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Date:   Mon, 15 Jul 2019 10:02:05 -0400
From:   Sasha Levin <>
Cc:     Arnd Bergmann <>,
        Herbert Xu <>,
        Steffen Klassert <>,
        Sasha Levin <>,
Subject: [PATCH AUTOSEL 5.1 124/219] ipsec: select crypto ciphers for xfrm_algo

From: Arnd Bergmann <>

[ Upstream commit 597179b0ba550bd83fab1a9d57c42a9343c58514 ] reports failed builds on arc because of what looks
like an old missed 'select' statement:

net/xfrm/xfrm_algo.o: In function `xfrm_probe_algs':
xfrm_algo.c:(.text+0x1e8): undefined reference to `crypto_has_ahash'

I don't see this in randconfig builds on other architectures, but
it's fairly clear we want to select the hash code for it, like we
do for all its other users. As Herbert points out, CRYPTO_BLKCIPHER
is also required even though it has not popped up in build tests.

Fixes: 17bc19702221 ("ipsec: Use skcipher and ahash when probing algorithms")
Signed-off-by: Arnd Bergmann <>
Acked-by: Herbert Xu <>
Signed-off-by: Steffen Klassert <>
Signed-off-by: Sasha Levin <>
 net/xfrm/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index 5d43aaa17027..831668ee8229 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -14,6 +14,8 @@ config XFRM_ALGO
 	select XFRM
 	select CRYPTO
+	select CRYPTO_HASH
 config XFRM_USER
 	tristate "Transformation user configuration interface"

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