docs: dm-integrity: remove reference to ARC4

ARC4 is no longer considered secure, so it shouldn't be used, even as
just an example.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/Documentation/admin-guide/device-mapper/dm-integrity.rst b/Documentation/admin-guide/device-mapper/dm-integrity.rst
index 594095b..c00f9f1 100644 (file)
--- a/Documentation/admin-guide/device-mapper/dm-integrity.rst
+++ b/Documentation/admin-guide/device-mapper/dm-integrity.rst
@@ -144,7 +144,7 @@ journal_crypt:algorithm(:key)       (the key is optional)
        Encrypt the journal using given algorithm to make sure that the
        attacker can't read the journal. You can use a block cipher here
        (such as "cbc(aes)") or a stream cipher (for example "chacha20",
-       "salsa20", "ctr(aes)" or "ecb(arc4)").
+       "salsa20" or "ctr(aes)").
 
        The journal contains history of last writes to the block device,
        an attacker reading the journal could see the last sector nubmers