do not put on any lists. */ -static HLIST_HEAD(aggregate_hash); /* * imap locks @@ -496,7 +496,11 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary) /* release the page */ release_metapage(mp); - hlist_add_head(&ip->i_hash, &aggregate_hash); + /* + * that will look hashed, but won't be on any list; hlist_del() + * will work fine and require no locking. + */ + ip->i_hash.pprev = &ip->i_hash.next; return (ip); }