This is a relatively minor detail in the rather bigger context of this
patch, but...

> @@ -642,6 +644,7 @@ struct inode {
>       struct list_head        inotify_watches; /* watches on this inode */
>       struct mutex            inotify_mutex;  /* protects the watches list */
>  #endif
> +     wait_queue_head_t       i_revoke_wait;

That seems like a relatively hefty addition to every inode in the system
when revoke - I think - will be a fairly rare operation.  Would there be
any significant cost to using a single, global revoke-wait queue instead
of growing the inode structure?

jon
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