[PATCH 4/7] proc: Use d_invalidate in proc_prune_siblings_dcache

[Al Viro]

On Thu, Feb 20, 2020 at 02:49:53PM -0600, Eric W. Biederman wrote:
> 
> The function d_prune_aliases has the problem that it will only prune
> aliases thare are completely unused.  It will not remove aliases for
> the dcache or even think of removing mounts from the dcache.  For that
> behavior d_invalidate is needed.
> 
> To use d_invalidate replace d_prune_aliases with d_find_alias
> followed by d_invalidate and dput.  This is safe and complete
> because no inode in proc has any hardlinks or aliases.

s/no inode.*/it's a fucking directory inode./