KEYS: Make the key matching functions return bool

Make the key matching functions pointed to by key_match_data::cmp return bool
rather than int.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 08bd533..bd536cb 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -489,8 +489,8 @@
 /*
  * See if the key we're looking at is the target key.
  */
-int lookup_user_key_possessed(const struct key *key,
-			      const struct key_match_data *match_data)
+bool lookup_user_key_possessed(const struct key *key,
+			       const struct key_match_data *match_data)
 {
 	return key == match_data->raw_data;
 }