fscrypt: Include <linux/once.h> in fs/crypto/keyring.c

Include <linux/once.h> header to allow the removal of legacy
inclusion of <linux/prandom.h> from <linux/random.h>.

Signed-off-by: Uros Bizjak <[email protected]>
Cc: Theodore Y. Ts'o <[email protected]>
Cc: Jaegeuk Kim <[email protected]>
Acked-by: Eric Biggers <[email protected]>
Signed-off-by: Jason A. Donenfeld <[email protected]>

Author: ubizjak

fs/crypto/keyring.c

@@ -22,6 +22,7 @@
 #include <crypto/skcipher.h>
 #include <linux/key-type.h>
 #include <linux/random.h>
+#include <linux/once.h>
 #include <linux/seq_file.h>
 
 #include "fscrypt_private.h"