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* [PATCH v2] Deinline __nlmsg_put and genlmsg_put. -7k code on i386 defconfig.
@ 2012-01-30 19:37 Denys Vlasenko
  2012-01-30 20:22 ` David Miller
  0 siblings, 1 reply; 2+ messages in thread
From: Denys Vlasenko @ 2012-01-30 19:37 UTC (permalink / raw)
  To: netdev; +Cc: Denys Vlasenko, linux-kernel

   text	   data	    bss	    dec	    hex	filename
8455963	 532732	1810804	10799499 a4c98b	vmlinux.o.before
8448899	 532732	1810804	10792435 a4adf3	vmlinux.o

This change also removes commented-out copy of __nlmsg_put
which was last touched in 2005 with "Enable once all users
have been converted" comment on top.

Changes in v2: rediffed against net-next.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 include/linux/netlink.h  |   18 ++----------------
 include/net/genetlink.h  |   31 ++-----------------------------
 include/net/netlink.h    |   35 -----------------------------------
 net/netlink/af_netlink.c |   18 ++++++++++++++++++
 net/netlink/genetlink.c  |   31 +++++++++++++++++++++++++++++++
 5 files changed, 53 insertions(+), 80 deletions(-)

diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 52e4895..a390e9d 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -237,22 +237,8 @@ struct netlink_notify {
 	int protocol;
 };
 
-static __inline__ struct nlmsghdr *
-__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
-{
-	struct nlmsghdr *nlh;
-	int size = NLMSG_LENGTH(len);
-
-	nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
-	nlh->nlmsg_type = type;
-	nlh->nlmsg_len = size;
-	nlh->nlmsg_flags = flags;
-	nlh->nlmsg_pid = pid;
-	nlh->nlmsg_seq = seq;
-	if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
-		memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
-	return nlh;
-}
+struct nlmsghdr *
+__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags);
 
 #define NLMSG_NEW(skb, pid, seq, type, len, flags) \
 ({	if (unlikely(skb_tailroom(skb) < (int)NLMSG_SPACE(len))) \
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 7db3299..ccb6888 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -131,35 +131,8 @@ extern void genl_unregister_mc_group(struct genl_family *family,
 extern void genl_notify(struct sk_buff *skb, struct net *net, u32 pid,
 			u32 group, struct nlmsghdr *nlh, gfp_t flags);
 
-/**
- * genlmsg_put - Add generic netlink header to netlink message
- * @skb: socket buffer holding the message
- * @pid: netlink pid the message is addressed to
- * @seq: sequence number (usually the one of the sender)
- * @family: generic netlink family
- * @flags netlink message flags
- * @cmd: generic netlink command
- *
- * Returns pointer to user specific header
- */
-static inline void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,
-				struct genl_family *family, int flags, u8 cmd)
-{
-	struct nlmsghdr *nlh;
-	struct genlmsghdr *hdr;
-
-	nlh = nlmsg_put(skb, pid, seq, family->id, GENL_HDRLEN +
-			family->hdrsize, flags);
-	if (nlh == NULL)
-		return NULL;
-
-	hdr = nlmsg_data(nlh);
-	hdr->cmd = cmd;
-	hdr->version = family->version;
-	hdr->reserved = 0;
-
-	return (char *) hdr + GENL_HDRLEN;
-}
+void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,
+				struct genl_family *family, int flags, u8 cmd);
 
 /**
  * genlmsg_nlhdr - Obtain netlink header from user specified header
diff --git a/include/net/netlink.h b/include/net/netlink.h
index cb1f350..f394fe5 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -441,41 +441,6 @@ static inline int nlmsg_report(const struct nlmsghdr *nlh)
 	nla_for_each_attr(pos, nlmsg_attrdata(nlh, hdrlen), \
 			  nlmsg_attrlen(nlh, hdrlen), rem)
 
