Linux-Next discussions

* linux-next: build failure after merge of the final tree (net tree related)
From: Stephen Rothwell @ 2012-01-09  5:38 UTC (permalink / raw)
  To: David Miller, netdev; +Cc: linux-next, linux-kernel, Glauber Costa

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Hi ,

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

In file included from include/linux/tcp.h:211:0,
                 from include/linux/ipv6.h:221,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:26,
                 from include/linux/nfs_fs.h:50,
                 from init/do_mounts.c:20:
include/net/sock.h: In function 'sk_update_clone':
include/net/sock.h:1109:3: error: implicit declaration of function 'sock_update_memcg' [-Werror=implicit-function-declaration]

Caused by commit f3f511e1ce6f ("net: fix sock_clone reference mismatch
with tcp memcontrol") from the net tree.  In this build, CONFIG_INET is not set.

I applied the following patch for today:

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 9 Jan 2012 16:33:16 +1100
Subject: [PATCH] net: sk_update_clone is only used in net/core/sock.c

so move it there.  Fixes build errors when CONFIG_INET is not defeined:

In file included from include/linux/tcp.h:211:0,
                 from include/linux/ipv6.h:221,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:26,
                 from include/linux/nfs_fs.h:50,
                 from init/do_mounts.c:20:
include/net/sock.h: In function 'sk_update_clone':
include/net/sock.h:1109:3: error: implicit declaration of function 'sock_update_memcg' [-Werror=implicit-function-declaration]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 include/net/sock.h |    6 ------
 net/core/sock.c    |    6 ++++++
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 0ed65e3..bb972d2 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1103,12 +1103,6 @@ sk_sockets_allocated_read_positive(struct sock *sk)
 	return percpu_counter_sum_positive(prot->sockets_allocated);
 }
 
-static inline void sk_update_clone(const struct sock *sk, struct sock *newsk)
-{
-	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
-		sock_update_memcg(newsk);
-}
-
 static inline int
 proto_sockets_allocated_sum_positive(struct proto *prot)
 {
diff --git a/net/core/sock.c b/net/core/sock.c
index e80b64f..c3ae73d 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1272,6 +1272,12 @@ void sk_release_kernel(struct sock *sk)
 }
 EXPORT_SYMBOL(sk_release_kernel);
 
+static void sk_update_clone(const struct sock *sk, struct sock *newsk)
+{
+	if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
+		sock_update_memcg(newsk);
+}
+
 /**
  *	sk_clone_lock - clone a socket, and lock its clone
  *	@sk: the socket to clone
-- 
1.7.8.197.g73c6b

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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