[AF_RXRPC]: Key facility changes for AF_RXRPC

Export the keyring key type definition and document its availability.

Add alternative types into the key's type_data union to make it more useful.
Not all users necessarily want to use it as a list_head (AF_RXRPC doesn't, for
example), so make it clear that it can be used in other ways.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/key.h b/include/linux/key.h
index 169f05e4863e..a9220e75782e 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -160,6 +160,8 @@ struct key {
          */
         union {
                 struct list_head        link;
+                unsigned long           x[2];
+                void                    *p[2];
         } type_data;
 
         /* key data