-#if 0
-/* FIXME: Enable once all users have been converted */
-
-/**
- * __nlmsg_put - Add a new netlink message to an skb
- * @skb: socket buffer to store message in
- * @pid: netlink process id
- * @seq: sequence number of message
- * @type: message type
- * @payload: length of message payload
- * @flags: message flags
- *
- * The caller is responsible to ensure that the skb provides enough
- * tailroom for both the netlink header and payload.
- */
-static inline struct nlmsghdr *__nlmsg_put(struct sk_buff *skb, u32 pid,
-					   u32 seq, int type, int payload,
-					   int flags)
-{
-	struct nlmsghdr *nlh;
-
-	nlh = (struct nlmsghdr *) skb_put(skb, nlmsg_total_size(payload));
-	nlh->nlmsg_type = type;
-	nlh->nlmsg_len = nlmsg_msg_size(payload);
-	nlh->nlmsg_flags = flags;
-	nlh->nlmsg_pid = pid;
-	nlh->nlmsg_seq = seq;
-
-	memset((unsigned char *) nlmsg_data(nlh) + payload, 0,
-	       nlmsg_padlen(payload));
-
-	return nlh;
-}
-#endif
-
 /**
  * nlmsg_put - Add a new netlink message to an skb
  * @skb: socket buffer to store message in
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 629b061..4d751e3 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1645,6 +1645,24 @@ static void netlink_destroy_callback(struct netlink_callback *cb)
 	kfree(cb);
 }
 
+struct nlmsghdr *
+__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
+{
+	struct nlmsghdr *nlh;
+	int size = NLMSG_LENGTH(len);
+
+	nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
+	nlh->nlmsg_type = type;
+	nlh->nlmsg_len = size;
+	nlh->nlmsg_flags = flags;
+	nlh->nlmsg_pid = pid;
+	nlh->nlmsg_seq = seq;
+	if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
+		memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
+	return nlh;
+}
+EXPORT_SYMBOL(__nlmsg_put);
+
 /*
  * It looks a bit ugly.
  * It would be better to create kernel thread.
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index c29d256..a115471 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -498,6 +498,37 @@ int genl_unregister_family(struct genl_family *family)
 }
 EXPORT_SYMBOL(genl_unregister_family);
 
+/**
+ * genlmsg_put - Add generic netlink header to netlink message
+ * @skb: socket buffer holding the message
+ * @pid: netlink pid the message is addressed to
+ * @seq: sequence number (usually the one of the sender)
+ * @family: generic netlink family
+ * @flags netlink message flags
+ * @cmd: generic netlink command
+ *
+ * Returns pointer to user specific header
+ */
+void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,
+				struct genl_family *family, int flags, u8 cmd)
+{
+	struct nlmsghdr *nlh;
+	struct genlmsghdr *hdr;
+
+	nlh = nlmsg_put(skb, pid, seq, family->id, GENL_HDRLEN +
+			family->hdrsize, flags);
+	if (nlh == NULL)
+		return NULL;
+
+	hdr = nlmsg_data(nlh);
+	hdr->cmd = cmd;
+	hdr->version = family->version;
+	hdr->reserved = 0;
+
+	return (char *) hdr + GENL_HDRLEN;
+}
+EXPORT_SYMBOL(genlmsg_put);
+
 static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
 	struct genl_ops *ops;
-- 
1.7.7.6


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH v2] Deinline __nlmsg_put and genlmsg_put. -7k code on i386 defconfig.
  2012-01-30 19:37 [PATCH v2] Deinline __nlmsg_put and genlmsg_put. -7k code on i386 defconfig Denys Vlasenko
@ 2012-01-30 20:22 ` David Miller
  0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2012-01-30 20:22 UTC (permalink / raw)
  To: vda.linux; +Cc: netdev, linux-kernel

From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Mon, 30 Jan 2012 20:37:37 +0100

>    text	   data	    bss	    dec	    hex	filename
> 8455963	 532732	1810804	10799499 a4c98b	vmlinux.o.before
> 8448899	 532732	1810804	10792435 a4adf3	vmlinux.o
> 
> This change also removes commented-out copy of __nlmsg_put
> which was last touched in 2005 with "Enable once all users
> have been converted" comment on top.
> 
> Changes in v2: rediffed against net-next.
> 
> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

Applied, thanks.

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2012-01-30 19:37 [PATCH v2] Deinline __nlmsg_put and genlmsg_put. -7k code on i386 defconfig Denys Vlasenko
2012-01-30 20:22 ` David Miller

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