Re: linux-next: manual merge of the ceph tree with Linus' tree

[Al Viro]

On Wed, Jan 11, 2012 at 12:27:44PM +1100, Stephen Rothwell wrote:
> Hi Sage,
> 
> Today's linux-next merge of the ceph tree got a conflict in
> fs/ceph/super.c between commit 3c5184ef1216 ("ceph: d_alloc_root() may
> fail") from Linus' tree and commit 26d913cdd955 ("ceph: always initialize
> the dentry in open_root_dentry()") from the ceph tree.
> 
> I fixed it up (see below) and can carry the fix as necessary.

Ahem...  

>  +			root = d_obtain_alias(inode);
>  +		}
> + 		ceph_init_dentry(root);

What will happen if dentry returned by d_obtain_alias() had already existed?
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