From: Christoph Hellwig Date: Wed, 16 Oct 2013 19:48:53 +0000 (-0400) Subject: exportfs: BUG_ON in crazy corner case X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=854ff5caabb5974b7464b438aba0bc47f1b6cf34;p=linux-beck.git exportfs: BUG_ON in crazy corner case This would indicate a nasty bug in the dcache and has never triggered in the past 10 years as far as I know. Reviewed-by: Christoph Hellwig Signed-off-by: J. Bruce Fields Signed-off-by: Al Viro --- diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index c43fe9b39ff2..6d0a7fa9abb3 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -112,18 +112,14 @@ reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf) while (target_dir->d_flags & DCACHE_DISCONNECTED && noprogress++ < 10) { struct dentry *pd = find_disconnected_root(target_dir); + BUG_ON(pd == mnt->mnt_sb->s_root); + if (!IS_ROOT(pd)) { /* must have found a connected parent - great */ spin_lock(&pd->d_lock); pd->d_flags &= ~DCACHE_DISCONNECTED; spin_unlock(&pd->d_lock); noprogress = 0; - } else if (pd == mnt->mnt_sb->s_root) { - printk(KERN_ERR "export: Eeek filesystem root is not connected, impossible\n"); - spin_lock(&pd->d_lock); - pd->d_flags &= ~DCACHE_DISCONNECTED; - spin_unlock(&pd->d_lock); - noprogress = 0; } else { /* * We have hit the top of a disconnected path, try to