[PATCH] sysctl: remove insert_at_head from register_sysctl

The semantic effect of insert_at_head is that it would allow new registered
sysctl entries to override existing sysctl entries of the same name.  Which is
pain for caching and the proc interface never implemented.

I have done an audit and discovered that none of the current users of
register_sysctl care as (excpet for directories) they do not register
duplicate sysctl entries.

So this patch simply removes the support for overriding existing entries in
the sys_sysctl interface since no one uses it or cares and it makes future
enhancments harder.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Corey Minyard <minyard@acm.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: David Chinner <dgc@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 files changed, 7 insertions, 7 deletions

diff --git a/fs/coda/sysctl.c b/fs/coda/sysctl.c
index 8e50642f57e8..c57a1fa7cf23 100644
--- a/fs/coda/sysctl.c
+++ b/fs/coda/sysctl.c
@@ -271,7 +271,7 @@ void coda_sysctl_init(void)
 
 #ifdef CONFIG_SYSCTL
 	if ( !fs_table_header )
-		fs_table_header = register_sysctl_table(fs_table, 0);
+		fs_table_header = register_sysctl_table(fs_table);
 #endif 
 }
 
diff --git a/fs/dquot.c b/fs/dquot.c
index 9eb166f91489..b16f991662c1 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -1841,7 +1841,7 @@ static int __init dquot_init(void)
 
 	printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__);
 
-	register_sysctl_table(sys_table, 0);
+	register_sysctl_table(sys_table);
 
 	dquot_cachep = kmem_cache_create("dquot", 
 			sizeof(struct dquot), sizeof(unsigned long) * 4,
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 80fcacc1acf9..50cb8daba4e5 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -512,7 +512,7 @@ module_param(nsm_use_hostnames, bool, 0644);
 
 static int __init init_nlm(void)
 {
-	nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root, 0);
+	nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root);
 	return nlm_sysctl_table ? 0 : -ENOMEM;
 }
 
diff --git a/fs/nfs/sysctl.c b/fs/nfs/sysctl.c
index 3ea50ac64820..fcdcafbb3293 100644
--- a/fs/nfs/sysctl.c
+++ b/fs/nfs/sysctl.c
@@ -75,7 +75,7 @@ static ctl_table nfs_cb_sysctl_root[] = {
 
 int nfs_register_sysctl(void)
 {
-	nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root, 0);
+	nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
 	if (nfs_callback_sysctl_table == NULL)
 		return -ENOMEM;
 	return 0;
diff --git a/fs/ntfs/sysctl.c b/fs/ntfs/sysctl.c
index 4757f6b7a28c..1f1ee4c9eacc 100644
--- a/fs/ntfs/sysctl.c
+++ b/fs/ntfs/sysctl.c
@@ -70,7 +70,7 @@ int ntfs_sysctl(int add)
 {
 	if (add) {
 		BUG_ON(sysctls_root_table);
-		sysctls_root_table = register_sysctl_table(sysctls_root, 0);
+		sysctls_root_table = register_sysctl_table(sysctls_root);
 		if (!sysctls_root_table)
 			return -ENOMEM;
 #ifdef CONFIG_PROC_FS
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index df763c7fd083..9f5ad0f01ce0 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -922,7 +922,7 @@ static int __init init_o2nm(void)
 	o2hb_init();
 	o2net_init();
 
-	ocfs2_table_header = register_sysctl_table(ocfs2_root_table, 0);
+	ocfs2_table_header = register_sysctl_table(ocfs2_root_table);
 	if (!ocfs2_table_header) {
 		printk(KERN_ERR "nodemanager: unable to register sysctl\n");
 		ret = -ENOMEM; /* or something. */
diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c b/fs/xfs/linux-2.6/xfs_sysctl.c
index 5c46c35a97a5..cd6eaa44aa2b 100644
--- a/fs/xfs/linux-2.6/xfs_sysctl.c
+++ b/fs/xfs/linux-2.6/xfs_sysctl.c
@@ -251,7 +251,7 @@ static ctl_table xfs_root_table[] = {
 void
 xfs_sysctl_register(void)
 {
-	xfs_table_header = register_sysctl_table(xfs_root_table, 0);
+	xfs_table_header = register_sysctl_table(xfs_root_table);
 }
 
 void