target/linux/generic/backport-5.4/080-wireguard-0070-crypto-lib-chacha20poly1305-define-empty-module-exit.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Fri, 15 Jan 2021 20:30:12 +0100
Subject: [PATCH] crypto: lib/chacha20poly1305 - define empty module exit
 function

commit ac88c322d0f2917d41d13553c69e9d7f043c8b6f upstream.

With no mod_exit function, users are unable to unload the module after
use. I'm not aware of any reason why module unloading should be
prohibited for this one, so this commit simply adds an empty exit
function.

Reported-and-tested-by: John Donnelly <john.p.donnelly@oracle.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 lib/crypto/chacha20poly1305.c | 5 +++++
 1 file changed, 5 insertions(+)

--- a/lib/crypto/chacha20poly1305.c
+++ b/lib/crypto/chacha20poly1305.c
@@ -364,7 +364,12 @@ static int __init mod_init(void)
 	return 0;
 }
 
+static void __exit mod_exit(void)
+{
+}
+
 module_init(mod_init);
+module_exit(mod_exit);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("ChaCha20Poly1305 AEAD construction");
 MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");