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Message-ID: <20070920072328.GA5113@devil>
Date: Thu, 20 Sep 2007 09:23:28 +0200
From: Andreas Herrmann <aherrman@...or.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Eric Van Hensbergen <ericvh@...il.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] 9p: fix compile error if !CONFIG_SYSCTL
On Wed, Sep 19, 2007 at 11:31:10PM -0700, Andrew Morton wrote:
> On Tue, 18 Sep 2007 10:05:37 +0200 Andreas Herrmann <aherrman@...or.de> wrote:
>
> > Fix compile error if !CONFIG_SYSCTL:
> >
> > ...
> > LD .tmp_vmlinux1
> > net/built-in.o: In function `init_p9':
> > net/9p/mod.c:59: undefined reference to `p9_sysctl_register'
> > net/built-in.o: In function `exit_p9':
> > net/9p/mod.c:75: undefined reference to `p9_sysctl_unregister'
> > make: *** [.tmp_vmlinux1] Error 1
> > ...
>
> A better fix would be
But only if you add another
#endif /* CONFIG_SYSCTL */
Right?
;-)
>
> --- a/include/net/9p/9p.h~9p-fix-compile-error-if-config_sysctl
> +++ a/include/net/9p/9p.h
> @@ -412,6 +412,17 @@ int p9_idpool_check(int id, struct p9_id
>
> int p9_error_init(void);
> int p9_errstr2errno(char *, int);
> +#ifdef CONFIG_SYSCTL
> int __init p9_sysctl_register(void);
> void __exit p9_sysctl_unregister(void);
> +#else
> +static inline int p9_sysctl_register(void)
> +{
> + return 0;
> +}
> +
> +static inline void p9_sysctl_unregister(void)
> +{
> +}
> +
> #endif /* NET_9P_H */
> diff -puN net/9p/mod.c~9p-fix-compile-error-if-config_sysctl net/9p/mod.c
> _
>
> I struggled for five minutes trying to work out how to make CONFIG_SYSCTL
> go away and gave up in disgust.
>
> God I hate select.
Hmm, you mean to completely avoid "#ifdef CONFIG_SYSCTL" in the net/p9 code?
How about below patch, which just merges net/9p/sysctl.c into net/9p/mod.c.
Regards,
Andreas
--
Merge net/p9/sysctl.c into net/p9/mod.c to avoid build errors
if !CONFIG_SYSCTL.
Signed-off-by: Andreas Herrmann <aherrman@...or.de>
---
include/net/9p/9p.h | 2 -
net/9p/Makefile | 4 +--
net/9p/mod.c | 54 +++++++++++++++++++++++++++++----
net/9p/sysctl.c | 81 ---------------------------------------------------
4 files changed, 48 insertions(+), 93 deletions(-)
delete mode 100644 net/9p/sysctl.c
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 88884d3..f69992f 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -412,6 +412,4 @@ int p9_idpool_check(int id, struct p9_idpool *p);
int p9_error_init(void);
int p9_errstr2errno(char *, int);
-int __init p9_sysctl_register(void);
-void __exit p9_sysctl_unregister(void);
#endif /* NET_9P_H */
diff --git a/net/9p/Makefile b/net/9p/Makefile
index 85b3a78..488026a 100644
--- a/net/9p/Makefile
+++ b/net/9p/Makefile
@@ -8,6 +8,4 @@ obj-$(CONFIG_NET_9P) := 9pnet.o
conv.o \
error.o \
fcprint.o \
- util.o \
-
-9pnet-$(CONFIG_SYSCTL) += sysctl.o
+ util.o
diff --git a/net/9p/mod.c b/net/9p/mod.c
index 4f9e1d2..8d4ce1b 100644
--- a/net/9p/mod.c
+++ b/net/9p/mod.c
@@ -24,6 +24,10 @@
*
*/
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <net/9p/9p.h>
@@ -37,8 +41,44 @@ MODULE_PARM_DESC(debug, "9P debugging level");
extern int p9_mux_global_init(void);
extern void p9_mux_global_exit(void);
-extern int p9_sysctl_register(void);
-extern void p9_sysctl_unregister(void);
+
+static struct ctl_table p9_table[] = {
+#ifdef CONFIG_NET_9P_DEBUG
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "debug",
+ .data = &p9_debug_level,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+#endif
+ {},
+};
+
+static struct ctl_table p9_net_table[] = {
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "9p",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = p9_table,
+ },
+ {},
+};
+
+static struct ctl_table p9_ctl_table[] = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = p9_net_table,
+ },
+ {},
+};
+
+static struct ctl_table_header *p9_table_header;
/**
* v9fs_init - Initialize module
@@ -56,13 +96,13 @@ static int __init init_p9(void)
return ret;
}
- ret = p9_sysctl_register();
- if (ret) {
+ p9_table_header = register_sysctl_table(p9_ctl_table);
+ if (!p9_table_header) {
printk(KERN_WARNING "9p: registering sysctl failed\n");
- return ret;
+ return -ENOMEM;
}
- return ret;
+ return 0;
}
/**
@@ -72,7 +112,7 @@ static int __init init_p9(void)
static void __exit exit_p9(void)
{
- p9_sysctl_unregister();
+ unregister_sysctl_table(p9_table_header);
p9_mux_global_exit();
}
diff --git a/net/9p/sysctl.c b/net/9p/sysctl.c
deleted file mode 100644
index 8b61027..0000000
--- a/net/9p/sysctl.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * net/9p/sysctl.c
- *
- * 9P sysctl interface
- *
- * Copyright (C) 2007 by Latchesar Ionkov <lucho@...kov.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sysctl.h>
-#include <linux/init.h>
-#include <net/9p/9p.h>
-
-static struct ctl_table p9_table[] = {
-#ifdef CONFIG_NET_9P_DEBUG
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "debug",
- .data = &p9_debug_level,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec
- },
-#endif
- {},
-};
-
-static struct ctl_table p9_net_table[] = {
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "9p",
- .maxlen = 0,
- .mode = 0555,
- .child = p9_table,
- },
- {},
-};
-
-static struct ctl_table p9_ctl_table[] = {
- {
- .ctl_name = CTL_NET,
- .procname = "net",
- .maxlen = 0,
- .mode = 0555,
- .child = p9_net_table,
- },
- {},
-};
-
-static struct ctl_table_header *p9_table_header;
-
-int __init p9_sysctl_register(void)
-{
- p9_table_header = register_sysctl_table(p9_ctl_table);
- if (!p9_table_header)
- return -ENOMEM;
-
- return 0;
-}
-
-void __exit p9_sysctl_unregister(void)
-{
- unregister_sysctl_table(p9_table_header);
-}
--
1.5.3
-
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