[PATCH] gfp flags annotations - part 1

- added typedef unsigned int __nocast gfp_t;

 - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
   the same warnings as far as sparse is concerned, doesn't change
   generated code (from gcc point of view we replaced unsigned int with
   typedef) and documents what's going on far better.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

net/rxrpc/connection.c

@@ -522,7 +522,7 @@ int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
 		      uint8_t type,
 		      int dcount,
 		      struct kvec diov[],
-		      unsigned int __nocast alloc_flags,
+		      gfp_t alloc_flags,
 		      struct rxrpc_message **_msg)
 {
 	struct rxrpc_message *msg;