linux-kernel - Re: linux-next: build failure after merge of the final tree (net-next tree related)

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Date:	Tue, 04 Sep 2012 14:20:59 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	sfr@...b.auug.org.au
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	hkchu@...gle.com
Subject: Re: linux-next: build failure after merge of the final tree
 (net-next tree related)

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 4 Sep 2012 16:58:53 +1000

> net/built-in.o: In function `tcp_fastopen_ctx_free':
> tcp_fastopen.c:(.text+0x5cc5c): undefined reference to `crypto_destroy_tfm'
> net/built-in.o: In function `tcp_fastopen_reset_cipher':
> (.text+0x5cccc): undefined reference to `crypto_alloc_base'
> net/built-in.o: In function `tcp_fastopen_reset_cipher':
> (.text+0x5cd6c): undefined reference to `crypto_destroy_tfm'
> 
> Presumably caused by commit 104671636897 ("tcp: TCP Fast Open Server -
> header & support functions") from the net-next tree.  I assume that some
> dependency on the CRYPTO infrastructure is missing.

Thanks for the report, I've pushed the following change to net-next
which should address this:

--------------------
[PATCH] net: Add INET dependency on aes crypto for the sake of TCP fastopen.

Stephen Rothwell says:

====================
After merging the final tree, today's linux-next build (powerpc
ppc44x_defconfig) failed like this:

net/built-in.o: In function `tcp_fastopen_ctx_free':
tcp_fastopen.c:(.text+0x5cc5c): undefined reference to `crypto_destroy_tfm'
net/built-in.o: In function `tcp_fastopen_reset_cipher':
(.text+0x5cccc): undefined reference to `crypto_alloc_base'
net/built-in.o: In function `tcp_fastopen_reset_cipher':
(.text+0x5cd6c): undefined reference to `crypto_destroy_tfm'

Presumably caused by commit 104671636897 ("tcp: TCP Fast Open Server -
header & support functions") from the net-next tree.  I assume that some
dependency on the CRYPTO infrastructure is missing.

I have reverted commit 1bed966cc3bd ("Merge branch
'tcp_fastopen_server'") for today.
====================

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 net/Kconfig |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/Kconfig b/net/Kconfig
index 245831b..30b48f5 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -52,6 +52,8 @@ source "net/iucv/Kconfig"
 
 config INET
 	bool "TCP/IP networking"
+	select CRYPTO
+	select CRYPTO_AES
 	---help---
 	  These are the protocols used on the Internet and on most local
 	  Ethernets. It is highly recommended to say Y here (this will enlarge
-- 
1.7.7.6

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